76 files changed, 814 insertions, 257 deletions

diff --git a/spec/fixtures/eslintignore.git/.eslintignore b/spec/fixtures/eslintignore.git/.eslintignore
deleted file mode 100644
index d85195b..0000000
--- a/spec/fixtures/eslintignore.git/.eslintignore
+++ /dev/null
@@ -1,2 +0,0 @@
-ignored/**/*.js
-!ignored/not_ignored.js
diff --git a/spec/fixtures/eslintignore.git/.eslintrc b/spec/fixtures/eslintignore.git/.eslintrc
deleted file mode 100644
index f94ba96..0000000
--- a/spec/fixtures/eslintignore.git/.eslintrc
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-    "env": {
-        "browser": true,
-        "es6": true
-    },
-    "extends": "eslint:recommended"
-}
diff --git a/spec/fixtures/eslintignore.git/git/HEAD b/spec/fixtures/eslintignore.git/git/HEAD
deleted file mode 100644
index fac958f..0000000
--- a/spec/fixtures/eslintignore.git/git/HEAD
+++ /dev/null
@@ -1 +0,0 @@
-ref: refs/heads/eslintignore
diff --git a/spec/fixtures/eslintignore.git/git/config b/spec/fixtures/eslintignore.git/git/config
deleted file mode 100644
index 6c9406b..0000000
--- a/spec/fixtures/eslintignore.git/git/config
+++ /dev/null
@@ -1,7 +0,0 @@
-[core]
-        repositoryformatversion = 0
-        filemode = true
-        bare = false
-        logallrefupdates = true
-        ignorecase = true
-        precomposeunicode = true
diff --git a/spec/fixtures/eslintignore.git/git/index b/spec/fixtures/eslintignore.git/git/index
deleted file mode 100644
index 8c5575c..0000000
--- a/spec/fixtures/eslintignore.git/git/index
+++ /dev/null
diff --git a/spec/fixtures/eslintignore.git/git/logs/HEAD b/spec/fixtures/eslintignore.git/git/logs/HEAD
deleted file mode 100644
index 8750baa..0000000
--- a/spec/fixtures/eslintignore.git/git/logs/HEAD
+++ /dev/null
@@ -1,3 +0,0 @@
-0000000000000000000000000000000000000000 d43de0396c81608113f99f7afd00f7f363e1cae8 Markus Doits <markus.doits@stellenticket.de> 1469450052 +0200 commit (initial): empty init commit
-d43de0396c81608113f99f7afd00f7f363e1cae8 d43de0396c81608113f99f7afd00f7f363e1cae8 Markus Doits <markus.doits@stellenticket.de> 1469450062 +0200 checkout: moving from master to eslintignore
-d43de0396c81608113f99f7afd00f7f363e1cae8 5ffc9b3c7f8e8d8f2e8c91cb69c9698405d1ca53 Markus Doits <markus.doits@stellenticket.de> 1469450067 +0200 commit: add .eslintignore and files with errors
diff --git a/spec/fixtures/eslintignore.git/git/logs/refs/heads/eslintignore b/spec/fixtures/eslintignore.git/git/logs/refs/heads/eslintignore
deleted file mode 100644
index 3467ecc..0000000
--- a/spec/fixtures/eslintignore.git/git/logs/refs/heads/eslintignore
+++ /dev/null
@@ -1,2 +0,0 @@
-0000000000000000000000000000000000000000 d43de0396c81608113f99f7afd00f7f363e1cae8 Markus Doits <markus.doits@stellenticket.de> 1469450062 +0200 branch: Created from HEAD
-d43de0396c81608113f99f7afd00f7f363e1cae8 5ffc9b3c7f8e8d8f2e8c91cb69c9698405d1ca53 Markus Doits <markus.doits@stellenticket.de> 1469450067 +0200 commit: add .eslintignore and files with errors
diff --git a/spec/fixtures/eslintignore.git/git/logs/refs/heads/master b/spec/fixtures/eslintignore.git/git/logs/refs/heads/master
deleted file mode 100644
index 8105749..0000000
--- a/spec/fixtures/eslintignore.git/git/logs/refs/heads/master
+++ /dev/null
@@ -1 +0,0 @@
-0000000000000000000000000000000000000000 d43de0396c81608113f99f7afd00f7f363e1cae8 Markus Doits <markus.doits@stellenticket.de> 1469450052 +0200 commit (initial): empty init commit
diff --git a/spec/fixtures/eslintignore.git/git/objects/2d/1b9966feb19d665a9e5bb6a5bde410203a68f7 b/spec/fixtures/eslintignore.git/git/objects/2d/1b9966feb19d665a9e5bb6a5bde410203a68f7
deleted file mode 100644
index f5fbdc5..0000000
--- a/spec/fixtures/eslintignore.git/git/objects/2d/1b9966feb19d665a9e5bb6a5bde410203a68f7
+++ /dev/null
diff --git a/spec/fixtures/eslintignore.git/git/objects/4b/825dc642cb6eb9a060e54bf8d69288fbee4904 b/spec/fixtures/eslintignore.git/git/objects/4b/825dc642cb6eb9a060e54bf8d69288fbee4904
deleted file mode 100644
index adf6411..0000000
--- a/spec/fixtures/eslintignore.git/git/objects/4b/825dc642cb6eb9a060e54bf8d69288fbee4904
+++ /dev/null
diff --git a/spec/fixtures/eslintignore.git/git/objects/5f/fc9b3c7f8e8d8f2e8c91cb69c9698405d1ca53 b/spec/fixtures/eslintignore.git/git/objects/5f/fc9b3c7f8e8d8f2e8c91cb69c9698405d1ca53
deleted file mode 100644
index 832698f..0000000
--- a/spec/fixtures/eslintignore.git/git/objects/5f/fc9b3c7f8e8d8f2e8c91cb69c9698405d1ca53
+++ /dev/null
diff --git a/spec/fixtures/eslintignore.git/git/objects/69/7ffd3c693fce9abcb871b9b47e2d116e6241d3 b/spec/fixtures/eslintignore.git/git/objects/69/7ffd3c693fce9abcb871b9b47e2d116e6241d3
deleted file mode 100644
index c23a96f..0000000
--- a/spec/fixtures/eslintignore.git/git/objects/69/7ffd3c693fce9abcb871b9b47e2d116e6241d3
+++ /dev/null
diff --git a/spec/fixtures/eslintignore.git/git/objects/d4/3de0396c81608113f99f7afd00f7f363e1cae8 b/spec/fixtures/eslintignore.git/git/objects/d4/3de0396c81608113f99f7afd00f7f363e1cae8
deleted file mode 100644
index e3c829c..0000000
--- a/spec/fixtures/eslintignore.git/git/objects/d4/3de0396c81608113f99f7afd00f7f363e1cae8
+++ /dev/null
@@ -1,2 +0,0 @@
-x
��K
-�0@]���&!
