HGKeeper

// govcs

// This program is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

// This program is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License

// along with this program. If not, see <http://www.gnu.org/licenses/>.

// Package govcs is the entry point to using the govcs library.

package govcs

import (

"errors"

"bitbucket.org/rw_grim/govcs/git"

"bitbucket.org/rw_grim/govcs/hg"

"bitbucket.org/rw_grim/govcs/vcs"

)

type detectorFunc func(wd string) vcs.VCS

var (

detectors = []detectorFunc{

git.Detect,

hg.Detect,

}

ErrNoRepositoryFound = errors.New("no repository found")

)

// Detect will try to determine what version control system is in use in the

// given working directory and return a vcs.VCS instance for it.

func Detect(wd string) (vcs.VCS, error) {

var instance vcs.VCS

for _, detector := range detectors {

inst := detector(wd)

// we found a VCS

if inst != nil {

// if we found one previously, check who's root is longer so that

// we return the right vcs when they're nested.

// for example if we have

// foo/

// .git/

// bar/

// .hg/

// and we're testing bar, due to the order of the list we'd return

// a Git instance since it's first, but it really should be a

// mercurial instance.

if instance != nil {

if len(inst.Root()) > len(instance.Root()) {

instance = inst

}

} else {

instance = inst

}

if instance != nil {

return instance, nil

}

return nil, ErrNoRepositoryFound

}