forked from enviPath/enviPy
48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
var fs = require('fs');
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var path = require('path');
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// branch naming only has a few excluded characters, see git-check-ref-format(1)
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var REGEX_BRANCH = /^ref: refs\/heads\/([^?*\[\\~^:]+)$/;
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module.exports = function detectLocalGit() {
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var dir = process.cwd(), gitDir;
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while (path.resolve('/') !== dir) {
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gitDir = path.join(dir, '.git');
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var existsSync = fs.existsSync || path.existsSync;
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if (existsSync(path.join(gitDir, 'HEAD')))
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break;
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dir = path.dirname(dir);
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}
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if (path.resolve('/') === dir)
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return;
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var head = fs.readFileSync(path.join(dir, '.git', 'HEAD'), 'utf-8').trim();
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var branch = (head.match(REGEX_BRANCH) || [])[1];
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if (!branch)
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return { git_commit: head };
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var commit = _parseCommitHashFromRef(dir, branch);
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return { git_commit: commit, git_branch: branch };
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};
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function _parseCommitHashFromRef(dir, branch) {
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var ref = path.join(dir, '.git', 'refs', 'heads', branch);
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if (fs.existsSync(ref)) {
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return fs.readFileSync(ref, 'utf-8').trim();
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} else {
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// ref does not exist; get it from packed-refs
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var commit = '';
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var packedRefs = path.join(dir, '.git', 'packed-refs');
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var packedRefsText = fs.readFileSync(packedRefs, 'utf-8');
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packedRefsText.split('\n').forEach(function (line) {
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if (line.match('refs/heads/'+branch)) {
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commit = line.split(' ')[0];
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}
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});
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return commit;
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}
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}
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