n=D>SmZI�o��#�|��xi��h�i�@�i��%����ZdCqt�z����#���cmpm�:��"�u�!�څ�)ib2_�D֓A4��U����zק��,���S�
��E�
\ No newline at end of file
diff --git a/spec/fixtures/eslintignore.git/git/objects/d8/5195b5ff74cc05d121b758f00da43018f53b6f b/spec/fixtures/eslintignore.git/git/objects/d8/5195b5ff74cc05d121b758f00da43018f53b6f
deleted file mode 100644
index ee9657e..0000000
--- a/spec/fixtures/eslintignore.git/git/objects/d8/5195b5ff74cc05d121b758f00da43018f53b6f
+++ /dev/null
diff --git a/spec/fixtures/eslintignore.git/git/objects/ec/7b4537cbd327a580ee44b74ff02fffc74feb46 b/spec/fixtures/eslintignore.git/git/objects/ec/7b4537cbd327a580ee44b74ff02fffc74feb46
deleted file mode 100644
index 9a642e0..0000000
--- a/spec/fixtures/eslintignore.git/git/objects/ec/7b4537cbd327a580ee44b74ff02fffc74feb46
+++ /dev/null
diff --git a/spec/fixtures/eslintignore.git/git/refs/heads/eslintignore b/spec/fixtures/eslintignore.git/git/refs/heads/eslintignore
deleted file mode 100644
index d02562a..0000000
--- a/spec/fixtures/eslintignore.git/git/refs/heads/eslintignore
+++ /dev/null
@@ -1 +0,0 @@
-5ffc9b3c7f8e8d8f2e8c91cb69c9698405d1ca53
diff --git a/spec/fixtures/eslintignore.git/git/refs/heads/master b/spec/fixtures/eslintignore.git/git/refs/heads/master
deleted file mode 100644
index 5dcf161..0000000
--- a/spec/fixtures/eslintignore.git/git/refs/heads/master
+++ /dev/null
@@ -1 +0,0 @@
-d43de0396c81608113f99f7afd00f7f363e1cae8
diff --git a/spec/fixtures/eslintignore.git/ignored/ignored.js b/spec/fixtures/eslintignore.git/ignored/ignored.js
deleted file mode 100644
index 2d1b996..0000000
--- a/spec/fixtures/eslintignore.git/ignored/ignored.js
+++ /dev/null
@@ -1,5 +0,0 @@
-function HelloWorld(name)
-{
-    if (foo) foo++;
-    alert(name);
-}
diff --git a/spec/fixtures/eslintignore.git/ignored/not_ignored.js b/spec/fixtures/eslintignore.git/ignored/not_ignored.js
deleted file mode 100644
index 2d1b996..0000000
--- a/spec/fixtures/eslintignore.git/ignored/not_ignored.js
+++ /dev/null
@@ -1,5 +0,0 @@
-function HelloWorld(name)
-{
-    if (foo) foo++;
-    alert(name);
-}
diff --git a/spec/fixtures/test.git/.eslintrc b/spec/fixtures/test.git/.eslintrc
deleted file mode 100644
index f94ba96..0000000
--- a/spec/fixtures/test.git/.eslintrc
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-    "env": {
-        "browser": true,
-        "es6": true
-    },
-    "extends": "eslint:recommended"
-}
diff --git a/spec/fixtures/test.git/custom_eslint.sh b/spec/fixtures/test.git/custom_eslint.sh
deleted file mode 100755
index 54fafdc..0000000
--- a/spec/fixtures/test.git/custom_eslint.sh
+++ /dev/null
@@ -1 +0,0 @@
-printf 'custom eslint called'
diff --git a/spec/fixtures/test.git/custom_hlint.sh b/spec/fixtures/test.git/custom_hlint.sh
new file mode 100755
index 0000000..c80c268
--- /dev/null
+++ b/spec/fixtures/test.git/custom_hlint.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+echo "hlint called!"
diff --git a/spec/fixtures/test.git/git/COMMIT_EDITMSG b/spec/fixtures/test.git/git/COMMIT_EDITMSG
new file mode 100644
index 0000000..d788b46
--- /dev/null
+++ b/spec/fixtures/test.git/git/COMMIT_EDITMSG
@@ -0,0 +1 @@
+Add hs files with hlint errors
diff --git a/spec/fixtures/test.git/git/HEAD b/spec/fixtures/test.git/git/HEAD
index c15524d..feb5fdb 100644
--- a/spec/fixtures/test.git/git/HEAD
+++ b/spec/fixtures/test.git/git/HEAD
@@ -1 +1 @@
-ref: refs/heads/curly
+ref: refs/heads/hlint
diff --git a/spec/fixtures/test.git/git/config b/spec/fixtures/test.git/git/config
index 6c9406b..515f483 100644
--- a/spec/fixtures/test.git/git/config
+++ b/spec/fixtures/test.git/git/config
@@ -3,5 +3,3 @@
         filemode = true
         bare = false
         logallrefupdates = true
-        ignorecase = true
-        precomposeunicode = true
diff --git a/spec/fixtures/test.git/git/description b/spec/fixtures/test.git/git/description
new file mode 100644
index 0000000..498b267
--- /dev/null
+++ b/spec/fixtures/test.git/git/description
@@ -0,0 +1 @@
+Unnamed repository; edit this file 'description' to name the repository.
diff --git a/spec/fixtures/test.git/git/hooks/applypatch-msg.sample b/spec/fixtures/test.git/git/hooks/applypatch-msg.sample
new file mode 100755
index 0000000..a5d7b84
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/applypatch-msg.sample
@@ -0,0 +1,15 @@
+#!/bin/sh
+#
+# An example hook script to check the commit log message taken by
+# applypatch from an e-mail message.
+#
+# The hook should exit with non-zero status after issuing an
+# appropriate message if it wants to stop the commit.  The hook is
+# allowed to edit the commit message file.
+#
+# To enable this hook, rename this file to "applypatch-msg".
+
+. git-sh-setup
+commitmsg="$(git rev-parse --git-path hooks/commit-msg)"
+test -x "$commitmsg" && exec "$commitmsg" ${1+"$@"}
+:
diff --git a/spec/fixtures/test.git/git/hooks/commit-msg.sample b/spec/fixtures/test.git/git/hooks/commit-msg.sample
new file mode 100755
index 0000000..b58d118
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/commit-msg.sample
@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# An example hook script to check the commit log message.
+# Called by "git commit" with one argument, the name of the file
+# that has the commit message.  The hook should exit with non-zero
+# status after issuing an appropriate message if it wants to stop the
+# commit.  The hook is allowed to edit the commit message file.
+#
+# To enable this hook, rename this file to "commit-msg".
+
+# Uncomment the below to add a Signed-off-by line to the message.
+# Doing this in a hook is a bad idea in general, but the prepare-commit-msg
+# hook is more suited to it.
+#
+# SOB=$(git var GIT_AUTHOR_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p')
+# grep -qs "^$SOB" "$1" || echo "$SOB" >> "$1"
+
+# This example catches duplicate Signed-off-by lines.
+
+test "" = "$(grep '^Signed-off-by: ' "$1" |
+         sort | uniq -c | sed -e '/^[   ]*1[    ]/d')" || {
+        echo >&2 Duplicate Signed-off-by lines.
+        exit 1
+}
diff --git a/spec/fixtures/test.git/git/hooks/fsmonitor-watchman.sample b/spec/fixtures/test.git/git/hooks/fsmonitor-watchman.sample
new file mode 100755
index 0000000..e673bb3
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/fsmonitor-watchman.sample
@@ -0,0 +1,114 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use IPC::Open2;
+
+# An example hook script to integrate Watchman
+# (https://facebook.github.io/watchman/) with git to speed up detecting
+# new and modified files.
+#
+# The hook is passed a version (currently 1) and a time in nanoseconds
+# formatted as a string and outputs to stdout all files that have been
+# modified since the given time. Paths must be relative to the root of
+# the working tree and separated by a single NUL.
+#
+# To enable this hook, rename this file to "query-watchman" and set
+# 'git config core.fsmonitor .git/hooks/query-watchman'
+#
+my ($version, $time) = @ARGV;
+
+# Check the hook interface version
+
+if ($version == 1) {
+        # convert nanoseconds to seconds
+        $time = int $time / 1000000000;
+} else {
+        die "Unsupported query-fsmonitor hook version '$version'.\n" .
+            "Falling back to scanning...\n";
+}
+
+my $git_work_tree;
+if ($^O =~ 'msys' || $^O =~ 'cygwin') {
+        $git_work_tree = Win32::GetCwd();
+        $git_work_tree =~ tr/\\/\//;
+} else {
+        require Cwd;
+        $git_work_tree = Cwd::cwd();
+}
+
+my $retry = 1;
+
+launch_watchman();
+
+sub launch_watchman {
+
+        my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j --no-pretty')
+            or die "open2() failed: $!\n" .
+            "Falling back to scanning...\n";
+
+        # In the query expression below we're asking for names of files that
+        # changed since $time but were not transient (ie created after
+        # $time but no longer exist).
+        #
+        # To accomplish this, we're using the "since" generator to use the
+        # recency index to select candidate nodes and "fields" to limit the
+        # output to file names only. Then we're using the "expression" term to
+        # further constrain the results.
+        #
+        # The category of transient files that we want to ignore will have a
+        # creation clock (cclock) newer than $time_t value and will also not
+        # currently exist.
+
+        my $query = <<" END";
+                ["query", "$git_work_tree", {
+                        "since": $time,
+                        "fields": ["name"],
+                        "expression": ["not", ["allof", ["since", $time, "cclock"], ["not", "exists"]]]
+                }]
+        END
+
+        print CHLD_IN $query;
+        close CHLD_IN;
+        my $response = do {local $/; <CHLD_OUT>};
+
+        die "Watchman: command returned no output.\n" .
+            "Falling back to scanning...\n" if $response eq "";
+        die "Watchman: command returned invalid output: $response\n" .
