autotools: Make petitboot autoreconfable

[petitboot] / version.sh

diff --git a/version.sh b/version.sh
new file mode 100755 (executable)
index 0000000..eed8d3a
--- /dev/null
+++ b/version.sh
@@ -0,0 +1,34 @@
+#! /bin/bash
+#
+# version.sh: create a version string for use by configure.ac
+
+version=
+
+if head=$(git rev-parse --short --verify HEAD 2>/dev/null); then
+
+       # If available, use the git commit revision for the package version.
+
+       # Add a date prefix for easy reading.
+       # date='2010-11-30 16:36:09 -0800'
+
+       date=$(git log --pretty=format:"%ci" -1 HEAD)
+       date=${date##20}
+       date=${date%%:[0-9][0-9] *}
+       date=${date//-/.}
+       date=${date// /.}
+       date=${date//:/.}
+
+       version=$(printf '%s-%s%s' ${date} g ${head})
+
+       # Add a '-dirty' postfix for uncommitted changes.
+
+       if git diff-index HEAD | read dummy; then
+               version=`printf '%s%s' ${version} -dirty`
+       fi
+else
+       # Default to current date and time.
+
+       version="dev-$(date +%y.%m.%d-%H.%M.%S)"
+fi
+
+echo $version