initial
This commit is contained in:
Marc Wäckerlin
208
svn-to-git
Executable file
208
svn-to-git
Executable file
@@ -0,0 +1,208 @@
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#!/bin/bash -e
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############################################################################ begin logging
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# check if stdout is a terminal...
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if test -t 1; then
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# see if it supports colors...
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ncolors=$(tput colors)
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if test -n "$ncolors" && test $ncolors -ge 8; then
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bold="$(tput bold)"
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underline="$(tput smul)"
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standout="$(tput smso)"
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normal="$(tput sgr0)"
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black="$(tput setaf 0)"
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red="$(tput setaf 1)"
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green="$(tput setaf 2)"
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yellow="$(tput setaf 3)"
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blue="$(tput setaf 4)"
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magenta="$(tput setaf 5)"
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cyan="$(tput setaf 6)"
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white="$(tput setaf 7)"
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fi
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fi
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append_msg() {
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if test $# -ne 0; then
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echo -n ": ${bold}$*"
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fi
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echo "${normal}"
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}
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# write a message
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message() {
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if test $# -eq 0; then
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return
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fi
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echo "${bold}${white}$*${normal}" 1>&2
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}
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# write a success message
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success() {
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echo -n "${bold}${green}success" 1>&2
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append_msg $* 1>&2
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}
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# write a notice
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notice() {
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echo -n "${bold}${yellow}notice" 1>&2
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append_msg $* 1>&2
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}
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# write a warning message
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warning() {
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echo -en "${bold}${red}warning" 1>&2
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append_msg $* 1>&2
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}
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# write error message
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error() {
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echo -en "${bold}${red}error" 1>&2
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append_msg $* 1>&2
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}
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# run a command, print the result and abort in case of error
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# option: --ignore: ignore the result, continue in case of error
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run() {
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ignore=1
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while test $# -gt 0; do
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case "$1" in
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(--ignore) ignore=0;;
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(*) break;;
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esac
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shift;
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done
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echo -n "${bold}${yellow}running:${white} $*${normal} … "
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set +e
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result=$($* 2>&1)
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res=$?
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set -e
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if test $res -ne 0; then
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if test $ignore -eq 1; then
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error "failed with return code: $res"
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if test -n "$result"; then
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echo "$result"
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fi
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exit 1
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else
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warning "ignored return code: $res"
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fi
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else
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success
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fi
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}
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############################################################################ error handler
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function traperror() {
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set +x
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local err=($1) # error status
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local line="$2" # LINENO
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local linecallfunc="$3"
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local command="$4"
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local funcstack="$5"
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IFS=" "
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for e in ${err[@]}; do
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if test -n "$e" -a "$e" != "0"; then
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error "line $line - command '$command' exited with status: $e (${err[@]})"
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if [ "${funcstack}" != "main" -o "$linecallfunc" != "0" ]; then
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echo -n " ... error at ${funcstack} " 1>&2
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if [ "$linecallfunc" != "" ]; then
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echo -n "called at line $linecallfunc" 1>&2
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fi
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echo
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fi
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exit $e
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fi
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done
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success
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exit 0
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}
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# catch errors
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trap 'traperror "$? ${PIPESTATUS[@]}" $LINENO $BASH_LINENO "$BASH_COMMAND" "${FUNCNAME[@]}" "${FUNCTION}"' ERR SIGINT INT TERM EXIT
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######################################################### commandline parameter evaluation
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while test $# -gt 0; do
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case "$1" in
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(--help|-h) less <<EOF
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SYNOPSIS
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$0 [OPTIONS]
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OPTIONS
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--help, -h show this help
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DESCRIPTION
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EOF
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exit;;
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(*) error "unknow option $1, try $0 --help"; exit 1;;
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esac
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if test $# -eq 0; then
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error "missing parameter, try $0 --help"; exit 1
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fi
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shift;
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done
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##################################################################################### Main
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function createusers() {
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tmpdir="/tmp/old-svn-${gittarget}"
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svn co "$svnurl" "$tmpdir"
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cd "$tmpdir"
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svn log -q | \
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awk -F '|' \
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'/^r/ {sub("^ ", "", $2); sub(" $", "", $2); print $2" = "$2" <"$2">"}' | \
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sort -u > "$users"
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cd -
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rm -rf "$tmpdir"
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}
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users=users.txt
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options=("--authors-file=$users" "--no-metadata" "--prefix" "" "-s")
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svnurl="$1"
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giturl="$2"
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gittarget="${svnurl##*/}"
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if ! test -f "$users"; then
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createusers
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fi
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# migration according to
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# https://git-scm.com/book/en/v2/Git-and-Other-Systems-Migrating-to-Git
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# one-way clone subversion repository
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run git svn clone "${options[@]}" "$svnurl" "$gittarget"
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cd "$gittarget"
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# move the tags to be proper git tags
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for t in $(git for-each-ref --format='%(refname:short)' refs/remotes/tags); do
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run git tag ${t/tags\//} $t && git branch -D -r $t
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done
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# move the rest of the references under refs/remotes to be local branches
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for b in $(git for-each-ref --format='%(refname:short)' refs/remotes); do
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run git branch $b refs/remotes/$b && git branch -D -r $b
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done
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# remove peg-revisions
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for p in $(git for-each-ref --format='%(refname:short)' | grep @); do
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run git branch -D $p
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done
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# remove extra trunk branch
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run git branch -d trunk
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# add new remote repository
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run git remote add origin "$giturl"
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run git push origin --all
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run git push origin --tags
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# checkout fresh git repository
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cd -
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run rm -rf "$gittarget"
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run git clone "$giturl" "$gittarget"
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