+            "Falling back to scanning...\n" unless $response =~ /^\{/;
+
+        my $json_pkg;
+        eval {
+                require JSON::XS;
+                $json_pkg = "JSON::XS";
+                1;
+        } or do {
+                require JSON::PP;
+                $json_pkg = "JSON::PP";
+        };
+
+        my $o = $json_pkg->new->utf8->decode($response);
+
+        if ($retry > 0 and $o->{error} and $o->{error} =~ m/unable to resolve root .* directory (.*) is not watched/) {
+                print STDERR "Adding '$git_work_tree' to watchman's watch list.\n";
+                $retry--;
+                qx/watchman watch "$git_work_tree"/;
+                die "Failed to make watchman watch '$git_work_tree'.\n" .
+                    "Falling back to scanning...\n" if $? != 0;
+
+                # Watchman will always return all files on the first query so
+                # return the fast "everything is dirty" flag to git and do the
+                # Watchman query just to get it over with now so we won't pay
+                # the cost in git to look up each individual file.
+                print "/\0";
+                eval { launch_watchman() };
+                exit 0;
+        }
+
+        die "Watchman: $o->{error}.\n" .
+            "Falling back to scanning...\n" if $o->{error};
+
+        binmode STDOUT, ":utf8";
+        local $, = "\0";
+        print @{$o->{files}};
+}
diff --git a/spec/fixtures/test.git/git/hooks/post-update.sample b/spec/fixtures/test.git/git/hooks/post-update.sample
new file mode 100755
index 0000000..ec17ec1
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/post-update.sample
@@ -0,0 +1,8 @@
+#!/bin/sh
+#
+# An example hook script to prepare a packed repository for use over
+# dumb transports.
+#
+# To enable this hook, rename this file to "post-update".
+
+exec git update-server-info
diff --git a/spec/fixtures/test.git/git/hooks/pre-applypatch.sample b/spec/fixtures/test.git/git/hooks/pre-applypatch.sample
new file mode 100755
index 0000000..4142082
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/pre-applypatch.sample
@@ -0,0 +1,14 @@
+#!/bin/sh
+#
+# An example hook script to verify what is about to be committed
+# by applypatch from an e-mail message.
+#
+# The hook should exit with non-zero status after issuing an
+# appropriate message if it wants to stop the commit.
+#
+# To enable this hook, rename this file to "pre-applypatch".
+
+. git-sh-setup
+precommit="$(git rev-parse --git-path hooks/pre-commit)"
+test -x "$precommit" && exec "$precommit" ${1+"$@"}
+:
diff --git a/spec/fixtures/test.git/git/hooks/pre-commit.sample b/spec/fixtures/test.git/git/hooks/pre-commit.sample
new file mode 100755
index 0000000..6a75641
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/pre-commit.sample
@@ -0,0 +1,49 @@
+#!/bin/sh
+#
+# An example hook script to verify what is about to be committed.
+# Called by "git commit" with no arguments.  The hook should
+# exit with non-zero status after issuing an appropriate message if
+# it wants to stop the commit.
+#
+# To enable this hook, rename this file to "pre-commit".
+
+if git rev-parse --verify HEAD >/dev/null 2>&1
+then
+        against=HEAD
+else
+        # Initial commit: diff against an empty tree object
+        against=$(git hash-object -t tree /dev/null)
+fi
+
+# If you want to allow non-ASCII filenames set this variable to true.
+allownonascii=$(git config --bool hooks.allownonascii)
+
+# Redirect output to stderr.
+exec 1>&2
+
+# Cross platform projects tend to avoid non-ASCII filenames; prevent
+# them from being added to the repository. We exploit the fact that the
+# printable range starts at the space character and ends with tilde.
+if [ "$allownonascii" != "true" ] &&
+        # Note that the use of brackets around a tr range is ok here, (it's
+        # even required, for portability to Solaris 10's /usr/bin/tr), since
+        # the square bracket bytes happen to fall in the designated range.
+        test $(git diff --cached --name-only --diff-filter=A -z $against |
+          LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
+then
+        cat <<\EOF
+Error: Attempt to add a non-ASCII file name.
+
+This can cause problems if you want to work with people on other platforms.
+
+To be portable it is advisable to rename the file.
+
+If you know what you are doing you can disable this check using:
+
+  git config hooks.allownonascii true
+EOF
+        exit 1
+fi
+
+# If there are whitespace errors, print the offending file names and fail.
+exec git diff-index --check --cached $against --
diff --git a/spec/fixtures/test.git/git/hooks/pre-push.sample b/spec/fixtures/test.git/git/hooks/pre-push.sample
new file mode 100755
index 0000000..6187dbf
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/pre-push.sample
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+# An example hook script to verify what is about to be pushed.  Called by "git
+# push" after it has checked the remote status, but before anything has been
+# pushed.  If this script exits with a non-zero status nothing will be pushed.
+#
+# This hook is called with the following parameters:
+#
+# $1 -- Name of the remote to which the push is being done
+# $2 -- URL to which the push is being done
+#
+# If pushing without using a named remote those arguments will be equal.
+#
+# Information about the commits which are being pushed is supplied as lines to
+# the standard input in the form:
+#
+#   <local ref> <local sha1> <remote ref> <remote sha1>
+#
+# This sample shows how to prevent push of commits where the log message starts
+# with "WIP" (work in progress).
+
+remote="$1"
+url="$2"
+
+z40=0000000000000000000000000000000000000000
+
+while read local_ref local_sha remote_ref remote_sha
+do
+        if [ "$local_sha" = $z40 ]
+        then
+                # Handle delete
+                :
+        else
+                if [ "$remote_sha" = $z40 ]
+                then
+                        # New branch, examine all commits
+                        range="$local_sha"
+                else
+                        # Update to existing branch, examine new commits
+                        range="$remote_sha..$local_sha"
+                fi
+
+                # Check for WIP commit
+                commit=`git rev-list -n 1 --grep '^WIP' "$range"`
+                if [ -n "$commit" ]
+                then
+                        echo >&2 "Found WIP commit in $local_ref, not pushing"
+                        exit 1
+                fi
+        fi
+done
+
+exit 0
diff --git a/spec/fixtures/test.git/git/hooks/pre-rebase.sample b/spec/fixtures/test.git/git/hooks/pre-rebase.sample
new file mode 100755
index 0000000..6cbef5c
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/pre-rebase.sample
@@ -0,0 +1,169 @@
+#!/bin/sh
+#
+# Copyright (c) 2006, 2008 Junio C Hamano
+#
+# The "pre-rebase" hook is run just before "git rebase" starts doing
+# its job, and can prevent the command from running by exiting with
+# non-zero status.
+#
+# The hook is called with the following parameters:
+#
+# $1 -- the upstream the series was forked from.
+# $2 -- the branch being rebased (or empty when rebasing the current branch).
+#
+# This sample shows how to prevent topic branches that are already
+# merged to 'next' branch from getting rebased, because allowing it
+# would result in rebasing already published history.
+
+publish=next
+basebranch="$1"
+if test "$#" = 2
+then
+        topic="refs/heads/$2"
+else
+        topic=`git symbolic-ref HEAD` ||
+        exit 0 ;# we do not interrupt rebasing detached HEAD
+fi
+
+case "$topic" in
+refs/heads/??/*)
+        ;;
+*)
+        exit 0 ;# we do not interrupt others.
+        ;;
+esac
+
+# Now we are dealing with a topic branch being rebased
+# on top of master.  Is it OK to rebase it?
+
+# Does the topic really exist?
+git show-ref -q "$topic" || {
+        echo >&2 "No such branch $topic"
+        exit 1
+}
+
+# Is topic fully merged to master?
+not_in_master=`git rev-list --pretty=oneline ^master "$topic"`
+if test -z "$not_in_master"
+then
+        echo >&2 "$topic is fully merged to master; better remove it."
+        exit 1 ;# we could allow it, but there is no point.
+fi
+
+# Is topic ever merged to next?  If so you should not be rebasing it.
+only_next_1=`git rev-list ^master "^$topic" ${publish} | sort`
+only_next_2=`git rev-list ^master           ${publish} | sort`
+if test "$only_next_1" = "$only_next_2"
+then
+        not_in_topic=`git rev-list "^$topic" master`
+        if test -z "$not_in_topic"
+        then
+                echo >&2 "$topic is already up to date with master"
+                exit 1 ;# we could allow it, but there is no point.
