From 9f5da6d7e9dbde93330f8c69ccdee9fac643696e Mon Sep 17 00:00:00 2001
From: =?utf8?q?Isma=C3=ABl=20Bouya?= <ismael.bouya@normalesup.org>
Date: Fri, 1 Feb 2019 11:06:44 +0100
Subject: [PATCH] Add setup script

---
 nixops/scripts/nixops_wrap |  6 +--
 nixops/scripts/setup       | 82 ++++++++++++++++++++++++++++++++++++++
 nixops/ssh/config          |  5 +++
 3 files changed, 90 insertions(+), 3 deletions(-)
 create mode 100755 nixops/scripts/setup
 create mode 100644 nixops/ssh/config

diff --git a/nixops/scripts/nixops_wrap b/nixops/scripts/nixops_wrap
index c23d308..1efe8a9 100755
--- a/nixops/scripts/nixops_wrap
+++ b/nixops/scripts/nixops_wrap
@@ -1,7 +1,7 @@
 #!/bin/bash
 
-if [ -z "$NIXOPS_CONFIG_PASS_PATH" ]; then
-  echo "Please set NIXOPS_CONFIG_PASS_PATH to the password-store environment file path"
+if [ -z "$NIXOPS_CONFIG_PASS_SUBTREE_PATH" ]; then
+  echo "Please set NIXOPS_CONFIG_PASS_SUBTREE_PATH to the password-store subtree path"
   exit 1;
 fi
 
@@ -15,7 +15,7 @@ finish() {
 
 trap finish EXIT
 
-pass show "$NIXOPS_CONFIG_PASS_PATH" >> $TEMP
+pass show "$NIXOPS_CONFIG_PASS_SUBTREE_PATH/NixConfig" >> $TEMP
 nixops set-args --argstr environment "$TEMP"
 
 nixops "$@"
diff --git a/nixops/scripts/setup b/nixops/scripts/setup
new file mode 100755
index 0000000..ff20fc9
--- /dev/null
+++ b/nixops/scripts/setup
@@ -0,0 +1,82 @@
+#!/bin/bash
+
+RemoteRepo="gitolite@git.immae.eu:perso/Immae/Prive/Password_store/Mes_Sites/Paul"
+
+if [ -z "$NIXOPS_CONFIG_PASS_SUBTREE_REMOTE" \
+    -o -z "$NIXOPS_CONFIG_PASS_SUBTREE_PATH" ]; then
+  cat <<-EOF
+Two environment variables are needed to setup the password store:
+NIXOPS_CONFIG_PASS_SUBTREE_PATH : path where the subtree will be imported
+NIXOPS_CONFIG_PASS_SUBTREE_REMOTE : remote name to give to the repository
+EOF
+  exit 1
+fi
+
+if ! pass $NIXOPS_CONFIG_PASS_SUBTREE_PATH > /dev/null 2>/dev/null; then
+  cat <<-EOF
+/!\ This will modify your password store to add and import a subtree
+with the specific passwords files. Choose a path that doesn’t exist
+yet in your password store.
+> pass git remote add $NIXOPS_CONFIG_PASS_SUBTREE_REMOTE $RemoteRepo
+> pass git subtree add --prefix=$NIXOPS_CONFIG_PASS_SUBTREE_PATH $NIXOPS_CONFIG_PASS_SUBTREE_REMOTE master
+Later, you can use pull_environment and push_environment scripts to
+update the passwords when needed
+Continue? [y/N]
+EOF
+  read y
+  if [ "$y" = "y" -o "$y" = "Y" ]; then
+    pass git remote add $NIXOPS_CONFIG_PASS_SUBTREE_REMOTE $RemoteRepo
+    pass git subtree add --prefix=$NIXOPS_CONFIG_PASS_SUBTREE_PATH $NIXOPS_CONFIG_PASS_SUBTREE_REMOTE master
+  else
+    echo "Aborting"
+    exit 1
+  fi
+fi
+
+if [ ! -f /etc/ssh/ssh_rsa_key_nixops ]; then
+  cat <<EOF
+The key to access private git repositories (websites hosted by the
+server) needs to be accessible to nix builders. It will be put in
+/etc/ssh/ssh_rsa_key_nixops (sudo right is needed for that)
+> pass show $NIXOPS_CONFIG_PASS_SUBTREE_PATH/NixSshKey | sudo tee /etc/ssh/ssh_rsa_key_nixops > /dev/null
+> pass show $NIXOPS_CONFIG_PASS_SUBTREE_PATH/NixSshKey.pub | sudo tee /etc/ssh/ssh_rsa_key_nixops.pub > /dev/null
+> sudo chmod u=r,go-rwx /etc/ssh/ssh_rsa_key_nixops
+> sudo chown nixbld1:nixbld /etc/ssh/ssh_rsa_key_nixops /etc/ssh/ssh_rsa_key_nixops.pub
+Continue? [y/N]
+EOF
+  read y
+  if [ "$y" = "y" -o "$y" = "Y" ]; then
+    if ! id -u nixbld1 2>/dev/null >/dev/null; then
+      echo "User nixbld1 seems inexistant, did you install nix?"
+      exit 1
+    fi
+    mask=$(umask)
+    umask 0777
+    # Don’t forward it directly to tee, it would break ncurse pinentry
+    key=$(pass show $NIXOPS_CONFIG_PASS_SUBTREE_PATH/NixSshKey)
+    echo "$key" | sudo tee /etc/ssh/ssh_rsa_key_nixops > /dev/null
+    sudo chmod u=r,go=- /etc/ssh/ssh_rsa_key_nixops
+    pubkey=$(pass show $NIXOPS_CONFIG_PASS_SUBTREE_PATH/NixSshKey.pub)
+    echo "$pubkey" | sudo tee /etc/ssh/ssh_rsa_key_nixops.pub > /dev/null
+    sudo chmod a=r /etc/ssh/ssh_rsa_key_nixops.pub
+    sudo chown nixbld1:nixbld /etc/ssh/ssh_rsa_key_nixops /etc/ssh/ssh_rsa_key_nixops.pub
+    umask $mask
+  else
+    echo "Aborting"
+    exit 1
+  fi
+fi
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+nix_config="ssh-config-file=$(dirname $DIR)/ssh/config"
+if echo "$NIX_PATH" | grep -q "$nix_config"; then
+  cat <<EOF
+All set up
+EOF
+else
+cat <<EOF
+All set up, please add
+ssh-config-file=$(dirname $DIR)/ssh/config
+to your NIX_PATH environment variable (colon-separated)
+EOF
+fi
diff --git a/nixops/ssh/config b/nixops/ssh/config
new file mode 100644
index 0000000..3d4dc3e
--- /dev/null
+++ b/nixops/ssh/config
@@ -0,0 +1,5 @@
+Host git.immae.eu
+IdentityFile /etc/ssh/ssh_rsa_key_nixops
+StrictHostKeyChecking no
+UserKnownHostsFile /dev/null
+CheckHostIP no
-- 
2.41.0