Add a simple Git-SVN synchronizer

dscho · dscho · commit 4b2d40d77835 · 2012-11-26T18:38:55.000-06:00
This, too, is meant for Jenkins jobs.

Signed-off-by: Johannes Schindelin &lt;johannes.schindelin@gmx.de&gt;
diff --git a/git-svn-synchronizer.sh b/git-svn-synchronizer.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+
+# This script synchronizes a Git repository with a given Subversion repository.
+# Originally specific to ImageJ2 (before that project switched over to Git),
+# it accepts the repository URLs via the command-line, e.g. for use in a
+# Jenkins job.
+#
+# It takes the Subversion URL as first parameter and an arbitrary number of
+# Git push URLs after that.
+#
+# Example:
+#
+# git-svn-synchronizer.sh \
+#	https://valelab.ucsf.edu/svn/micromanager2/ \
+#	github.com:openspim/micromanager \
+#	fiji.sc:/srv/git/micromanager1.4/.git \
+
+if test $# -lt 2
+then
+	echo "Usage: $0 <Subversion-URL> <Git-push-URL>..." >&2
+	exit 1
+fi
+
+set -e
+
+SVN_URL="$1"
+shift
+
+# initialize repository
+if ! test -d .git
+then
+	git init &&
+	git config core.bare true &&
+	git remote add -f tmp "$1" &&
+	# read from remote repository to prevent unnecessary git-svn cloning
+	git for-each-ref --format '%(refname)' refs/remotes/tmp/svn/ |
+	while read ref
+	do
+		git push . $ref:refs/remotes/${ref#refs/remotes/tmp/svn/}
+	done &&
+	git remote rm tmp
+fi
+
+# initialize the Subversion URL
+if ! test -d .git/svn || test "a$SVN_URL" != "$(git config svn-remote.svn.url)"
+then
+	# Try standard trunk/branches/tags setup first
+	if ! git svn init -s "$SVN_URL" &&
+		! git svn fetch &&
+		! git rev-parse refs/remotes/trunk
+	then
+		git svn init "$SVN_URL" &&
+		git svn fetch
+	fi
+else
+	git svn fetch
+fi
+
+# push refs/remote/* to refs/heads/svn/*
+args="$(git for-each-ref --shell --format '%(refname)' refs/remotes/ |
+	sed -e "s/^'\(refs\/remotes\/\(.*\)\)'$/'\1:refs\/heads\/svn\/\2'/" \
+		-e 's/:refs\/heads\/svn\/tags\//:refs\/tags\//')"
+
+for remote
+do
+        eval git push \"$remote\" $args
+done
