feat: add subpackage git-obs-hooks-script-convert-changes

Add subpackage with a working script, which causes `git commit`
to generate default commit message based on the last record in
the `*.changes` file.

Author: mcepl

git-obs-hooks.spec

@@ -7,10 +7,11 @@ Group:          Development/Tools/Other
 URL:            https://github.com/dmach/git-obs-hooks
 Source:         https://github.com/dmach/git-obs-hooks/archive/refs/tags/%{version}.tar.gz#/%{name}-%{version}.tar.gz
 
+BuildRequires:  fdupes
 BuildArch:      noarch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
-%define hook_dir %{_datarootdir}/git-obs-hooks
+%define hook_dir %{_datadir}/git-obs-hooks
 
 %description
 Framework for running git hooks in git-obs and osc.
@@ -22,9 +23,21 @@ To enable git-obs-hooks in the current git repo, run: install-git-obs-hooks
 
 See githooks(5) man page for more help on the hooks.
 
+%package script-convert-changes
+Summary: working script for %{name} converting last record of *.changes to git commit
+Requires: %{name} = %{version}
+
+%description script-convert-changes
+Working script for %{name}, which causes `git commit` to generate
+default commit message based on the last last record in the
+`*.changes`.
+
 %prep
 %autosetup -p1
 
+%build
+:
+
 %install
 install -D install-git-obs-hooks %{buildroot}%{_bindir}/install-git-obs-hooks
 
@@ -70,6 +83,12 @@ install -D git-obs-hook-template %{buildroot}%{hook_dir}/sendemail-validate
 install -d %{buildroot}%{hook_dir}/update.d
 install -D git-obs-hook-template %{buildroot}%{hook_dir}/update
 
+for scriptlet in scripts/*/*.sh ; do
+    cp -p "${scriptlet}" "%{buildroot}%{hook_dir}/${scriptlet#*/}"
+done
+
+%fdupes %{buildroot}%{hook_dir}
+
 %files
 %defattr(-,root,root,-)
 %attr(0755, root, root) %{_bindir}/install-git-obs-hooks
@@ -92,4 +111,7 @@ install -D git-obs-hook-template %{buildroot}%{hook_dir}/update
 %license LICENSE
 %doc README.md
 
+%files script-convert-changes
+%{hook_dir}/prepare-commit-msg.d
+
 %changelog

scripts/prepare-commit-msg.d/convert-changes.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+set -e
+
+COMMIT_MSG_FILE="$1"
+COMMIT_SOURCE="$2"
+SHA1="${3:-HEAD}"
+
+# {
+# 	printf "COMMIT_MSG_FILE: %s\n" "$COMMIT_MSG_FILE" >>/tmp/prepare-commit-msg-log.txt
+# 	printf "COMMIT_SOURCE: %s\n" "$COMMIT_SOURCE" >>/tmp/prepare-commit-msg-log.txt
+# 	printf "SHA1: %s\n" "$SHA1" >>/tmp/prepare-commit-msg-log.txt
+# 	printf "\n"
+# } >>/tmp/prepare-commit-msg-log.txt
+
+if test -z "$COMMIT_SOURCE"; then
+  if ! git add -- *.changes; then
+    echo "Error: Failed to add *.changes files." >&2
+    exit 1
+  fi
+
+  diff=$(git diff --no-color "$SHA1" -- *.changes \
+         | sed -E -n -e '/^\+[^+]/s/^\+//p' \
+         | sed -e '/^-\{4,\}/,+1d' \
+         | sed -e 's/^- *//')
+
+  if test -n "$diff"
+  then  # Check if diff is not empty
+    TEMP_COMMIT_MSG=$(mktemp /tmp/moddiff.XXXXXX.msg)
+    trap 'rm -f $TEMP_COMMIT_MSG' EXIT
+    printf "%s\n" "$diff" >"$TEMP_COMMIT_MSG"
+    cat "$COMMIT_MSG_FILE" >>"$TEMP_COMMIT_MSG"
+    mv "$TEMP_COMMIT_MSG" "$COMMIT_MSG_FILE"
+  fi
+fi