+        else
+                exit 0
+        fi
+else
+        not_in_next=`git rev-list --pretty=oneline ^${publish} "$topic"`
+        /usr/bin/perl -e '
+                my $topic = $ARGV[0];
+                my $msg = "* $topic has commits already merged to public branch:\n";
+                my (%not_in_next) = map {
+                        /^([0-9a-f]+) /;
+                        ($1 => 1);
+                } split(/\n/, $ARGV[1]);
+                for my $elem (map {
+                                /^([0-9a-f]+) (.*)$/;
+                                [$1 => $2];
+                        } split(/\n/, $ARGV[2])) {
+                        if (!exists $not_in_next{$elem->[0]}) {
+                                if ($msg) {
+                                        print STDERR $msg;
+                                        undef $msg;
+                                }
+                                print STDERR " $elem->[1]\n";
+                        }
+                }
+        ' "$topic" "$not_in_next" "$not_in_master"
+        exit 1
+fi
+
+<<\DOC_END
+
+This sample hook safeguards topic branches that have been
+published from being rewound.
+
+The workflow assumed here is:
+
+ * Once a topic branch forks from "master", "master" is never
+   merged into it again (either directly or indirectly).
+
+ * Once a topic branch is fully cooked and merged into "master",
+   it is deleted.  If you need to build on top of it to correct
+   earlier mistakes, a new topic branch is created by forking at
+   the tip of the "master".  This is not strictly necessary, but
+   it makes it easier to keep your history simple.
+
+ * Whenever you need to test or publish your changes to topic
+   branches, merge them into "next" branch.
+
+The script, being an example, hardcodes the publish branch name
+to be "next", but it is trivial to make it configurable via
+$GIT_DIR/config mechanism.
+
+With this workflow, you would want to know:
+
+(1) ... if a topic branch has ever been merged to "next".  Young
+    topic branches can have stupid mistakes you would rather
+    clean up before publishing, and things that have not been
+    merged into other branches can be easily rebased without
+    affecting other people.  But once it is published, you would
+    not want to rewind it.
+
+(2) ... if a topic branch has been fully merged to "master".
+    Then you can delete it.  More importantly, you should not
+    build on top of it -- other people may already want to
+    change things related to the topic as patches against your
+    "master", so if you need further changes, it is better to
+    fork the topic (perhaps with the same name) afresh from the
+    tip of "master".
+
+Let's look at this example:
+
+                   o---o---o---o---o---o---o---o---o---o "next"
+                  /       /           /           /
+                 /   a---a---b A     /           /
+                /   /               /           /
+               /   /   c---c---c---c B         /
+              /   /   /             \         /
+             /   /   /   b---b C     \       /
+            /   /   /   /             \     /
+    ---o---o---o---o---o---o---o---o---o---o---o "master"
+
+
+A, B and C are topic branches.
+
+ * A has one fix since it was merged up to "next".
+
+ * B has finished.  It has been fully merged up to "master" and "next",
+   and is ready to be deleted.
+
+ * C has not merged to "next" at all.
+
+We would want to allow C to be rebased, refuse A, and encourage
+B to be deleted.
+
+To compute (1):
+
+        git rev-list ^master ^topic next
+        git rev-list ^master        next
+
+        if these match, topic has not merged in next at all.
+
+To compute (2):
+
+        git rev-list master..topic
+
+        if this is empty, it is fully merged to "master".
+
+DOC_END
diff --git a/spec/fixtures/test.git/git/hooks/pre-receive.sample b/spec/fixtures/test.git/git/hooks/pre-receive.sample
new file mode 100755
index 0000000..a1fd29e
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/pre-receive.sample
@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# An example hook script to make use of push options.
+# The example simply echoes all push options that start with 'echoback='
+# and rejects all pushes when the "reject" push option is used.
+#
+# To enable this hook, rename this file to "pre-receive".
+
+if test -n "$GIT_PUSH_OPTION_COUNT"
+then
+        i=0
+        while test "$i" -lt "$GIT_PUSH_OPTION_COUNT"
+        do
+                eval "value=\$GIT_PUSH_OPTION_$i"
+                case "$value" in
+                echoback=*)
+                        echo "echo from the pre-receive-hook: ${value#*=}" >&2
+                        ;;
+                reject)
+                        exit 1
+                esac
+                i=$((i + 1))
+        done
+fi
diff --git a/spec/fixtures/test.git/git/hooks/prepare-commit-msg.sample b/spec/fixtures/test.git/git/hooks/prepare-commit-msg.sample
new file mode 100755
index 0000000..10fa14c
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/prepare-commit-msg.sample
@@ -0,0 +1,42 @@
+#!/bin/sh
+#
+# An example hook script to prepare the commit log message.
+# Called by "git commit" with the name of the file that has the
+# commit message, followed by the description of the commit
+# message's source.  The hook's purpose is to edit the commit
+# message file.  If the hook fails with a non-zero status,
+# the commit is aborted.
+#
+# To enable this hook, rename this file to "prepare-commit-msg".
+
+# This hook includes three examples. The first one removes the
+# "# Please enter the commit message..." help message.
+#
+# The second includes the output of "git diff --name-status -r"
+# into the message, just before the "git status" output.  It is
+# commented because it doesn't cope with --amend or with squashed
+# commits.
+#
+# The third example adds a Signed-off-by line to the message, that can
+# still be edited.  This is rarely a good idea.
+
+COMMIT_MSG_FILE=$1
+COMMIT_SOURCE=$2
+SHA1=$3
+
+/usr/bin/perl -i.bak -ne 'print unless(m/^. Please enter the commit message/..m/^#$/)' "$COMMIT_MSG_FILE"
+
+# case "$COMMIT_SOURCE,$SHA1" in
+#  ,|template,)
+#    /usr/bin/perl -i.bak -pe '
+#       print "\n" . `git diff --cached --name-status -r`
+#        if /^#/ && $first++ == 0' "$COMMIT_MSG_FILE" ;;
+#  *) ;;
+# esac
+
+# SOB=$(git var GIT_COMMITTER_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p')
+# git interpret-trailers --in-place --trailer "$SOB" "$COMMIT_MSG_FILE"
+# if test -z "$COMMIT_SOURCE"
+# then
+#   /usr/bin/perl -i.bak -pe 'print "\n" if !$first_line++' "$COMMIT_MSG_FILE"
+# fi
diff --git a/spec/fixtures/test.git/git/hooks/update.sample b/spec/fixtures/test.git/git/hooks/update.sample
new file mode 100755
index 0000000..80ba941
--- /dev/null
+++ b/spec/fixtures/test.git/git/hooks/update.sample
@@ -0,0 +1,128 @@
+#!/bin/sh
+#
+# An example hook script to block unannotated tags from entering.
+# Called by "git receive-pack" with arguments: refname sha1-old sha1-new
+#
+# To enable this hook, rename this file to "update".
+#
+# Config
+# ------
+# hooks.allowunannotated
+#   This boolean sets whether unannotated tags will be allowed into the
+#   repository.  By default they won't be.
+# hooks.allowdeletetag
+#   This boolean sets whether deleting tags will be allowed in the
+#   repository.  By default they won't be.
+# hooks.allowmodifytag
+#   This boolean sets whether a tag may be modified after creation. By default
+#   it won't be.
+# hooks.allowdeletebranch
+#   This boolean sets whether deleting branches will be allowed in the
+#   repository.  By default they won't be.
+# hooks.denycreatebranch
+#   This boolean sets whether remotely creating branches will be denied
+#   in the repository.  By default this is allowed.
+#
+
+# --- Command line
+refname="$1"
+oldrev="$2"
+newrev="$3"
+
+# --- Safety check
+if [ -z "$GIT_DIR" ]; then
+        echo "Don't run this script from the command line." >&2
+        echo " (if you want, you could supply GIT_DIR then run" >&2
+        echo "  $0 <ref> <oldrev> <newrev>)" >&2
+        exit 1
+fi
+
+if [ -z "$refname" -o -z "$oldrev" -o -z "$newrev" ]; then
+        echo "usage: $0 <ref> <oldrev> <newrev>" >&2
+        exit 1
+fi
+
+# --- Config
+allowunannotated=$(git config --bool hooks.allowunannotated)
+allowdeletebranch=$(git config --bool hooks.allowdeletebranch)
+denycreatebranch=$(git config --bool hooks.denycreatebranch)
+allowdeletetag=$(git config --bool hooks.allowdeletetag)
+allowmodifytag=$(git config --bool hooks.allowmodifytag)
+
+# check for no description
+projectdesc=$(sed -e '1q' "$GIT_DIR/description")
+case "$projectdesc" in
+"Unnamed repository"* | "")
+        echo "*** Project description file hasn't been set" >&2
+        exit 1
+        ;;
+esac
+
+# --- Check types
+# if $newrev is 0000...0000, it's a commit to delete a ref.
