rcs2git, quick and dirty brute force

rcs2git

#!/bin/bash

email_domain=example.com
export email_domain

# so nothing in the environment comes through
unset GIT_AUTHOR_EMAIL
unset GIT_AUTHOR_DATE
unset GIT_AUTHOR_NAME
unset GIT_COMMITTER_NAME
unset GIT_COMMITTER_EMAIL
export GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE GIT_AUTHOR_NAME GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL

if [ -z "$*" ]; then
        echo "Usage: $0 *,v" >&2
        exit 0
fi

set -e
#set -x

if [ -d .git ]; then
        echo ".git dir already exists! (cowardly bailing)"
        exit 0
else
        git init
fi

# brute force, doesn't support tags or anything other than plain check-ins of individual files
# kinda sloppy in general
# first we get all the revisions and sort by edit date, then sort that to check them in the right order
(
for rcsfile in "$@" ; do
        rcsfile="$( echo "$rcsfile" | sed -e 's/,v$//;' )"
        echo "$rcsfile"

        for rev in $( rlog $rcsfile | awk '/^revision/{ print $2 }' | awk -F. '{print $2}' | sort -n ); do
                loginfo="$( rlog -r1.$rev $rcsfile | grep '^date: ' | tr ';' '\n' | sed -e 's/^ \+//;' )"
                # 2010/03/05 16:09:26
                # 2005-04-07T22:13:13 
                commitdate="$( echo "$loginfo" | grep date: | sed -e 's/^[^:]\+: //;' | sed -e 's/^ //; s!/!-!g; s/ /T/g;' )"
                GIT_AUTHOR_DATE="$commitdate"
                commitauthor="$( echo "$loginfo" | grep author: | sed -e 's/^[^:]\+: //;' )"
                EMAIL="$commitauthor@$email_domain"
                GIT_AUTHOR_NAME="$commitauthor"
                /bin/echo -e "$GIT_AUTHOR_DATE\t$rev\t$EMAIL\t$GIT_AUTHOR_NAME\t$rcsfile"
        done
done
) | sort | while read GIT_AUTHOR_DATE rev EMAIL GIT_AUTHOR_NAME rcsfile; do
        GIT_COMMITER_NAME=$GIT_AUTHOR_NAME
        export GIT_AUTHOR_DATE rev EMAIL GIT_AUTHOR_NAME rcsfile GIT_COMMITTER_NAME
        co -r1.$rev $rcsfile
        git add $rcsfile
        logmsg="$( rlog -r1.$rev $rcsfile | perl -e '$_=<> until (m/^date:.+author: /); while ($_=<>) { print $_ if !m/^=====/ }' )"
        git commit -m "$logmsg"
        echo "committed rev 1.$rev of $rcsfile" >&2
done