#!/bin/sh
set -e

rcs="$1"
srcdir="$2"
repository="$3"

usage () {
	echo "usage: ikiwiki-makerepo svn|git|svn|monotone|darcs|cvs srcdir repository" >&2
	echo "       ikiwiki-makerepo bzr|mercurial srcdir" >&2
	exit 1
}

if [ -z "$rcs" ] || [ -z "$srcdir" ]; then
	usage
fi

if [ ! -d "$srcdir" ]; then
	echo "srcdir $srcdir not found" >&2 
	exit 1
fi

if [ "$rcs" != mercurial ] && [ "$rcs" != bzr ]; then
	if [ -z "$repository" ]; then
		echo "you need to specify both a srcdir and a repository for $rcs" >&2
		usage
	fi
	if [ -e "$repository" ]; then
		echo "repository $repository already exists, aborting" >&2 
		exit 1
	fi
	repository="$(perl -e 'use Cwd; $r=shift; $r=getcwd.q{/}.$r if $r!~m!^/!; print $r' "$repository")"
	if [ -z "$repository" ]; then
		echo "internal error finding repository abs_path" >&2
		exit 1
	fi
fi

echo "Importing $srcdir into $rcs"

case "$rcs" in
cvs)
	if [ -e "$srcdir/CVS" ]; then
		echo "$srcdir already seems to be a cvs working copy" >&2
		exit 1
	fi
	cvs -Q -d "$repository" init
	cd "$srcdir"/..
	cvs -Q -d "$repository" get -P CVSROOT
	cd CVSROOT
	echo .ikiwiki >> cvsignore
	cvs -Q add cvsignore
	echo "^ikiwiki $repository/CVSROOT/post-commit %{sVv} &" >> loginfo
	cvs -Q commit -m "ikiwiki-makerepo setup" cvsignore loginfo
	cd ..
	rm -rf CVSROOT
	cd "$srcdir"
	cvs -Q -d "$repository" import -m "initial import" ikiwiki IKIWIKI PRE_CVS
	cd ..
	mv "$srcdir" "$srcdir.orig"
	cvs -Q -d "$repository" get -P -d "$(basename "$srcdir")" ikiwiki
	[ -d "$srcdir.orig/.ikiwiki" ] && mv "$srcdir.orig/.ikiwiki" "$srcdir"
	rm -rf "$srcdir.orig"
	echo "Directory $srcdir is now a checkout of $rcs repository $repository"
;;
svn)
	if [ -e "$srcdir/.svn" ]; then
		echo "$srcdir already seems to be a svn working copy" >&2
		exit 1
	fi
	svnadmin create "$repository"
	svn mkdir "file://$repository/trunk" -m "create trunk directory"
	cd "$srcdir"
	svn co "file://$repository/trunk" .
	svn propset svn:ignore ".ikiwiki" .
	svn add *
	svn commit -m "initial import"
	echo "Directory $srcdir is now a checkout of $rcs repository $repository"
;;
git)
	# There are better ways to do this, but this works with older
	# versions of git.)
	mkdir -p "$repository"
	(cd "$repository" && git --bare init --shared)

	cd "$srcdir"
	git init
	echo /.ikiwiki > .gitignore
	git add .
	git commit -m "initial commit"
	git remote add origin "$repository"
	git config branch.master.merge refs/heads/master
	git config branch.master.remote origin
	git push --all
	echo "Directory $srcdir is now a clone of $rcs repository $repository"
;;
mercurial)
	hg init "$srcdir"
	cd "$srcdir"
	echo .ikiwiki > .hgignore
	hg add
	hg commit -m "initial import"
	echo "Directory $srcdir is now set up as a mercurial repository"
;;
bzr)
	bzr init "$srcdir"
	cd "$srcdir"
	echo .ikiwiki > .bzrignore
	bzr add
	bzr commit -m "initial import"
	echo "Directory $srcdir is now set up as a bzr repository"
;;
monotone)
	if [ -e "$srcdir/_MTN" ]; then
		echo "$srcdir already seems to be a monotone working copy" >&2
		exit 1
	fi

	mkdir -p "$(dirname "$repository")"
	mtn db init -d "$repository"

	cleaned_srcdir=$(basename "$srcdir" | tr -s "[:space:]" "_" | sed 's/_$//g')
	reverse_hostname=$( (hostname -f 2>/dev/null || hostname) |\
		tr  "." "\n" | ( tac 2>/dev/null || tail -r ) | tr "\n" "." )
	branch_name="$reverse_hostname$cleaned_srcdir"
	mtn setup -d "$repository" -b "$branch_name" "$srcdir"

	cd "$srcdir"
	echo \.ikiwiki$ > .mtn-ignore
	mtn add -R .
	# this expects that you already have a working mtn environment
	# with a default key floating around...
	mtn ci -m "initial import"
	echo "Directory $srcdir is now set up as a monotone repository"
	echo ""
	echo "Note: If your monotone key has a passphrase, you need to configure"
	echo "monotone to automatically use it. Otherwise, web commits to ikiwiki"
	echo "will fail."
	echo ""
	echo "You can create a $srcdir/_MTN/monotonerc"
	echo "containing the passphrase:"
	echo ""
	echo "function get_passphrase (branchname)"
	echo '    return "passphrasehere"'
	echo "end"
;;
darcs)
	if [ -e "$srcdir/_darcs" ]; then
		echo "$srcdir already seems to be a darcs repository" >&2
		exit 1
	fi

	mkdir -p "$repository"
	(cd "$repository" && darcs initialize)

	mkdir -p "$srcdir"
	cd "$srcdir"
	darcs initialize
	echo .ikiwiki >> _darcs/prefs/boring
	darcs record -a -l -q -m "initial import"
	darcs pull -a -q "$repository"
	darcs push -a -q "$repository"
	echo "Directory $srcdir is now a branch of darcs repo $repository"

	# set up master repo's apply hook and tell user to adjust it if desired
	darcsdefaults="$repository/_darcs/prefs/defaults"
	echo "Preconfiguring apply hook in $darcsdefaults - adjust as desired!"
	echo "apply posthook $repository/_darcs/ikiwiki-wrapper" >> "$darcsdefaults"
	echo "apply run-posthook" >> "$darcsdefaults"
;;
*)
	echo "Unsupported revision control system $rcs" >&2
	usage
;;
esac