Archive the SVN->Git conversion scripts. Not distributed.

[~andy/fetchmail] / vcs-tools / fetchmail-svn2git.sh

diff --git a/vcs-tools/fetchmail-svn2git.sh b/vcs-tools/fetchmail-svn2git.sh
new file mode 100755 (executable)
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--- /dev/null
+++ b/vcs-tools/fetchmail-svn2git.sh
@@ -0,0 +1,69 @@
+#!/bin/sh
+
+# fetchmail-svn2git.sh - (C) 2009, 2010 by Matthias Andree, GNU GPL v3.
+
+set -eu
+
+#######################################################################
+# Adjust the next three settings below:
+
+# safe can be obtained from <git://repo.or.cz/svn-all-fast-export.git>
+# and must be built before we can use it:
+safe="$HOME/VCS-other/svn-all-fast-export/svn-all-fast-export"
+
+# svn is the path to a verbatim copy of the server-side SVN repository
+# obtained with rsync or with svnadmin dump and load:
+svn="$HOME/VCS-mine/fetchmail.svnrepo.backup"
+
+# git specifies where you want the converted repository to end up.
+git="$HOME/fetchmail.git"
+
+#
+#######################################################################
+
+# There should be no need to change anything below:
+
+#######################################################################
+
+# obtain current directory
+dir="$(dirname $0)"
+
+# obtain absolute directory
+dir="$( ( cd "$dir" && pwd ) )"
+
+# Pluck these from the same directory as this script
+auth="$dir/fetchmail.authors"
+rule="$dir/fetchmail.rules"
+
+# create git repository
+mkdir "$git"
+cd "$git"
+git init
+
+# run svn-all-fast-export, which already imports stuff into git
+"$safe" --identity-map="$auth" "$rule" "$svn"
+
+# turn tags/ branches into tags
+git branch -a \
+| grep _tag_ \
+| while read a ; do
+       if git show-ref -q "$a" ; then
+               (
+               eval $(git log -1 --format="tformat:GIT_AUTHOR_NAME=\"%an\"%nGIT_AUTHOR_EMAIL=\"%ae\"%nGIT_AUTHOR_DATE=\"%ai\"%nGIT_COMMITTER_NAME=\"%cn\"%nGIT_COMMITTER_EMAIL=\"%ce\"%nGIT_COMMITTER_DATE=\"%ci\"" "$a")
+               MSG=$(git log -1 --pretty="tformat:%s%n%n%b" "$a")
+               export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
+               export GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL GIT_COMMITTER_DATE
+               if test "$GIT_AUTHOR_NAME" = nobody ; then
+                       # cvs2svn tag => lightweight
+                       git tag "${a##_tag_}" "$a"
+               else
+                       # keep message
+                       git tag -a -m "$MSG" "${a##_tag_}" "$a"
+               fi
+               git branch -D "$a"
+               )
+       fi
+done
+
+# clean up
+git gc --aggressive