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commit.js
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var git = require( '../' ),
success = require('./utilities').success,
events = require('events');
/**
* Convenience commit constructor.
*
* @constructor
* @param {RawCommit|Null} rawCommit
* @return {Commit}
*/
var Commit = function(rawRepo, rawCommit) {
if (!(rawRepo instanceof git.raw.Repo)) {
throw git.error('First parameter for Commit must be a raw repo');
}
this.rawRepo = rawRepo;
if (rawCommit instanceof git.raw.Commit) {
this.rawCommit = rawCommit;
} else {
this.rawCommit = new git.raw.Commit();
}
};
/**
* Look up the commit referenced by oid, replace this.commit with the result.
*
* @param {git.oid|git.raw.Oid|String} oid
* @param {Function} callback
*/
Commit.prototype.lookup = function(oid, callback) {
if (typeof oid !== 'undefined' &&
typeof oid !== 'string' &&
!(oid instanceof git.raw.Oid)) {
oid = oid.getRawOid();
}
var self = this;
self.rawCommit.lookup(self.rawRepo, oid, function commitLookup(error, rawCommit) {
if (success(error, callback)) {
self.rawCommit = rawCommit;
callback(null, self);
}
});
};
/**
* Retrieve the commit's Oid
*
* @param {Function} callback
*/
Commit.prototype.oid = function(callback) {
callback(null, new git.oid(this.rawCommit.oid()));
};
/**
* Retrieve the SHA
*
* @param {Function} callback
*/
Commit.prototype.sha = function(callback) {
this.rawCommit.sha(function(error, sha) {
if (success(error, callback)) {
callback(null, sha);
}
});
};
/**
* Retrieve the message
*
* @param {Function} callback
*/
Commit.prototype.message = function(callback) {
this.rawCommit.message(function(error, message) {
if (success(error, callback)) {
callback(null, message);
}
});
};
/**
* Retrieve the commit unix timestamp.
*
* @param {Function} callback
*/
Commit.prototype.time = function(callback) {
this.rawCommit.time(function(error, time) {
if (success(error, callback)) {
callback(null, time);
}
});
};
/**
* Retrieve the commit's positive or negative timezone offset, in minutes from UTC.
*
* @param {Function} callback
*/
Commit.prototype.offset = function(callback) {
this.rawCommit.offset(function(error, offset) {
if (success(error, callback)) {
callback(null, offset);
}
});
};
/**
* Retrieve the commit's author.
*
* @param {Function} callback
*/
Commit.prototype.author = function(callback) {
this.rawCommit.author(function(error, rawSignature) {
if (success(error, callback)) {
callback(null, new git.raw.signature(rawSignature));
}
});
};
/**
* Retrieve the commit's committer.
*
* @param {Function} callback
*/
Commit.prototype.committer = function(callback) {
this.rawCommit.committer(function(error, rawSignature) {
if (success(error, callback)) {
callback(null, new git.raw.signature(rawSignature));
}
});
};
/**
* Retrieve the tree for this commit.
*
* @param {Function} callback
*/
Commit.prototype.tree = function(callback) {
var self = this;
self.rawCommit.tree(function commitTree(error, rawTree) {
if (success(error, callback)) {
callback(null, new git.tree(self.rawRepo, rawTree));
}
});
};
/**
* Retrieve the author of this commit.
*
* @param {Function} callback
*/
Commit.prototype.tree = function(callback) {
this.rawCommit.author(function(error, author) {
if (success(error, callback)) {
callback(null, author);
}
});
};
/**
* Retrieve the file represented by path for this commit.
*
* @param {String} path
* @param {Function} callback
*/
Commit.prototype.file = function(path, callback) {
this.tree(function commitFile(error, tree) {
if (!success(error, callback)) {
return;
}
tree.entry(path, function(error, entry) {
if (success(error, callback)) {
callback(null, entry);
}
});
});
};
/**
* Walk the history of this commit.
*
* @return {Event} Event emits 'commit', with error, commit and 'end', with
* error, commits[]
*/
Commit.prototype.history = function() {
var event = new events.EventEmitter(),
self = this;
self.oid(function commitOid(error, oid) {
var revwalk = new git.revwalk(self.rawRepo),
commits = [];
revwalk.walk(oid, function commitRevWalk(error, index, commit, noMoreCommits) {
if(error) {
event.emit('end', error, commits);
return false;
}
if (noMoreCommits) {
event.emit('end', null, commits);
return;
}
event.emit('commit', null, commit);
commits.push(commit);
});
});
return event;
};
/**
* Retrieve the commit's parent at the given position asynchronously.
*
* @param {Integer} position
*/
Commit.prototype.parent = function(position, callback) {
self.rawCommit.parent(position, function processParent(error, rawParent) {
if (success(error, callback)) {
callback(null, new Commit(this.rawRepo, rawParent));
}
});
};
/**
* Get a diff tree showing changes between this commit and its parent(s).
*
* @param {Function} callback
*/
Commit.prototype.parentsDiffTrees = function(callback) {
var self = this;
self.sha(function(error, commitSha) {
if (!success(error, callback)) {
return;
}
self.parents(function commitParents(error, parents) {
if (!success(error, callback)) {
return;
}
var parentDiffLists = [];
parents.forEach(function commitEachParent(parent) {
parent.sha(function commitParentSha(error, parentSha) {
(new git.diffList(self.repo)).treeToTree(parentSha, commitSha, function walkDiffList(error, diffList) {
if (!success(error, callback)) {
return;
}
parentDiffLists.push(diffList);
if (parentDiffLists.length === parents.length) {
callback(null, parentDiffLists);
}
});
});
});
});
});
};
exports.commit = Commit;