+zero="0000000000000000000000000000000000000000"
+if [ "$newrev" = "$zero" ]; then
+        newrev_type=delete
+else
+        newrev_type=$(git cat-file -t $newrev)
+fi
+
+case "$refname","$newrev_type" in
+        refs/tags/*,commit)
+                # un-annotated tag
+                short_refname=${refname##refs/tags/}
+                if [ "$allowunannotated" != "true" ]; then
+                        echo "*** The un-annotated tag, $short_refname, is not allowed in this repository" >&2
+                        echo "*** Use 'git tag [ -a | -s ]' for tags you want to propagate." >&2
+                        exit 1
+                fi
+                ;;
+        refs/tags/*,delete)
+                # delete tag
+                if [ "$allowdeletetag" != "true" ]; then
+                        echo "*** Deleting a tag is not allowed in this repository" >&2
+                        exit 1
+                fi
+                ;;
+        refs/tags/*,tag)
+                # annotated tag
+                if [ "$allowmodifytag" != "true" ] && git rev-parse $refname > /dev/null 2>&1
+                then
+                        echo "*** Tag '$refname' already exists." >&2
+                        echo "*** Modifying a tag is not allowed in this repository." >&2
+                        exit 1
+                fi
+                ;;
+        refs/heads/*,commit)
+                # branch
+                if [ "$oldrev" = "$zero" -a "$denycreatebranch" = "true" ]; then
+                        echo "*** Creating a branch is not allowed in this repository" >&2
+                        exit 1
+                fi
+                ;;
+        refs/heads/*,delete)
+                # delete branch
+                if [ "$allowdeletebranch" != "true" ]; then
+                        echo "*** Deleting a branch is not allowed in this repository" >&2
+                        exit 1
+                fi
+                ;;
+        refs/remotes/*,commit)
+                # tracking branch
+                ;;
+        refs/remotes/*,delete)
+                # delete tracking branch
+                if [ "$allowdeletebranch" != "true" ]; then
+                        echo "*** Deleting a tracking branch is not allowed in this repository" >&2
+                        exit 1
+                fi
+                ;;
+        *)
+                # Anything else (is there anything else?)
+                echo "*** Update hook: unknown type of update to ref $refname of type $newrev_type" >&2
+                exit 1
+                ;;
+esac
+
+# --- Finished
+exit 0
diff --git a/spec/fixtures/test.git/git/index b/spec/fixtures/test.git/git/index
index 0b50aa9..7117c7c 100644
--- a/spec/fixtures/test.git/git/index
+++ b/spec/fixtures/test.git/git/index
diff --git a/spec/fixtures/test.git/git/info/exclude b/spec/fixtures/test.git/git/info/exclude
new file mode 100644
index 0000000..a5196d1
--- /dev/null
+++ b/spec/fixtures/test.git/git/info/exclude
@@ -0,0 +1,6 @@
+# git ls-files --others --exclude-from=.git/info/exclude
+# Lines that start with '#' are comments.
+# For a project mostly in C, the following would be a good set of
+# exclude patterns (uncomment them if you want to use them):
+# *.[oa]
+# *~
diff --git a/spec/fixtures/test.git/git/logs/HEAD b/spec/fixtures/test.git/git/logs/HEAD
index a4f13f8..27f5b74 100644
--- a/spec/fixtures/test.git/git/logs/HEAD
+++ b/spec/fixtures/test.git/git/logs/HEAD
@@ -1,14 +1,3 @@
-0000000000000000000000000000000000000000 f37efccc1cef20309de28bfbdd16d0c4afb9d550 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1433058807 +0300     commit (initial): Initial commit
-f37efccc1cef20309de28bfbdd16d0c4afb9d550 f37efccc1cef20309de28bfbdd16d0c4afb9d550 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1433058814 +0300     checkout: moving from master to semicolon
-f37efccc1cef20309de28bfbdd16d0c4afb9d550 f7eb73cae47464f2d235a1d014c4617ad2aa0cb0 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1433058820 +0300     commit: Remove semicolon
-f7eb73cae47464f2d235a1d014c4617ad2aa0cb0 f37efccc1cef20309de28bfbdd16d0c4afb9d550 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456673968 +0200     checkout: moving from semicolon to master
-f37efccc1cef20309de28bfbdd16d0c4afb9d550 85e04b1eb1a721d42db51d49e49dfeb8255a5741 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456673985 +0200     commit (amend): Initial commit
-85e04b1eb1a721d42db51d49e49dfeb8255a5741 f7eb73cae47464f2d235a1d014c4617ad2aa0cb0 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456673990 +0200     checkout: moving from master to semicolon
-f7eb73cae47464f2d235a1d014c4617ad2aa0cb0 85e04b1eb1a721d42db51d49e49dfeb8255a5741 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456673992 +0200     rebase: checkout master
-85e04b1eb1a721d42db51d49e49dfeb8255a5741 e438134aac40ce86789d552f1bdada6582a987f6 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456673992 +0200     rebase: Remove semicolon
-e438134aac40ce86789d552f1bdada6582a987f6 e438134aac40ce86789d552f1bdada6582a987f6 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456673992 +0200     rebase finished: returning to refs/heads/semicolon
-e438134aac40ce86789d552f1bdada6582a987f6 85e04b1eb1a721d42db51d49e49dfeb8255a5741 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456674159 +0200     checkout: moving from semicolon to master
-85e04b1eb1a721d42db51d49e49dfeb8255a5741 931004157205727e6a47586feaed0473c6ddbd66 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456674164 +0200     commit (amend): Initial commit
-931004157205727e6a47586feaed0473c6ddbd66 931004157205727e6a47586feaed0473c6ddbd66 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456674177 +0200     checkout: moving from master to curly
-931004157205727e6a47586feaed0473c6ddbd66 3a6237c5feacca9a37c36bec5110a1eeb9da703b Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456674189 +0200     commit: Add a line of code that does not have the correct curlies (eslint)
-3a6237c5feacca9a37c36bec5110a1eeb9da703b 37018e429ad00f0ec961bd218e3dfa6a6e8cc05b Markus Doits <markus.doits@stellenticket.de> 1460316876 +0200 commit: add es6 file
+0000000000000000000000000000000000000000 08cc1f13f1d655a7353040edb359c7f3ab7f8bd4 Paul Bonaud <paul.bonaud@fretlink.com> 1555165913 +0200       commit (initial): Initial commit
+08cc1f13f1d655a7353040edb359c7f3ab7f8bd4 08cc1f13f1d655a7353040edb359c7f3ab7f8bd4 Paul Bonaud <paul.bonaud@fretlink.com> 1555165937 +0200       checkout: moving from master to hlint
+08cc1f13f1d655a7353040edb359c7f3ab7f8bd4 553b8ba14bc0100f71f0bbe45c7ad29a088f7c15 Paul Bonaud <paul.bonaud@fretlink.com> 1555165977 +0200       commit: Add hs files with hlint errors
diff --git a/spec/fixtures/test.git/git/logs/refs/heads/curly b/spec/fixtures/test.git/git/logs/refs/heads/curly
