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+" vim600: set foldmethod=marker:
+"
+" git extension for VCSCommand.
+"
+" Version:       VCS development
+" Maintainer:    Bob Hiestand <bob.hiestand@gmail.com>
+" License:
+" Copyright (c) 2007 Bob Hiestand
+"
+" Permission is hereby granted, free of charge, to any person obtaining a copy
+" of this software and associated documentation files (the "Software"), to
+" deal in the Software without restriction, including without limitation the
+" rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+" sell copies of the Software, and to permit persons to whom the Software is
+" furnished to do so, subject to the following conditions:
+"
+" The above copyright notice and this permission notice shall be included in
+" all copies or substantial portions of the Software.
+"
+" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+" AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+" FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+" IN THE SOFTWARE.
+"
+" Section: Documentation {{{1
+"
+" Options documentation: {{{2
+"
+" VCSCommandGitExec
+"   This variable specifies the git executable.  If not set, it defaults to
+"   'git' executed from the user's executable path.
+"
+" VCSCommandGitDiffOpt
+"   This variable, if set, determines the default options passed to the
+"   VCSDiff command.  If any options (starting with '-') are passed to the
+"   command, this variable is not used.
+
+" Section: Plugin header {{{1
+
+if v:version < 700
+	echohl WarningMsg|echomsg 'VCSCommand requires at least VIM 7.0'|echohl None
+	finish
+endif
+
+runtime plugin/vcscommand.vim
+
+if !executable(VCSCommandGetOption('VCSCommandGitExec', 'git'))
+	" git is not installed
+	finish
+endif
+
+let s:save_cpo=&cpo
+set cpo&vim
+
+" Section: Variable initialization {{{1
+
+let s:gitFunctions = {}
+
+" Section: Utility functions {{{1
+
+" Function: s:DoCommand(cmd, cmdName, statusText, options) {{{2
+" Wrapper to VCSCommandDoCommand to add the name of the git executable to the
+" command argument.
+function! s:DoCommand(cmd, cmdName, statusText, options)
+	if VCSCommandGetVCSType(expand('%')) == 'git'
+		let fullCmd = VCSCommandGetOption('VCSCommandGitExec', 'git',) . ' ' . a:cmd
+		return VCSCommandDoCommand(fullCmd, a:cmdName, a:statusText, a:options)
+	else
+		throw 'git VCSCommand plugin called on non-git item.'
+	endif
+endfunction
+
+" Section: VCS function implementations {{{1
+
+" Function: s:gitFunctions.Identify(buffer) {{{2
+" This function only returns an inexact match due to the detection method used
+" by git, which simply traverses the directory structure upward.
+function! s:gitFunctions.Identify(buffer)
+	let oldCwd = VCSCommandChangeToCurrentFileDir(resolve(bufname(a:buffer)))
+	try
+		call system(VCSCommandGetOption('VCSCommandGitExec', 'git') . ' rev-parse --is-inside-work-tree')
+		if(v:shell_error)
+			return 0
+		else
+			return g:VCSCOMMAND_IDENTIFY_INEXACT
+		endif
+	finally
+		call VCSCommandChdir(oldCwd)
+	endtry
+endfunction
+
+" Function: s:gitFunctions.Add(argList) {{{2
+function! s:gitFunctions.Add(argList)
+	return s:DoCommand(join(['add'] + ['-v'] + a:argList, ' '), 'add', join(a:argList, ' '), {})
+endfunction
+
+" Function: s:gitFunctions.Annotate(argList) {{{2
+function! s:gitFunctions.Annotate(argList)
+	if len(a:argList) == 0
+		if &filetype == 'gitAnnotate'
+			" Perform annotation of the version indicated by the current line.
+			let options = matchstr(getline('.'),'^\x\+')
+		else
+			let options = ''
+		endif
+	elseif len(a:argList) == 1 && a:argList[0] !~ '^-'
+		let options = a:argList[0]
+	else
+		let options = join(a:argList, ' ')
+	endif
+
+	let resultBuffer = s:DoCommand('blame ' . options . ' -- ', 'annotate', options, {})
+	if resultBuffer > 0
+		normal 1G
+		set filetype=gitAnnotate
+	endif
+	return resultBuffer
+endfunction
+
+" Function: s:gitFunctions.Commit(argList) {{{2
+function! s:gitFunctions.Commit(argList)
+	let resultBuffer = s:DoCommand('commit -F "' . a:argList[0] . '"', 'commit', '', {})
+	if resultBuffer == 0
+		echomsg 'No commit needed.'
+	endif
+	return resultBuffer
+endfunction
+
+" Function: s:gitFunctions.Delete() {{{2
+" All options are passed through.
