yading@11: #!/bin/sh
yading@11: 
yading@11: # check for git short hash
yading@11: if ! test "$revision"; then
yading@11:     revision=$(cd "$1" && git describe --tags --match N 2> /dev/null)
yading@11: fi
yading@11: 
yading@11: # Shallow Git clones (--depth) do not have the N tag:
yading@11: # use 'git-YYYY-MM-DD-hhhhhhh'.
yading@11: test "$revision" || revision=$(cd "$1" &&
yading@11:   git log -1 --pretty=format:"git-%cd-%h" --date=short 2> /dev/null)
yading@11: 
yading@11: # Snapshots from gitweb are in a directory called ffmpeg-hhhhhhh or
yading@11: # ffmpeg-HEAD-hhhhhhh.
yading@11: if [ -z "$revision" ]; then
yading@11:   srcdir=$(cd "$1" && pwd)
yading@11:   case "$srcdir" in
yading@11:     */ffmpeg-[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
yading@11:       git_hash="${srcdir##*-}";;
yading@11:     */ffmpeg-HEAD-[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
yading@11:       git_hash="${srcdir##*-}";;
yading@11:   esac
yading@11: fi
yading@11: 
yading@11: # no revision number found
yading@11: test "$revision" || revision=$(cd "$1" && cat RELEASE 2> /dev/null)
yading@11: 
yading@11: # Append the Git hash if we have one
yading@11: test "$revision" && test "$git_hash" && revision="$revision-$git_hash"
yading@11: 
yading@11: # releases extract the version number from the VERSION file
yading@11: version=$(cd "$1" && cat VERSION 2> /dev/null)
yading@11: test "$version" || version=$revision
yading@11: 
yading@11: test -n "$3" && version=$version-$3
yading@11: 
yading@11: if [ -z "$2" ]; then
yading@11:     echo "$version"
yading@11:     exit
yading@11: fi
yading@11: 
yading@11: NEW_REVISION="#define FFMPEG_VERSION \"$version\""
yading@11: OLD_REVISION=$(cat version.h 2> /dev/null)
yading@11: 
yading@11: # Update version.h only on revision changes to avoid spurious rebuilds
yading@11: if test "$NEW_REVISION" != "$OLD_REVISION"; then
yading@11:     echo "$NEW_REVISION" > "$2"
yading@11: fi