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commit.js
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188 lines (171 loc) · 4.53 KB
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var git = require( '../' ),
events = require( 'events' );
/**
* Apply given details to the context.
*
* @param {Object} details
* @param {Object} context
* @return {Object} The modified context.
*/
function applyDetails(details, context) {
if (details) {
for (var detailKey in details) {
context[detailKey] = details[detailKey];
}
}
return context;
}
/**
* Convenience commit constructor.
*
* @param {RawCommit|Null} rawCommit
* @return {Commit}
*/
var _Commit = function(rawCommit) {
var self = {};
if(rawCommit && rawCommit instanceof git.raw.Commit) {
self.commit = rawCommit;
} else {
self.commit = new git.raw.Commit();
}
/**
* Fetch the commit's details asynchronously.
*
* @param {Function} callback
*/
self.fetchDetails = function(callback) {
var error = null;
self.commit.fetchDetails(function(error, details) {
if (error) {
error = git.error(error);
}
applyDetails(details, self);
callback(error);
});
};
/**
* Fetch the commit's details synchronously.
*/
self.fetchDetailsSync = function(callback) {
var details = self.commit.fetchDetailsSync();
return applyDetails(details, self);
};
/**
* Look up the commit referenced by oid, replace self.commit
* with the result.
*
* @param {Repo} repo
* @param {Oid|String} oid Raw OID object or SHA string
* @param {Function} callback
*/
self.lookup = function(repo, oid, callback) {
self.repo = repo;
self.commit.lookup(repo, oid, function(error, commit) {
if (error) {
callback(git.error(error), null);
return;
}
self.commit = commit;
self.fetchDetails(function(error) {
if (error) {
callback(git.error(error), null);
return;
}
callback(null, self);
});
});
};
self.tree = function() {
var tree = new git.raw.Tree(self.repo);
if(tree.error) {
return git.error(tree.error);
} else {
self.commit.tree(tree);
}
return git.tree(self.repo, tree);
};
self.file = function(path) {
return self.tree().entry(path);
};
/**
* Walk the history of this commit.
*
* @return {Event} Event emits 'commit', with error, commit and 'end', with
* error, commits[]
*/
self.history = function() {
var revwalk = git.revwalk(self.repo),
event = new events.EventEmitter(),
commits = [];
revwalk.walk(self.id, function(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
*/
self.parent = function(position, callback) {
var parent = null;
self.commit.parent(position, function processParent(errorCode, parent) {
var error = null;
if (errorCode) {
error = git.error(errorCode);
return callback(error, null);
}
var parentCommit = new _Commit(parent);
parentCommit.fetchDetails(function returnParent(error) {
callback(error, parentCommit);
});
});
};
/**
* Retrieve the commit's parent at the given positino synchronously.
*
* @param {Integer} position
* @return {Commit}
*/
self.parentSync = function(position) {
var parent = new _Commit(self.commit.parentSync(position));
return parent.fetchDetailsSync();
};
/**
* Get a diff tree showing changes between this commit and its parent(s).
* Assumes commit has been populated with fetchDetails|fetchDetailsSync
*
* @param {Function} callback Called with error (null if no error) and the
* diff tree
*/
self.parentsDiffTrees = function(callback) {
if (!self.parentCount) {
callback(null, {});
return;
}
var parentDiffLists = [];
self.parentShas.forEach(function eachParentSha(parentSha) {
git.diffList(self.repo).treeToTree(parentSha, self.sha, function walkDiffList(error, diffList) {
if (error) {
callback(error, null);
return;
}
parentDiffLists.push(diffList);
if (parentDiffLists.length === self.parentShas.length) {
callback(null, parentDiffLists);
}
});
});
};
return self;
};
exports.commit = _Commit;