/// <summary>
/// Fast forwarding means making the
/// current branch reflect the commit that `giverHash` points at. No
/// new commit is created.
/// </summary>
public static void WriteFastForwardMerge(string receiverHash, string giverHash)
{
// Point head at `giverHash`.
Refs.Write(Refs.ToLocalRef(Refs.HeadBranchName()), giverHash);
// Make the index mirror the content of `giverHash`.
Index.Write(Index.TocToIndex(Objects.CommitToc(giverHash)));
// If the repo is bare, it has no working copy, so there is no
// more work to do. If the repo is not bare...
if (!Config.Read().Bare)
{
// ...Get an object that maps from file paths in the
// `receiverHash` commit to hashes of the files' content. If
// `recevierHash` is undefined, the repository has no commits,
// yet, and the mapping object is empty.
var receiverToc =
receiverHash == null
? new Dictionary <string, string>()
: Objects.CommitToc(receiverHash);
// ...and write the content of the files to the working copy.
WorkingCopy.Write(Diff.TocDiff(receiverToc, Objects.CommitToc(giverHash)));
}
}
public static string Hash(string refOrHash)
{
/*if (objects.exists(refOrHash)) {
* return refOrHash;
* } else {
* var terminalRef = refs.terminalRef(refOrHash);
* if (terminalRef === "FETCH_HEAD") {
* return refs.fetchHeadBranchToMerge(refs.headBranchName());
* } else if (refs.exists(terminalRef)) {
* return files.read(files.gitletPath(terminalRef));
* }
* }*/
if (Objects.Exists(refOrHash))
{
return(refOrHash);
}
var terminalRef = Refs.TerminalRef(refOrHash);
if (terminalRef == "FETCH_HEAD")
{
return(Refs.FetchHeadBranchToMerge(Refs.HeadBranchName()));
}
if (Refs.Exists(terminalRef))
{
return(Files.Read(Path.Combine(Files.GitletPath(), terminalRef)));
}
return(null);
}
public static void Write(string @ref, string content)
{
if (Refs.IsRef(@ref))
{
Files.Write(Path.Combine(Files.GitletPath(), @ref), content);
}
}
public static void Rm(string @ref)
{
if (Refs.IsRef(@ref))
{
File.Delete(Path.Combine(Files.GitletPath(), @ref));
}
}
private static string[] ToBeCommitted()
{
var headHash = Refs.Hash("HEAD");
var headToc = headHash == null ? new Dictionary <string, string>() : Objects.CommitToc(headHash);
var ns = Diff.NameStatus(Diff.TocDiff(headToc, Index.Toc()));
return(ns.Select(item => item.Value.Value + " " + item.Key).ToArray());
}
public static string[] AddedOrModifiedFiles()
{
var headToc = Refs.Hash("HEAD") != null?Objects.CommitToc(Refs.Hash("HEAD")) : new Dictionary <string, string>();
var wc = Diff.NameStatus(Diff.TocDiff(headToc, Index.WorkingCopyToc()));
return(wc.Where(item => item.Value != FileStatus.DELETE).Select(item => item.Key).ToArray());
}
/// <summary>
/// Gets a list of files
/// changed in the working copy. It gets a list of the files that
/// are different in the head commit and the commit for the passed
/// hash. It returns a list of paths that appear in both lists.
/// </summary>
public static string[] ChangedFilesCommitWouldOverwrite(string hash)
{
var headHash = Refs.Hash("HEAD");
return
(Diff.NameStatus(Diff.GetDiff(headHash)).Keys
.Intersect(Diff.NameStatus(Diff.GetDiff(headHash, hash)).Keys)
.ToArray());
}
public static string Get()
{
var lines =
new[] { "On branch " + Refs.HeadBranchName() }
.Concat(Listing("Untracked files: ", Untracked()))
.Concat(Listing("Unmerged paths: ", Index.ConflictedPaths()))
.Concat(Listing("Changes to be committed: ", ToBeCommitted()))
.Concat(Listing("Changes not staged for commit: ", NotStagedForCommit()));
return(string.Join("\n", lines));
}
/// <summary>
/// creates a message for the merge commit that
/// will potentially be created when the `giverHash` commit is merged
/// into the `receiverHash` commit. It writes this message to
/// `.gitlet/MERGE_MSG`.
/// </summary>
private static void WriteMergeMsg(string receiverHash, string giverHash, string @ref)
{
var msg = "Merge " + @ref + " into " + Refs.HeadBranchName();
var mergeDiff = Merge.MergeDiff(receiverHash, giverHash);
var conflicts = mergeDiff.Where(item => item.Value.Status == Diff.FileStatus.CONFLICT).ToList();
if (conflicts.Any())
{
msg += "\nConflicts:\n" + string.Join("\n", conflicts);
}
Files.Write(Path.Combine(Files.GitletPath(), "MERGE_MSG"), msg);
}
public static string[] CommitParentHashes()
{
var headHash = Refs.Hash("HEAD");
// If the repository is in the middle of a merge, return the
// hashes of the two commits being merged.
if (Merge.IsMergeInProgress())
{
return(new[] { headHash, Refs.Hash("MERGE_HEAD") });
}
// If this repository has no commits, return an empty array.
if (headHash == null)
{
return(new string[0]);
}
// Otherwise, return the hash of the commit that `HEAD` is
// currently pointing at.
return(new[] { headHash });
}
public static void WriteNonFastForwardMerge(string receiverHash, string giverHash, string giverRef)
{
// Write `giverHash` to `.gitlet/MERGE_HEAD`. This file acts as a
// record of `giverHash` and as the signal that the repository is
// in the merging state.
Refs.Write("MERGE_HEAD", giverHash);
// Write a standard merge commit message that will be used when
// the merge commit is created.
Merge.WriteMergeMsg(receiverHash, giverHash, giverRef);
// Merge the `receiverHash` commit with the `giverHash` commit and
// write the content to the index.
Merge.WriteIndex(receiverHash, giverHash);
// If the repo is bare, it has no working copy, so there is no
// more work to do. If the repo is not bare...
if (!Config.Read().Bare)
{
// ...merge the `receiverHash` commit with the `giverHash`
// commit and write the content to the working copy.
WorkingCopy.Write(Merge.MergeDiff(receiverHash, giverHash));
}
}
/// <summary>
/// returns true if the repository is in the middle of a merge.
/// </summary>
/// <returns></returns>
public static bool IsMergeInProgress()
{
return(Refs.Hash("MERGE_HEAD") != null);
}
private static bool Exists(string @ref)
{
return(Refs.IsRef(@ref) && File.Exists(Path.Combine(Files.GitletPath(), @ref)));
}
