/
resolveGitRepo.js
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/
resolveGitRepo.js
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'use strict'
const normalize = require('normalize-path')
const debugLog = require('debug')('lint-staged:resolveGitRepo')
const fs = require('fs')
const path = require('path')
const { promisify } = require('util')
const execGit = require('./execGit')
const { readFile } = require('./file')
const fsLstat = promisify(fs.lstat)
/**
* Resolve path to the .git directory, with special handling for
* submodules and worktrees
*/
const resolveGitConfigDir = async (gitDir) => {
const defaultDir = normalize(path.join(gitDir, '.git'))
const stats = await fsLstat(defaultDir)
// If .git is a directory, use it
if (stats.isDirectory()) return defaultDir
// Otherwise .git is a file containing path to real location
const file = (await readFile(defaultDir)).toString()
return path.resolve(gitDir, file.replace(/^gitdir: /, '')).trim()
}
const determineGitDir = (cwd, relativeDir) => {
if (relativeDir) {
// the current working dir is inside the git top-level directory
return normalize(cwd.substring(0, cwd.lastIndexOf(relativeDir)))
} else {
// the current working dir is the top-level git directory
return normalize(cwd)
}
}
/**
* Resolve git directory and possible submodule paths
*/
const resolveGitRepo = async (cwd = process.cwd()) => {
try {
debugLog('Resolving git repo from `%s`', cwd)
// Unset GIT_DIR before running any git operations in case it's pointing to an incorrect location
debugLog('Unset GIT_DIR (was `%s`)', process.env.GIT_DIR)
delete process.env.GIT_DIR
debugLog('Unset GIT_WORK_TREE (was `%s`)', process.env.GIT_WORK_TREE)
delete process.env.GIT_WORK_TREE
// read the path of the current directory relative to the top-level directory
// don't read the toplevel directly, it will lead to an posix conform path on non posix systems (cygwin)
const gitRel = normalize(await execGit(['rev-parse', '--show-prefix']))
const gitDir = determineGitDir(cwd, gitRel)
const gitConfigDir = normalize(await resolveGitConfigDir(gitDir))
debugLog('Resolved git directory to be `%s`', gitDir)
debugLog('Resolved git config directory to be `%s`', gitConfigDir)
return { gitDir, gitConfigDir }
} catch (error) {
debugLog('Failed to resolve git repo with error:', error)
return { error, gitDir: null, gitConfigDir: null }
}
}
module.exports = resolveGitRepo