deleted file mode 100644
index 11582e5..0000000
--- a/spec/fixtures/test.git/git/logs/refs/heads/curly
+++ /dev/null
@@ -1,3 +0,0 @@
-0000000000000000000000000000000000000000 931004157205727e6a47586feaed0473c6ddbd66 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456674177 +0200     branch: Created from HEAD
-931004157205727e6a47586feaed0473c6ddbd66 3a6237c5feacca9a37c36bec5110a1eeb9da703b Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456674189 +0200     commit: Add a line of code that does not have the correct curlies (eslint)
-3a6237c5feacca9a37c36bec5110a1eeb9da703b 37018e429ad00f0ec961bd218e3dfa6a6e8cc05b Markus Doits <markus.doits@stellenticket.de> 1460316876 +0200 commit: add es6 file
diff --git a/spec/fixtures/test.git/git/logs/refs/heads/hlint b/spec/fixtures/test.git/git/logs/refs/heads/hlint
new file mode 100644
index 0000000..8ed043d
--- /dev/null
+++ b/spec/fixtures/test.git/git/logs/refs/heads/hlint
@@ -0,0 +1,2 @@
+0000000000000000000000000000000000000000 08cc1f13f1d655a7353040edb359c7f3ab7f8bd4 Paul Bonaud <paul.bonaud@fretlink.com> 1555165928 +0200       branch: Created from master
+08cc1f13f1d655a7353040edb359c7f3ab7f8bd4 553b8ba14bc0100f71f0bbe45c7ad29a088f7c15 Paul Bonaud <paul.bonaud@fretlink.com> 1555165977 +0200       commit: Add hs files with hlint errors
diff --git a/spec/fixtures/test.git/git/logs/refs/heads/master b/spec/fixtures/test.git/git/logs/refs/heads/master
index 752c737..4bcbe1d 100644
--- a/spec/fixtures/test.git/git/logs/refs/heads/master
+++ b/spec/fixtures/test.git/git/logs/refs/heads/master
@@ -1,3 +1 @@
-0000000000000000000000000000000000000000 f37efccc1cef20309de28bfbdd16d0c4afb9d550 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1433058807 +0300     commit (initial): Initial commit
-f37efccc1cef20309de28bfbdd16d0c4afb9d550 85e04b1eb1a721d42db51d49e49dfeb8255a5741 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456673985 +0200     commit (amend): Initial commit
-85e04b1eb1a721d42db51d49e49dfeb8255a5741 931004157205727e6a47586feaed0473c6ddbd66 Mindaugas Mozūras <mindaugas.mozuras@gmail.com> 1456674164 +0200     commit (amend): Initial commit
+0000000000000000000000000000000000000000 08cc1f13f1d655a7353040edb359c7f3ab7f8bd4 Paul Bonaud <paul.bonaud@fretlink.com> 1555165913 +0200       commit (initial): Initial commit
diff --git a/spec/fixtures/test.git/git/objects/01/d6dc2234bda69a289104ffdf9667363a2414bd b/spec/fixtures/test.git/git/objects/01/d6dc2234bda69a289104ffdf9667363a2414bd
deleted file mode 100644
index b4fe9ea..0000000
--- a/spec/fixtures/test.git/git/objects/01/d6dc2234bda69a289104ffdf9667363a2414bd
+++ /dev/null
@@ -1,2 +0,0 @@
-x
��A
-�0E]��d�ؘ���b2�`���L��[����>���i��v��p���v�\�i�=�>�CJ���Ǯ�$4O���)8�$f�i�>$��Z$�.�L��Т�i�+����e���8�h��tn*ð:+�EwYN`�
�
]�E�h��V�_�����A�U������61CW
\ No newline at end of file
diff --git a/spec/fixtures/test.git/git/objects/06/745b4cc11f505bdd1ecc84a744c3802729f92d b/spec/fixtures/test.git/git/objects/06/745b4cc11f505bdd1ecc84a744c3802729f92d
deleted file mode 100644
index d0554e9..0000000
--- a/spec/fixtures/test.git/git/objects/06/745b4cc11f505bdd1ecc84a744c3802729f92d
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/08/cc1f13f1d655a7353040edb359c7f3ab7f8bd4 b/spec/fixtures/test.git/git/objects/08/cc1f13f1d655a7353040edb359c7f3ab7f8bd4
new file mode 100644
index 0000000..597935d
--- /dev/null
+++ b/spec/fixtures/test.git/git/objects/08/cc1f13f1d655a7353040edb359c7f3ab7f8bd4
diff --git a/spec/fixtures/test.git/git/objects/22/2c064befc5a4f3192526863ce449c81bb74924 b/spec/fixtures/test.git/git/objects/22/2c064befc5a4f3192526863ce449c81bb74924
deleted file mode 100644
index 6fcbf2f..0000000
--- a/spec/fixtures/test.git/git/objects/22/2c064befc5a4f3192526863ce449c81bb74924
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/2d/1b9966feb19d665a9e5bb6a5bde410203a68f7 b/spec/fixtures/test.git/git/objects/2d/1b9966feb19d665a9e5bb6a5bde410203a68f7
deleted file mode 100644
index f5fbdc5..0000000
--- a/spec/fixtures/test.git/git/objects/2d/1b9966feb19d665a9e5bb6a5bde410203a68f7
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/37/018e429ad00f0ec961bd218e3dfa6a6e8cc05b b/spec/fixtures/test.git/git/objects/37/018e429ad00f0ec961bd218e3dfa6a6e8cc05b
deleted file mode 100644
index 1d5c313..0000000
--- a/spec/fixtures/test.git/git/objects/37/018e429ad00f0ec961bd218e3dfa6a6e8cc05b
+++ /dev/null
@@ -1 +0,0 @@
-x
��A� �aלb�&
 1ƅ[1���ZS�������o�<^�ylлtj���=,Z�lb����b��ť�i�}RZ����6���)Ѿ-fao�&#�S��[���\Vx���*ܗ�U��Gu�W��d�vs䗴���Cm
ƀpֽ֊��M�u�R�q�՗P�
\ No newline at end of file
diff --git a/spec/fixtures/test.git/git/objects/3a/6237c5feacca9a37c36bec5110a1eeb9da703b b/spec/fixtures/test.git/git/objects/3a/6237c5feacca9a37c36bec5110a1eeb9da703b
deleted file mode 100644
index a1399be..0000000
--- a/spec/fixtures/test.git/git/objects/3a/6237c5feacca9a37c36bec5110a1eeb9da703b
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/3a/efa89bfb08a4697dc441eed97005eb304364d8 b/spec/fixtures/test.git/git/objects/3a/efa89bfb08a4697dc441eed97005eb304364d8
deleted file mode 100644
index c8a6c16..0000000
--- a/spec/fixtures/test.git/git/objects/3a/efa89bfb08a4697dc441eed97005eb304364d8
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/45/2143142df8628483f4a2fd4a4bbff9e89ea7a6 b/spec/fixtures/test.git/git/objects/45/2143142df8628483f4a2fd4a4bbff9e89ea7a6
deleted file mode 100644
index 8a65f33..0000000
--- a/spec/fixtures/test.git/git/objects/45/2143142df8628483f4a2fd4a4bbff9e89ea7a6
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/55/3b8ba14bc0100f71f0bbe45c7ad29a088f7c15 b/spec/fixtures/test.git/git/objects/55/3b8ba14bc0100f71f0bbe45c7ad29a088f7c15
new file mode 100644
index 0000000..e5eac74
--- /dev/null
+++ b/spec/fixtures/test.git/git/objects/55/3b8ba14bc0100f71f0bbe45c7ad29a088f7c15
@@ -0,0 +1 @@
+x
��K��0g�S�>Z�[�$'����fl+�2s�19B���*�u�;D_�1�X���6��Bm���X�8x�Fg�P�b����h#�X���K2���ʨ�ѧ���u�G���kzÏ4�˼�^s]�A������\��ΟԽ�v�y���>�tv��j��?��R4
\ No newline at end of file
diff --git a/spec/fixtures/test.git/git/objects/76/0a0807c483b0f2b949acc9cc2ba8e37d4a7ff8 b/spec/fixtures/test.git/git/objects/76/0a0807c483b0f2b949acc9cc2ba8e37d4a7ff8
deleted file mode 100644
index 5175450..0000000
--- a/spec/fixtures/test.git/git/objects/76/0a0807c483b0f2b949acc9cc2ba8e37d4a7ff8
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/77/b5c76d003b18b78c41b86e36884ce49f40c259 b/spec/fixtures/test.git/git/objects/77/b5c76d003b18b78c41b86e36884ce49f40c259
deleted file mode 100644
index db2600a..0000000
--- a/spec/fixtures/test.git/git/objects/77/b5c76d003b18b78c41b86e36884ce49f40c259
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/85/e04b1eb1a721d42db51d49e49dfeb8255a5741 b/spec/fixtures/test.git/git/objects/85/e04b1eb1a721d42db51d49e49dfeb8255a5741
deleted file mode 100644
index 153bd31..0000000
