52 lines
1.2 KiB
JavaScript
52 lines
1.2 KiB
JavaScript
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var cache = require('./mem-cache').cache;
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var modes = require('../lib/modes');
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module.exports = function (repo) {
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repo.pathToEntry = pathToEntry;
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};
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function pathToEntry(rootTree, path, callback) {
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if (!callback) return pathToEntry.bind(this, rootTree, path);
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var repo = this;
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var mode = modes.tree;
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var hash = rootTree;
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var parts = path.split("/").filter(Boolean);
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var index = 0;
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var cached;
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loop();
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function loop() {
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while (index < parts.length) {
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if (mode === modes.tree) {
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cached = cache[hash];
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if (!cached) return repo.loadAs("tree", hash, onLoad);
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var entry = cached[parts[index]];
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if (!entry) return callback();
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mode = entry.mode;
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hash = entry.hash;
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index++;
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continue;
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}
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if (modes.isFile(mode)) return callback();
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return callback(null, {
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last: {
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mode: mode,
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hash: hash,
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path: parts.slice(0, index).join("/"),
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rest: parts.slice(index).join("/"),
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}
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});
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}
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callback(null, {
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mode: mode,
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hash: hash
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});
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}
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function onLoad(err, value) {
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if (!value) return callback(err || new Error("Missing object: " + hash));
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cache[hash] = value;
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loop();
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}
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}
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