1 files changed, 52 insertions, 0 deletions
diff --git a/build-aux/pkg-version b/build-aux/pkg-version
new file mode 100755
index 00000000000..2be2a975621
--- /dev/null
+++ b/build-aux/pkg-version
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# To override version/release from git,
+# create VERSION file containing text with version/release
+# eg. v3.4.0-1
+PKG_VERSION=`cat VERSION 2> /dev/null || git describe --tags --match "v[0-9]*"`
+
+function get_version ()
+{
+    # tags and output versions:
+    #   - v3.4.0   => 3.4.0 (upstream clean)
+    #   - v3.4.0-1 => 3.4.0 (downstream clean)
+    #   - v3.4.0-2-g34e62f   => 3.4.0 (upstream dirty)
+    #   - v3.4.0-1-2-g34e62f => 3.4.0 (downstream dirty)
+    AWK_VERSION='
+    BEGIN { FS="-" }
+    /^v[0-9]/ {
+      sub(/^v/,"") ; print $1
+    }'
+
+    echo $PKG_VERSION | awk "$AWK_VERSION" | tr -cd '[:alnum:].'
+}
+
+function get_release ()
+{
+    # tags and output releases:
+    #   - v3.4.0   => 0 (upstream clean)
+    #   - v3.4.0-1 => 1 (downstream clean)
+    #   - v3.4.0-2-g34e62f1   => 2.git34e62f1 (upstream dirty)
+    #   - v3.4.0-1-2-g34e62f1 => 1.2.git34e62f1 (downstream dirty)
+    AWK_RELEASE='
+    BEGIN { FS="-"; OFS="." }
+    /^v[0-9]/ {
+      if (NF == 1) print 0
+      else if (NF == 2) print $2
+      else if (NF == 3) print $2, "git" substr($3, 2)
+      else if (NF == 4) print $2, $3, "git" substr($4, 2)
+    }'
+
+    echo $PKG_VERSION | awk "$AWK_RELEASE" | tr -cd '[:alnum:].'
+}
+
+if test "x$1" = "x--full"; then
+    echo -n "v$(get_version)-$(get_release)"
+elif test "x$1" = "x--version"; then
+    get_version
+elif test "x$1" = "x--release"; then
+    get_release
+else
+    echo "usage: $0 [--full|--version|--release]"
+    exit 1
+fi