--- a/spec/fixtures/test.git/git/objects/85/e04b1eb1a721d42db51d49e49dfeb8255a5741
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/92/35e9c88c2051d6949febe22fc942365a0b2546 b/spec/fixtures/test.git/git/objects/92/35e9c88c2051d6949febe22fc942365a0b2546
deleted file mode 100644
index 797ab27..0000000
--- a/spec/fixtures/test.git/git/objects/92/35e9c88c2051d6949febe22fc942365a0b2546
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/93/1004157205727e6a47586feaed0473c6ddbd66 b/spec/fixtures/test.git/git/objects/93/1004157205727e6a47586feaed0473c6ddbd66
deleted file mode 100644
index f017b1a..0000000
--- a/spec/fixtures/test.git/git/objects/93/1004157205727e6a47586feaed0473c6ddbd66
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/9f/c2abdd0895100b5876bc346dad6bbfb39e9324 b/spec/fixtures/test.git/git/objects/9f/c2abdd0895100b5876bc346dad6bbfb39e9324
deleted file mode 100644
index d5f9ef5..0000000
--- a/spec/fixtures/test.git/git/objects/9f/c2abdd0895100b5876bc346dad6bbfb39e9324
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/c8/0c26814ee76057a8493b791e6e1a623f693e97 b/spec/fixtures/test.git/git/objects/c8/0c26814ee76057a8493b791e6e1a623f693e97
new file mode 100644
index 0000000..fb02b57
--- /dev/null
+++ b/spec/fixtures/test.git/git/objects/c8/0c26814ee76057a8493b791e6e1a623f693e97
diff --git a/spec/fixtures/test.git/git/objects/cf/e8bc15022f8b4d3cea89bc20abb13f985feeb0 b/spec/fixtures/test.git/git/objects/cf/e8bc15022f8b4d3cea89bc20abb13f985feeb0
deleted file mode 100644
index b0bc9b3..0000000
--- a/spec/fixtures/test.git/git/objects/cf/e8bc15022f8b4d3cea89bc20abb13f985feeb0
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/d0/80b4f440e8a87be90677df855a139a36bd2dc3 b/spec/fixtures/test.git/git/objects/d0/80b4f440e8a87be90677df855a139a36bd2dc3
deleted file mode 100644
index 9d54c76..0000000
--- a/spec/fixtures/test.git/git/objects/d0/80b4f440e8a87be90677df855a139a36bd2dc3
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/objects/dd/e5c6b931572a74d0824ad8268e826ba18647b4 b/spec/fixtures/test.git/git/objects/dd/e5c6b931572a74d0824ad8268e826ba18647b4
new file mode 100644
index 0000000..0bff00b
--- /dev/null
+++ b/spec/fixtures/test.git/git/objects/dd/e5c6b931572a74d0824ad8268e826ba18647b4
diff --git a/spec/fixtures/test.git/git/objects/e4/38134aac40ce86789d552f1bdada6582a987f6 b/spec/fixtures/test.git/git/objects/e4/38134aac40ce86789d552f1bdada6582a987f6
deleted file mode 100644
index 37b8c14..0000000
--- a/spec/fixtures/test.git/git/objects/e4/38134aac40ce86789d552f1bdada6582a987f6
+++ /dev/null
@@ -1 +0,0 @@
-x
���i1FsV��4��j�7�K:���Y�VfW�[J�+����>�Ǘ[�s���G_E4�#�BC�xF�I�[f�)��^=�*Kׁ�`��l������,�e�
�"MhU��W[�u^J��q�����^�8�?v���t��8?��ճ�蜡��qƨA��.�j���c�т�R�R�K�&u�����)V�
\ No newline at end of file
diff --git a/spec/fixtures/test.git/git/objects/f3/7efccc1cef20309de28bfbdd16d0c4afb9d550 b/spec/fixtures/test.git/git/objects/f3/7efccc1cef20309de28bfbdd16d0c4afb9d550
deleted file mode 100644
index 1b07d10..0000000
--- a/spec/fixtures/test.git/git/objects/f3/7efccc1cef20309de28bfbdd16d0c4afb9d550
+++ /dev/null
@@ -1,3 +0,0 @@
-x
��K
-�0�a�Yŝ�&i�D�:�"n�����N�%���;pv�?Ǘ�S���n1��� �8�Sf���^
-ڹ�I�=��>�cZ�3=a,����q�?�r9�F�9SZ:_�x/%*cp�3JDִ=��-v_SM��7�>�CH�
\ No newline at end of file
diff --git a/spec/fixtures/test.git/git/objects/f6/e267486c6b9d0f50a690c894df5e981e31c1b0 b/spec/fixtures/test.git/git/objects/f6/e267486c6b9d0f50a690c894df5e981e31c1b0
new file mode 100644
index 0000000..8d9a177
--- /dev/null
+++ b/spec/fixtures/test.git/git/objects/f6/e267486c6b9d0f50a690c894df5e981e31c1b0
diff --git a/spec/fixtures/test.git/git/objects/f7/eb73cae47464f2d235a1d014c4617ad2aa0cb0 b/spec/fixtures/test.git/git/objects/f7/eb73cae47464f2d235a1d014c4617ad2aa0cb0
deleted file mode 100644
index 7fa950f..0000000
--- a/spec/fixtures/test.git/git/objects/f7/eb73cae47464f2d235a1d014c4617ad2aa0cb0
+++ /dev/null
diff --git a/spec/fixtures/test.git/git/refs/heads/curly b/spec/fixtures/test.git/git/refs/heads/curly
deleted file mode 100644
index 21919cd..0000000
--- a/spec/fixtures/test.git/git/refs/heads/curly
+++ /dev/null
@@ -1 +0,0 @@
-37018e429ad00f0ec961bd218e3dfa6a6e8cc05b
diff --git a/spec/fixtures/test.git/git/refs/heads/hlint b/spec/fixtures/test.git/git/refs/heads/hlint
new file mode 100644
index 0000000..a27bfd1
--- /dev/null
+++ b/spec/fixtures/test.git/git/refs/heads/hlint
@@ -0,0 +1 @@
+553b8ba14bc0100f71f0bbe45c7ad29a088f7c15
diff --git a/spec/fixtures/test.git/git/refs/heads/master b/spec/fixtures/test.git/git/refs/heads/master
index 0cccce0..5a8fedf 100644
--- a/spec/fixtures/test.git/git/refs/heads/master
+++ b/spec/fixtures/test.git/git/refs/heads/master
@@ -1 +1 @@
-931004157205727e6a47586feaed0473c6ddbd66
+08cc1f13f1d655a7353040edb359c7f3ab7f8bd4
diff --git a/spec/fixtures/test.git/hello.js b/spec/fixtures/test.git/hello.js
deleted file mode 100644
index 6ad633d..0000000
--- a/spec/fixtures/test.git/hello.js
+++ /dev/null
@@ -1,7 +0,0 @@
-function HelloWorld(name)
-{
-    if (foo) foo++;
-    alert(name);
-}
-
-function Empty() {}
diff --git a/spec/fixtures/test.git/pronto.hs b/spec/fixtures/test.git/pronto.hs
new file mode 100644
index 0000000..dde5c6b
--- /dev/null
+++ b/spec/fixtures/test.git/pronto.hs
@@ -0,0 +1,11 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Pronto
+  (
+    sayHello
+  ) where
+
+import           Data.Text (Text)
+
+sayHello :: Text -> String
+sayHello text = show $ text
diff --git a/spec/fixtures/test.git/world.es6 b/spec/fixtures/test.git/world.es6
deleted file mode 100644
index 2d1b996..0000000
--- a/spec/fixtures/test.git/world.es6
+++ /dev/null
@@ -1,5 +0,0 @@
-function HelloWorld(name)
-{
-    if (foo) foo++;
-    alert(name);
-}
diff --git a/spec/pronto/eslint_spec.rb b/spec/pronto/eslint_spec.rb
deleted file mode 100644
index 0924f30..0000000
--- a/spec/pronto/eslint_spec.rb
+++ /dev/null
@@ -1,163 +0,0 @@
-# frozen_string_literal: true
-
-require 'spec_helper'
-
-module Pronto
-  describe ESLintNpm do
-    let(:eslint) { ESLintNpm.new(patches) }
-    let(:patches) { [] }
-
-    describe '#run' do
-      subject(:run) { eslint.run }
-
-      context 'patches are nil' do
-        let(:patches) { nil }
-
-        it 'returns an empty array' do
-          expect(run).to eql([])
-        end
-      end
-
-      context 'no patches' do
-        let(:patches) { [] }
-
-        it 'returns an empty array' do
-          expect(run).to eql([])
-        end
-      end
-
-      context 'patches with a one and a four warnings' do
-        include_context 'test repo'
-
-        let(:patches) { repo.diff('master') }
-
-        it 'returns correct number of errors' do
-          expect(run.count).to eql(5)
-        end
-
-        it 'has correct first message' do
-          expect(run.first.msg).to eql("'foo' is not defined.")
