Add pre-push git hook

kgryte · kgryte · commit 52464c975861 · 2016-06-16T04:16:45.000-07:00
diff --git a/tools/git/hooks/pre-push b/tools/git/hooks/pre-push
@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+#
+# A git hook called by "git push" after it has checked the remote status, but before anything has been pushed.
+#
+# If this script exits with a non-zero status, nothing will be pushed.
+#
+# This hook is called with the following parameters:
+#
+# $1 - name of the remote to which the push is being done
+# $2 - URL to which the push is being done
+#
+# If pushing without using a named remote, these arguments will be equal.
+#
+# Information about the commits which are being pushed is supplied as lines to stdin in the form:
+#
+# <local ref> <local sha1> <remote ref> <remote sha1>
+#
+
+# VARIABLES #
+
+remote="$1"
+url="$2"
+
+# Define the command to run tests:
+export GIT_HOOK_TEST='make test'
+
+
+# FUNCTIONS #
+
+# Defines an error handler.
+#
+# $1 - error status
+on_error() {
+	cleanup
+	exit "$1"
+}
+
+# Runs clean-up tasks.
+cleanup() {
+	echo '' >&2
+}
+
+# Checks if commits exist to push, as `git push` will execute regardless of whether commits exist to push or not.
+has_commits() {
+	local commits=`git log @{u}..`
+	if [[ -z "$commits" ]]; then
+	    return 1
+	fi
+	return 0
+}
+
+# Runs tests.
+run_tests() {
+	echo 'Running tests...'
+	$GIT_HOOK_TEST
+	if [[ "$?" -ne 0 ]]; then
+        echo "$GIT_HOOK_TEST failed." >&2
+        return 1
+    fi
+    echo 'Tests passed.' >&2
+    return 0
+}
+
+# Main execution sequence.
+main() {
+	has_commits
+	if [[ "$?" -ne 0 ]]; then
+		on_error 1
+	fi
+	run_tests
+	if [[ "$?" -ne 0 ]]; then
+		on_error 1
+	fi
+	cleanup
+	exit 0
+}
+
+# Run main:
+main