+function! s:gitFunctions.Delete(argList)
+	let options = a:argList
+	let caption = join(a:argList, ' ')
+	return s:DoCommand(join(['rm'] + options, ' '), 'delete', caption, {})
+endfunction
+
+" Function: s:gitFunctions.Diff(argList) {{{2
+" Pass-through call to git-diff.  If no options (starting with '-') are found,
+" then the options in the 'VCSCommandGitDiffOpt' variable are added.
+function! s:gitFunctions.Diff(argList)
+	let gitDiffOpt = VCSCommandGetOption('VCSCommandGitDiffOpt', '')
+	if gitDiffOpt == ''
+		let diffOptions = []
+	else
+		let diffOptions = [gitDiffOpt]
+		for arg in a:argList
+			if arg =~ '^-'
+				let diffOptions = []
+				break
+			endif
+		endfor
+	endif
+
+	let resultBuffer = s:DoCommand(join(['diff'] + diffOptions + a:argList), 'diff', join(a:argList), {})
+	if resultBuffer > 0
+		set filetype=diff
+	else
+		echomsg 'No differences found'
+	endif
+	return resultBuffer
+endfunction
+
+" Function: s:gitFunctions.GetBufferInfo() {{{2
+" Provides version control details for the current file.  Current version
+" number and current repository version number are required to be returned by
+" the vcscommand plugin.  This CVS extension adds branch name to the return
+" list as well.
+" Returns: List of results:  [revision, repository, branch]
+
+function! s:gitFunctions.GetBufferInfo()
+	let oldCwd = VCSCommandChangeToCurrentFileDir(resolve(bufname('%')))
+	try
+		let branch = substitute(system(VCSCommandGetOption('VCSCommandGitExec', 'git') . ' symbolic-ref -q HEAD'), '\n$', '', '')
+		if v:shell_error
+			let branch = 'DETACHED'
+		else
+			let branch = substitute(branch, '^refs/heads/', '', '')
+		endif
+
+		let info = [branch]
+
+		for method in split(VCSCommandGetOption('VCSCommandGitDescribeArgList', (',tags,all,always')), ',', 1)
+			if method != ''
+				let method = ' --' . method
+			endif
+			let tag = substitute(system(VCSCommandGetOption('VCSCommandGitExec', 'git') . ' describe' . method), '\n$', '', '')
+			if !v:shell_error
+				call add(info, tag)
+				break
+			endif
+		endfor
+
+		return info
+	finally
+		call VCSCommandChdir(oldCwd)
+	endtry
+endfunction
+
+" Function: s:gitFunctions.Log() {{{2
+function! s:gitFunctions.Log(argList)
+	let resultBuffer=s:DoCommand(join(['log'] + a:argList), 'log', join(a:argList, ' '), {})
+	if resultBuffer > 0
+		set filetype=gitlog
+	endif
+	return resultBuffer
+endfunction
+
+" Function: s:gitFunctions.Revert(argList) {{{2
+function! s:gitFunctions.Revert(argList)
+	return s:DoCommand('checkout', 'revert', '', {})
+endfunction
+
+" Function: s:gitFunctions.Review(argList) {{{2
+function! s:gitFunctions.Review(argList)
+	if len(a:argList) == 0
+		let revision = 'HEAD'
+	else
+		let revision = a:argList[0]
+	endif
+
+	let oldCwd = VCSCommandChangeToCurrentFileDir(resolve(bufname('%')))
+	try
+		let prefix = system(VCSCommandGetOption('VCSCommandGitExec', 'git') . ' rev-parse --show-prefix')
+	finally
+		call VCSCommandChdir(oldCwd)
+	endtry
+
+	let prefix = substitute(prefix, '\n$', '', '')
+	let blob = revision . ':' . prefix . '<VCSCOMMANDFILE>' 
+	let resultBuffer = s:DoCommand('show ' . blob, 'review', revision, {})
+	if resultBuffer > 0
+		let &filetype=getbufvar(b:VCSCommandOriginalBuffer, '&filetype')
+	endif
+	return resultBuffer
+endfunction
+
+" Function: s:gitFunctions.Status(argList) {{{2
+function! s:gitFunctions.Status(argList)
+	return s:DoCommand(join(['status'] + a:argList), 'log', join(a:argList), {'allowNonZeroExit': 1})
+endfunction
+
+" Function: s:gitFunctions.Update(argList) {{{2
+function! s:gitFunctions.Update(argList)
+	throw "This command is not implemented for git because file-by-file update doesn't make much sense in that context.  If you have an idea for what it should do, please let me know."
+endfunction
+
+
+" Section: Plugin Registration {{{1
+call VCSCommandRegisterModule('git', expand('<sfile>'), s:gitFunctions, [])
+
+let &cpo = s:save_cpo