Replay subversion into git via filesystem

Hi all,

In response to some recent questions about big imports of svn history into git and as a part of my svn-dump-fast export project, I have created a simple bash script to replay the root of a svn repository into a git repository. The assumption is that svnsync is used to pull the remote repository and that svk is used to manage the working copy.

The mirror might be set up like so: svnadmin create /path/to/mirror svnsync init file:///path/to/mirror http://remote.com/svn svnsync sync file:///path/to/mirror svk depot depot_name /path/to/mirror

I'd appreciate any comments on the correctness of the script.

-- David Barr --

#!/bin/bash SVK_DEPOT="" CO_DIR=validation HASH_DIR=.git/wc

SVN_UUID=`svk pg --revprop -r0 svn:sync-from-uuid /$SVK_DEPOT/` SVN_URL=`svk pg --revprop -r0 svn:sync-from-url /$SVK_DEPOT/` MAX_REV=`svk pg --revprop -r0 svn:sync-last-merged-rev /$SVK_DEPOT/`

echo SVN_UUID: $SVN_UUID echo SVN_URL: $SVN_URL echo MAX_REV: $MAX_REV

svk co -r1 /$SVK_DEPOT/ $CO_DIR
cd $CO_DIR
git init
mkdir -p $HASH_DIR/{0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f}\
{0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f}
for (( REV=1 ; REV<=MAX_REV ; ++REV )) do
  svk up -r$REV
  # Hashify working copy
  git update-index --refresh 2>/dev/null
  git ls-files -modz | tee .git/filelist \
   | git update-index -z --add --replace --remove --stdin
  xargs -0 git ls-files -s < .git/filelist | (
    while read MODE HASH STAGE FILE ; do
      HASH_FILE="$HASH_DIR/${HASH:0:2}/$HASH$MODE"
      ln "$FILE" "$HASH_FILE" 2>/dev/null || \
        ln -f "$HASH_FILE" "$FILE"
    done
  )
  SVN_AUTHOR=`svk pg --revprop -r$REV svn:author`
  SVN_DATE=`svk pg --revprop -r$REV svn:date`
  export GIT_COMMITTER_NAME=$SVN_AUTHOR
  export GIT_COMMITTER_EMAIL=$SVN_AUTHOR"@"$SVN_UUID
  export GIT_COMMITTER_DATE="`date -juf '%FT%T' $SVN_DATE \
    '+%F %T %z' 2>/dev/null`"
  export GIT_AUTHOR_NAME="$GIT_COMMITTER_NAME"
  export GIT_AUTHOR_EMAIL="$GIT_COMMITTER_EMAIL"
  export GIT_AUTHOR_DATE="$GIT_COMMITTER_DATE"
  GIT_PARENT=""
  [ $REV -gt 1 ] && GIT_PARENT="-p `git show-ref --head -s HEAD`"
  GIT_TREE=`git write-tree`
  echo git commit-tree $GIT_TREE $GIT_PARENT
  GIT_COMMIT=`svk pg --revprop -r$REV svn:log \
   | git commit-tree $GIT_TREE $GIT_PARENT`
  git update-ref HEAD $GIT_COMMIT
  git tag $REV
  git gc --auto
done