build systems: uniformize git_sha1.h generation

[mesa.git] / git_sha1_gen.sh

diff --git a/git_sha1_gen.sh b/git_sha1_gen.sh
new file mode 100755 (executable)
index 0000000..20ab8df
--- /dev/null
+++ b/git_sha1_gen.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+# run git from the sources directory
+cd "$(dirname "$0")"
+
+# don't print anything if git fails
+if ! git_sha1=$(git --git-dir=.git rev-parse --short=10 HEAD 2>/dev/null)
+then
+  exit
+fi
+
+printf '#define MESA_GIT_SHA1 "git-%s"\n' "$git_sha1"