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config_util.js
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config_util.js
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/*
* Copyright (c) 2018, Two Sigma Open Source
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of git-meta nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
"use strict";
const assert = require("chai").assert;
const co = require("co");
const NodeGit = require("nodegit");
const UserError = require("../../lib/util/user_error");
/**
* This module contains methods for interacting with git configuration entries.
*/
/**
* Return the string in the specified `config` for the specified `key`, or null
* if `key` does not exist in `config`.
*
* @param {NodeGit.Config} config
* @param {String} key
* @return {String|null}
*/
exports.getConfigString = co.wrap(function *(config, key) {
assert.instanceOf(config, NodeGit.Config);
assert.isString(key);
try {
return yield config.getStringBuf(key);
}
catch (e) {
// Unfortunately, no other way to handle a missing config entry
}
return null;
});
/**
* Returns whether a config variable is, according to git's reckoning,
* true. That is, it's set to 'true', 'yes', or 'on'. If the variable is not
* set at all, return null.
* @async
* @param {NodeGit.Repository} repo
* @param {NodeGit.Commit} configVar
* @return {Bool|null}
* @throws if the configuration variable doesn't exist
*/
exports.configIsTrue = co.wrap(function*(repo, configVar) {
assert.instanceOf(repo, NodeGit.Repository);
assert.isString(configVar);
const config = yield repo.config();
const configured = yield exports.getConfigString(config, configVar);
if (null === configured) {
return configured; // RETURN
}
return configured === "true" || configured === "yes" ||
configured === "on";
});
/**
* Returns the default Signature for a repo. Replaces repo.defaultSignature,
* which occasionally returns unknown@example.com for unknown reasons.
* @async
* @param {NodeGit.Repository} repo
* @param {NodeGit.Commit} configVar
* @return {Bool|null}
* @throws if the configuration variable doesn't exist
*/
exports.defaultSignature = co.wrap(function*(repo) {
assert.instanceOf(repo, NodeGit.Repository);
const config = yield repo.config();
const email = yield exports.getConfigString(config, "user.email");
const name = yield exports.getConfigString(config, "user.name");
if (name && email) {
const now = new Date();
const tz = now.getTimezoneOffset();
return NodeGit.Signature.create(name, email, now.getTime() / 1000, tz);
}
throw new UserError("Git config vars user.email and user.name are unset");
});