tests: add some tests for makepkg

This adds some git source related regression tests for #142 and #143.
Creates temporary git repos and PKGBUILDs and builds packages.

This requires git to be available and since makepkg refuses to be
run as root, the tests fail if run as root.

meson.build

@@ -458,6 +458,7 @@ TEST_ENV.set('PMTEST_SCRIPT_DIR', join_paths(meson.project_build_root(), 'script
 subdir('test/pacman')
 subdir('test/scripts')
 subdir('test/util')
+subdir('test/makepkg')
 
 message('\n    '.join([
   '@0@ @1@'.format(meson.project_name(), meson.project_version()),

test/makepkg/makepkg-build-git-head-twice.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/bash
+
+set -e
+
+tempdir=$(mktemp -d)
+cleanup() { rm -rf "$tempdir"; }
+trap cleanup EXIT
+
+export MAKEPKG_LIBRARY="${PMTEST_LIBMAKEPKG_DIR}"
+export MAKEPKG_CONF="${PMTEST_UTIL_DIR}/makepkg.conf"
+export PACMAN="${PMTEST_UTIL_DIR}/pacman"
+MAKEPKG="${PMTEST_SCRIPT_DIR}/makepkg"
+
+# https://gitlab.archlinux.org/pacman/pacman/-/issues/142
+# Running makepkg twice if the source is git without a fragment
+# should not fail.
+test() {
+	# Dummy git repo
+	export GIT_COMMITTER_NAME="Test User"
+	export GIT_COMMITTER_EMAIL="test@example.com"
+	export GIT_AUTHOR_NAME="$GIT_COMMITTER_NAME"
+	export GIT_AUTHOR_EMAIL="$GIT_COMMITTER_EMAIL"
+	local gitrepo="$tempdir/gitrepo"
+	mkdir -p $gitrepo && cd $gitrepo
+	git init .
+	git checkout -b main
+	git commit --allow-empty -m "test"
+
+	# Dummy PKGBUILD
+	local pkgbuild_content=$(cat <<EOF
+pkgname=test
+pkgver=1
+pkgrel=1
+arch=('any')
+source=(git+file://$gitrepo)
+sha256sums=('SKIP')
+EOF
+)
+
+	local pkgdir="$tempdir/pkgdir"
+	mkdir -p "$pkgdir" && cd "$pkgdir"
+	echo "$pkgbuild_content" > "PKGBUILD"
+
+	"$MAKEPKG"
+	"$MAKEPKG" -f
+}
+
+test;

test/makepkg/makepkg-checkout-dir-matches-branch.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/bash
+
+set -e
+
+tempdir=$(mktemp -d)
+cleanup() { rm -rf "$tempdir"; }
+trap cleanup EXIT
+
+export MAKEPKG_LIBRARY="${PMTEST_LIBMAKEPKG_DIR}"
+export MAKEPKG_CONF="${PMTEST_UTIL_DIR}/makepkg.conf"
+export PACMAN="${PMTEST_UTIL_DIR}/pacman"
+MAKEPKG="${PMTEST_SCRIPT_DIR}/makepkg"
+
+# https://gitlab.archlinux.org/pacman/pacman/-/issues/143
+# Always check out the default branch, and not a branch matching
+# the directory name.
+test() {
+	# Dummy git repo
+	export GIT_COMMITTER_NAME="Test User"
+	export GIT_COMMITTER_EMAIL="test@example.com"
+	export GIT_AUTHOR_NAME="$GIT_COMMITTER_NAME"
+	export GIT_AUTHOR_EMAIL="$GIT_COMMITTER_EMAIL"
+
+	local gitrepo="$tempdir/gitrepo"
+	mkdir -p $gitrepo && cd $gitrepo
+	git init --initial-branch=main
+	git checkout -b main
+	touch good
+	git add good
+	git commit -m "good"
+	git checkout -b somebranch
+	git rm good
+	git commit -m "bad"
+	git checkout main
+
+	# Dummy PKGBUILD
+	local pkgbuild_content=$(cat <<EOF
+pkgname=test
+pkgver=1
+pkgrel=1
+arch=('any')
+source=(somebranch::git+file://$gitrepo)
+sha256sums=('SKIP')
+package() {
+  [[ -e somebranch/good ]]
+}
+EOF
+)
+
+	local pkgdir="$tempdir/pkgdir"
+	mkdir -p "$pkgdir" && cd "$pkgdir"
+	echo "$pkgbuild_content" > "PKGBUILD"
+
+	"$MAKEPKG"
+}
+
+test;

test/makepkg/meson.build

@@ -0,0 +1,9 @@
+find_program('git', required: true)
+
+test('makepkg-build-git-head-twice',
+     find_program('makepkg-build-git-head-twice.sh'),
+     env: TEST_ENV)
+
+test('makepkg-checkout-dir-matches-branch',
+     find_program('makepkg-checkout-dir-matches-branch.sh'),
+     env: TEST_ENV)