abump: check version before we build

abump.in

@@ -51,6 +51,9 @@ do_bump() {
 			|| die "APKBUILD has different \$pkgname for $name"
 		type package | grep -q function \
 			|| die "missing package() for $name"
+		if [ "$pkgver" = "$ver" ] && git diff-index --quiet HEAD -- APKBUILD; then
+			die "version is already $ver"
+		fi
 
 		cd "${a%/*}"
 		section=${PWD%/*}

tests/abump.bats

@@ -83,3 +83,33 @@ teardown() {
 	run $ABUMP foo-1.0
 	[ $status -ne 0 ]
 }
+
+@test "abump: test bumping same version which is not in git" {
+	mkdir -p "$tmpdir"/main/foo
+	cd "$tmpdir"/main/foo
+	echo "first" > foo-1.0.txt
+	echo "second" > foo-1.1.txt
+	cat > APKBUILD <<-EOF
+		# Maintainer: Test user <user@example.com>
+		pkgname="foo"
+		pkgver=1.0
+		pkgrel=0
+		pkgdesc="dummy package for test"
+		url="https://alpinelinux.org"
+		license="MIT"
+		arch="noarch"
+		source="foo-\$pkgver.txt"
+		options="!check"
+		package() {
+			install -D "\$srcdir"/foo-\$pkgver.txt "\$pkgdir"/foo
+		}
+	EOF
+	$ABUILD checksum
+	$ABUILD
+	git add APKBUILD foo-1.0.txt
+	git commit -m "test commit"
+
+	sed -i -e 's/pkgver=.*/pkgver=1.1/' APKBUILD
+
+	$ABUMP foo-1.1
+}