Add a pre-commit hook (fix #9)

Author: ghuysmans

README.md

@@ -52,3 +52,9 @@ $ (cd utils; ./sqldep_to_schema_dot) <demo/data/all.dep |dot -Tsvg >demo/data/sc
 $ cd demo/data
 $ make
 ```
+
+### Fully automatic
+
+Checks can be run before each commit using a pre-commit hook.
+Please install [`hooks/pre-commit`](hooks/pre-commit)
+into each of your repositories' `.git/hooks`.

hooks/pre-commit

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Redirect output to stderr.
+exec 1>&2
+
+DATA=$(git config hooks.projectdata)
+if [ -z "$DATA" ]; then
+	echo error: please configure the data root in hooks.projectdata >&2
+	exit 1
+fi
+
+PROJECT=$(basename "$(git rev-parse --show-toplevel)")
+if ! grep "all.dep:.* $PROJECT\.dep" $DATA/Makefile >/dev/null; then
+	echo warning: this project is NOT analyzed by sqldep >&2
+fi
+
+(cd $DATA && make check)