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var exec = require("exec-sync");
var fetchGitData = function(git) {
var i;
var execGit = true;
var head = {
"author_name": {
"format": "'%aN'",
"default": "Unknown Author"
},
"author_email": {
"format": "'%ae'",
"default": ""
},
"committer_name": {
"format": "'%cN'",
"default": "Unknown Committer"
},
"committer_email": {
"format": "'%ce'",
"default" :""
},
"message": {
"format": "'%s'",
"default": "Unknown Commit Message"
}
};
var remotes = {};
//-- Throw an error if no data is passed
if ('undefined' === typeof git) {
throw new Error('No options passed');
//-- Throw an error if no head or head.id is provided
} else if (!git.hasOwnProperty('head')) {
throw new Error('You must provide the head');
} else if (!git.head.hasOwnProperty('id')) {
throw new Error('You must provide the head.id');
}
function saveRemote(name, url, push) {
var key = name + "-" + url;
if ("undefined" === typeof push || "boolean" !== typeof push) {
push = true;
}
if (!remotes.hasOwnProperty(key)) {
remotes[key] = true;
if (push) {
git.remotes.push({
"name": name,
"url": url
});
}
}
}
//-- Set required properties of git if they weren"t provided
if (!git.hasOwnProperty("head")) {
git.head = {};
}
if (!git.hasOwnProperty("branch")) {
git.branch = "";
}
if (!git.hasOwnProperty("remotes")) {
git.remotes = [];
}
//-- Assert the property types
if ("object" !== typeof git.head) {
git.head = {};
}
if ("string" !== typeof git.branch) {
git.branch = "";
}
if (!git.remotes.hasOwnProperty("length")) {
git.remotes = [];
}
//-- Use git?
try {
exec("git log -1 " + git.head.id + " --pretty=format:'%H'");
} catch (e) {
execGit = false;
}
//-- Head
for (i in head) {
if (!git.head.hasOwnProperty(i)) {
if (execGit) {
git.head[i] = exec("git log -1 " + git.head.id + " --pretty=format:" + head[i].format);
} else {
git.head[i] = head[i].default;
}
}
}
if (execGit) {
//-- Branch
if ("" === git.branch) {
git.branch = exec("git branch").split("\n")[0].replace(/^\*\ /, "").trim();
}
//-- Remotes
if (0 !== git.remotes.length) {
for (i in git.remotes) {
saveRemote(git.remotes[i].name, git.remotes[i].url, false);
}
}
exec("git remote -v").split("\n").forEach(function(remote) {
remote = remote.split(/\s/);
saveRemote(remote[0], remote[1]);
});
}
return git;
};
module.exports = fetchGitData;
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