From 2130ed48ceb0db955b942b942bac82a5b6aee57b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Isma=C3=ABl=20Bouya?= <ismael.bouya@normalesup.org>
Date: Mon, 10 Feb 2020 17:00:59 +0100
Subject: Add neomutt patch for empty mailboxes

---
 overlays/neomutt/commands.patch | 87 +++++++++++++++++++++++++++++++++++++++++
 overlays/neomutt/default.nix    |  1 +
 2 files changed, 88 insertions(+)
 create mode 100644 overlays/neomutt/commands.patch

diff --git a/overlays/neomutt/commands.patch b/overlays/neomutt/commands.patch
new file mode 100644
index 00000000..6c910cfb
--- /dev/null
+++ b/overlays/neomutt/commands.patch
@@ -0,0 +1,87 @@
+commit 763056828abe9716c4dfce754a47d8ecdefb3029
+Author: Ismaël Bouya <ismael.bouya@normalesup.org>
+Date:   Mon Feb 10 16:13:33 2020 +0100
+
+    Fix commands that don’t need to have a non-empty mailbox to be valid
+    
+    Some commands act on the whole mailbox (tag-pattern, delete-pattern,
+    search), and even though they don’t do anything when the mailbox is
+    empty, there is no reason to fail when it happens. This commit removes
+    the check that the mailbox is non-empty before doing said actions.
+
+diff --git a/index.c b/index.c
+index 0f4b9f99f..0adfc19f1 100644
+--- a/index.c
++++ b/index.c
+@@ -1642,7 +1642,7 @@ int mutt_index_menu(struct MuttWindow *dlg)
+       case OP_JUMP:
+       {
+         int msg_num = 0;
+-        if (!prereq(Context, menu, CHECK_IN_MAILBOX | CHECK_MSGCOUNT | CHECK_VISIBLE))
++        if (!prereq(Context, menu, CHECK_IN_MAILBOX))
+           break;
+         if (isdigit(LastKey))
+           mutt_unget_event(LastKey, 0);
+@@ -1687,7 +1687,7 @@ int mutt_index_menu(struct MuttWindow *dlg)
+ 
+       case OP_MAIN_DELETE_PATTERN:
+         if (!prereq(Context, menu,
+-                    CHECK_IN_MAILBOX | CHECK_MSGCOUNT | CHECK_VISIBLE | CHECK_READONLY | CHECK_ATTACH))
++                    CHECK_IN_MAILBOX | CHECK_READONLY | CHECK_ATTACH))
+         {
+           break;
+         }
+@@ -1852,12 +1852,17 @@ int mutt_index_menu(struct MuttWindow *dlg)
+         menu->redraw = REDRAW_FULL;
+         break;
+ 
+-      case OP_SEARCH:
++      // Initiating a search can happen on an empty mailbox, but
++      // searching for next/previous/... needs to be on a message and
++      // thus a non-empty mailbox
+       case OP_SEARCH_REVERSE:
+       case OP_SEARCH_NEXT:
+       case OP_SEARCH_OPPOSITE:
+         if (!prereq(Context, menu, CHECK_IN_MAILBOX | CHECK_MSGCOUNT | CHECK_VISIBLE))
+           break;
++      case OP_SEARCH:
++        if (!prereq(Context, menu, CHECK_IN_MAILBOX))
++          break;
+         menu->current = mutt_search_command(menu->current, op);
+         if (menu->current == -1)
+           menu->current = menu->oldcurrent;
+@@ -1926,14 +1931,14 @@ int mutt_index_menu(struct MuttWindow *dlg)
+       }
+ 
+       case OP_MAIN_TAG_PATTERN:
+-        if (!prereq(Context, menu, CHECK_IN_MAILBOX | CHECK_MSGCOUNT | CHECK_VISIBLE))
++        if (!prereq(Context, menu, CHECK_IN_MAILBOX))
+           break;
+         mutt_pattern_func(MUTT_TAG, _("Tag messages matching: "));
+         menu->redraw |= REDRAW_INDEX | REDRAW_STATUS;
+         break;
+ 
+       case OP_MAIN_UNDELETE_PATTERN:
+-        if (!prereq(Context, menu, CHECK_IN_MAILBOX | CHECK_MSGCOUNT | CHECK_VISIBLE | CHECK_READONLY))
++        if (!prereq(Context, menu, CHECK_IN_MAILBOX | CHECK_READONLY))
+           break;
+         /* L10N: CHECK_ACL */
+         /* L10N: Due to the implementation details we do not know whether we
+@@ -1950,7 +1955,7 @@ int mutt_index_menu(struct MuttWindow *dlg)
+         break;
+ 
+       case OP_MAIN_UNTAG_PATTERN:
+-        if (!prereq(Context, menu, CHECK_IN_MAILBOX | CHECK_MSGCOUNT | CHECK_VISIBLE))
++        if (!prereq(Context, menu, CHECK_IN_MAILBOX))
+           break;
+         if (mutt_pattern_func(MUTT_UNTAG, _("Untag messages matching: ")) == 0)
+           menu->redraw |= REDRAW_INDEX | REDRAW_STATUS;
+@@ -3189,7 +3194,7 @@ int mutt_index_menu(struct MuttWindow *dlg)
+       }
+ 
+       case OP_MAIN_COLLAPSE_ALL:
+-        if (!prereq(Context, menu, CHECK_IN_MAILBOX | CHECK_MSGCOUNT | CHECK_VISIBLE))
++        if (!prereq(Context, menu, CHECK_IN_MAILBOX))
+           break;
+ 
+         if ((C_Sort & SORT_MASK) != SORT_THREADS)
diff --git a/overlays/neomutt/default.nix b/overlays/neomutt/default.nix
index ec563e28..0b237342 100644
--- a/overlays/neomutt/default.nix
+++ b/overlays/neomutt/default.nix
@@ -9,6 +9,7 @@ self: super: {
         rev = version;
         sha256 = "16xr7wdmjw0i72xbnyyh098wx4cr0m8w2cr1szdi1b14p4kpgr67";
       };
+      patches = old.patches or [] ++ [ ./commands.patch ];
       buildInputs = old.buildInputs ++ [ self.gdbm ];
       configureFlags = old.configureFlags ++ [ "--gdbm" ];
       doCheck = false;
-- 
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