From 39e75fe1f14385f37bdd9bc05f75067ef621b10c Mon Sep 17 00:00:00 2001
From: steckbrief <steckbrief@chefmail.de>
Date: Tue, 8 May 2018 21:23:00 +0200
Subject: Update Hook

---
 update-hook.sh | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 update-hook.sh

diff --git a/update-hook.sh b/update-hook.sh
new file mode 100644
index 0000000..ff4d20b
--- /dev/null
+++ b/update-hook.sh
@@ -0,0 +1,77 @@
+#!/bin/sh
+#
+# Update Hook to ensure the version code is increased in a new tag
+#
+
+# --- Command line
+refname="$1"
+oldrev="$2"
+newrev="$3"
+
+# --- Safety check
+if [ -z "$GIT_DIR" ]; then
+	echo "Don't run this script from the command line." >&2
+	echo " (if you want, you could supply GIT_DIR then run" >&2
+	echo "  $0 <ref> <oldrev> <newrev>)" >&2
+	exit 1
+fi
+
+if [ -z "$refname" -o -z "$oldrev" -o -z "$newrev" ]; then
+	echo "usage: $0 <ref> <oldrev> <newrev>" >&2
+	exit 1
+fi
+
+# --- Check types
+# if $newrev is 0000...0000, it's a commit to delete a ref.
+zero="0000000000000000000000000000000000000000"
+if [ "$newrev" = "$zero" ]; then
+	newrev_type=delete
+else
+	newrev_type=$(git cat-file -t $newrev)
+fi
+
+case "$refname","$newrev_type" in
+	refs/tags/*,commit)
+		# un-annotated tag
+		oldVersionCode=`git archive $(git describe --tags) build.gradle | tar -xO | less - | grep versionCode | awk '{print $2}' 2> /dev/null`
+		
+		if [[ "$oldVersionCode" =~ ^[0-9]+$ ]]
+		then
+			echo "*** Old version code is not an integer" >&2
+			exit 1
+		fi
+		newVersionCode=`git archive $newrev build.gradle | tar -xO | less - | grep versionCode | awk '{print $2}' 2> /dev/null`
+		if [[ "$newVersionCode" =~ ^[0-9]+$ ]]
+		then
+			echo "*** New version code is not an integer" >&2
+			exit 1
+		fi
+		if [ "$oldVersionCode" = "$newVersionCode" ]; then
+			echo "*** A new version code is needed to commit" >&2
+			exit 1
+		fi
+		;;
+	refs/tags/*,tag)
+		# annotated tag
+		oldVersionCode=`git archive $(git describe --tags) build.gradle | tar -xO | less - | grep versionCode | awk '{print $2}' 2> /dev/null`
+		
+		if [[ "$oldVersionCode" =~ ^[0-9]+$ ]]
+		then
+			echo "*** Old version code is not an integer" >&2
+			exit 1
+		fi
+		newVersionCode=`git archive $newrev build.gradle | tar -xO | less - | grep versionCode | awk '{print $2}' 2> /dev/null`
+		if [[ "$newVersionCode" =~ ^[0-9]+$ ]]
+		then
+			echo "*** New version code is not an integer" >&2
+			exit 1
+		fi
+		if [ "$oldVersionCode" = "$newVersionCode" ]; then
+			echo "*** A new version code is needed to commit" >&2
+			exit 1
+		fi
+		;;
+esac
+
+# --- Finished
+exit 0
\ No newline at end of file
-- 
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