1 | var fs = require('fs');
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2 | var path = require('path');
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3 |
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4 |
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5 | var REGEX_BRANCH = /^ref: refs\/heads\/([^?*\[\\~^:]+)$/;
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6 |
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7 | module.exports = function detectLocalGit() {
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8 | var dir = process.cwd(), gitDir;
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9 | while (path.resolve('/') !== dir) {
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10 | gitDir = path.join(dir, '.git');
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11 | var existsSync = fs.existsSync || path.existsSync;
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12 | if (existsSync(path.join(gitDir, 'HEAD')))
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13 | break;
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14 |
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15 | dir = path.dirname(dir);
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16 | }
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17 |
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18 | if (path.resolve('/') === dir)
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19 | return;
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20 |
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21 | var head = fs.readFileSync(path.join(dir, '.git', 'HEAD'), 'utf-8').trim();
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22 | var branch = (head.match(REGEX_BRANCH) || [])[1];
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23 | if (!branch)
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24 | return { git_commit: head };
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25 |
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26 | var commit = _parseCommitHashFromRef(dir, branch);
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27 |
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28 | return { git_commit: commit, git_branch: branch };
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29 | };
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30 |
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31 | function _parseCommitHashFromRef(dir, branch) {
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32 | var ref = path.join(dir, '.git', 'refs', 'heads', branch);
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33 | if (fs.existsSync(ref)) {
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34 | return fs.readFileSync(ref, 'utf-8').trim();
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35 | } else {
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36 |
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37 | var commit = '';
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38 | var packedRefs = path.join(dir, '.git', 'packed-refs');
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39 | var packedRefsText = fs.readFileSync(packedRefs, 'utf-8');
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40 | packedRefsText.split('\n').forEach(function (line) {
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41 | if (line.match('refs/heads/'+branch)) {
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42 | commit = line.split(' ')[0];
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43 | }
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44 | });
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45 | return commit;
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46 | }
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47 | }
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