-        end
-
-        context(
-          'with files to lint config that never matches',
-          config: { 'files_to_lint' => 'will never match' }
-        ) do
-          it 'returns zero errors' do
-            expect(run.count).to eql(0)
-          end
-        end
-
-        context(
-          'with files to lint config that matches only .js',
-          config: { 'files_to_lint' => '\.js$' }
-        ) do
-          it 'returns correct amount of errors' do
-            expect(run.count).to eql(2)
-          end
-        end
-
-        context(
-          'with cmd_line_opts to include .html',
-          config: { 'cmd_line_opts' => '--ext .html' }
-        ) do
-          it 'returns correct number of errors' do
-            expect(run.count).to eql 5
-          end
-        end
-
-        context(
-          'with different eslint executable',
-          config: { 'eslint_executable' => './custom_eslint.sh' }
-        ) do
-          it 'calls the custom eslint eslint_executable' do
-            expect { run }.to raise_error(JSON::ParserError, /custom eslint called/)
-          end
-        end
-      end
-
-      context 'repo with ignored and not ignored file, each with three warnings' do
-        include_context 'eslintignore repo'
-
-        let(:patches) { repo.diff('master') }
-
-        it 'returns correct number of errors' do
-          expect(run.count).to eql(3)
-        end
-
-        it 'has correct first message' do
-          expect(run.first.msg).to eql("'HelloWorld' is defined but never used.")
-        end
-      end
-    end
-
-    describe '#files_to_lint' do
-      subject(:files_to_lint) { eslint.files_to_lint }
-
-      it 'matches .js by default' do
-        expect(files_to_lint).to match('my_js.js')
-      end
-
-      it 'matches .es6 by default' do
-        expect(files_to_lint).to match('my_js.es6')
-      end
-    end
-
-    describe '#eslint_executable' do
-      subject(:eslint_executable) { eslint.eslint_executable }
-
-      it 'is `eslint` by default' do
-        expect(eslint_executable).to eql('eslint')
-      end
-
-      context(
-        'with different eslint executable config',
-        config: { 'eslint_executable' => 'custom_eslint' }
-      ) do
-        it 'is correct' do
-          eslint.read_config
-          expect(eslint_executable).to eql('custom_eslint')
-        end
-      end
-    end
-
-    describe '#eslint_command_line' do
-      subject(:eslint_command_line) { eslint.send(:eslint_command_line, path) }
-      let(:path) { '/some/path.rb' }
-
-      it 'adds json output flag' do
-        expect(eslint_command_line).to include('-f json')
-      end
-
-      it 'adds path' do
-        expect(eslint_command_line).to include(path)
-      end
-
-      it 'starts with eslint executable' do
-        expect(eslint_command_line).to start_with(eslint.eslint_executable)
-      end
-
-      context 'with path that should be escaped' do
-        let(:path) { '/must be/$escaped' }
-
-        it 'escapes the path correctly' do
-          expect(eslint_command_line).to include('/must\\ be/\\$escaped')
-        end
-
-        it 'does not include unescaped path' do
-          expect(eslint_command_line).not_to include(path)
-        end
-      end
-      
-      context(
-        'with some command line options',
-        config: { 'cmd_line_opts' => '--my command --line opts' }
-      ) do
-        it 'includes the custom command line options' do
-          eslint.read_config
-          expect(eslint_command_line).to include('--my command --line opts')
-        end
-      end
-    end
-  end
-end
diff --git a/spec/pronto/hlint_spec.rb b/spec/pronto/hlint_spec.rb
new file mode 100644
index 0000000..fdabab5
--- /dev/null
+++ b/spec/pronto/hlint_spec.rb
@@ -0,0 +1,138 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+module Pronto
+  module Hlint
+    describe Runner do
+      let(:hlint) { Hlint::Runner.new(patches) }
+      let(:patches) { [] }
+
+      describe '#run' do
+        subject(:run) { hlint.run }
+
+        context 'patches are nil' do
+          let(:patches) { nil }
+
+          it 'returns an empty array' do
+            expect(run).to eql([])
+          end
+        end
+
+        context 'no patches' do
+          let(:patches) { [] }
+
+          it 'returns an empty array' do
+            expect(run).to eql([])
+          end
+        end
+
+        context 'patches with a one and a four warnings' do
+          include_context 'test repo'
+
+          let(:patches) { repo.diff('master') }
+
+          it 'returns correct number of errors' do
+            expect(run.count).to eql(3)
+          end
+
+          it 'has correct first message' do
+            expect(run.first.msg).to match("Unused LANGUAGE pragma")
+          end
+
+          context(
+            'with files to lint config that never matches',
+            config: { 'files_to_lint' => 'will never match' }
+          ) do
+            it 'returns zero errors' do
+              expect(run.count).to eql(0)
+            end
+          end
+
+          context(
+            'with files to lint config that matches only .lhs',
+            config: { 'files_to_lint' => '\.lhs$' }
+          ) do
+            it 'returns correct amount of errors' do
+              expect(run.count).to eql(0)
+            end
+          end
+
+          context(
+            'with different hlint executable',
+            config: { 'hlint_executable' => './custom_hlint.sh' }
+          ) do
+            it 'calls the custom hlint hlint_executable' do
+              expect { run }.to raise_error(JSON::ParserError, /hlint called!/)
+            end
+          end
+        end
+      end
+
+      describe '#files_to_lint' do
+        subject(:files_to_lint) { hlint.files_to_lint }
+
+        it 'matches .he by default' do
+          expect(files_to_lint).to match('Types.hs')
+        end
+      end
+
+      describe '#hlint_executable' do
+        subject(:hlint_executable) { hlint.hlint_executable }
+
+        it 'is `hlint` by default' do
+          expect(hlint_executable).to eql('hlint')
+        end
+
+        context(
+          'with different hlint executable config',
+          config: { 'hlint_executable' => 'custom_hlint' }
+        ) do
+          it 'is correct' do
+            hlint.read_config
+            expect(hlint_executable).to eql('custom_hlint')
+          end
+        end
+      end
+
+      describe '#hlint_command_line' do
+        subject(:hlint_command_line) { hlint.send(:hlint_command_line, path) }
+        let(:path) { '/some/path.rb' }
+
+        it 'adds json output flag' do
+          expect(hlint_command_line).to include('--json')
+        end
+
+        it 'adds path' do
+          expect(hlint_command_line).to include(path)
+        end
+
+        it 'starts with hlint executable' do
+          expect(hlint_command_line).to start_with(hlint.hlint_executable)
+        end
+
+        context 'with path that should be escaped' do
+          let(:path) { '/must be/$escaped' }
+
+          it 'escapes the path correctly' do
+            expect(hlint_command_line).to include('/must\\ be/\\$escaped')
+          end
+
+          it 'does not include unescaped path' do
+            expect(hlint_command_line).not_to include(path)
+          end
+        end
+
+        context(
+          'with some command line options',
+          config: { 'cmd_line_opts' => '--my command --line opts' }
+        ) do
+          it 'includes the custom command line options' do
+            hlint.read_config
+            expect(hlint_command_line).to include('--my command --line opts')
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index e147ea7..656e116 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,11 +1,10 @@
 # frozen_string_literal: true
 
 require 'fileutils'
-require 'byebug'
 require 'rspec'
-require 'pronto/eslint_npm'
+require 'pronto/hlint'
 
-%w[test eslintignore].each do |repo_name|
+%w[test].each do |repo_name|
   RSpec.shared_context "#{repo_name} repo" do
     let(:git) { "spec/fixtures/#{repo_name}.git/git" }
     let(:dot_git) { "spec/fixtures/#{repo_name}.git/.git" }
@@ -20,9 +19,9 @@ RSpec.shared_context 'with config', config: true do
   requested_config = metadata[:config]
 
   before(:each) do
-    allow_any_instance_of(Pronto::ESLintNpm).to receive(:config_options).and_return(requested_config)
+    allow_any_instance_of(Pronto::Hlint::Runner).to receive(:config_options).and_return(requested_config)
 
     # make sure the config is actually read in the example
-    expect_any_instance_of(Pronto::ESLintNpm).to receive(:read_config).and_call_original
+    expect_any_instance_of(Pronto::Hlint::Runner).to receive(:read_config).and_call_original
   end
 end