class Git::Branch

# File lib/git/branch.rb, line 80
def initialize(base, branch_info_or_name)
  @base = base
  @gcommit = nil
  @stashes = nil

  initialize_from_argument(branch_info_or_name)
end

Initialize a new Branch object

@param base [Git::Repository] the git repository

@param branch_info_or_name [Git::BranchInfo, String] branch info object or name string

Passing a BranchInfo is preferred; String support is for backward compatibility.

@note Use {Git::Repository#branch} or {Git::Repository#branches} instead of constructing directly

@api private

# File lib/git/branch.rb, line 175
def archive(file, opts = {})
  branch_repository.archive(@full, file, opts)
end

Archives this branch and writes the result to a file

@example Archive to a tar file

git.branch('main').archive('/tmp/main.tar', format: 'tar')

@example Archive to a zip file

git.branch('main').archive('/tmp/main.zip', format: 'zip')

@example Archive a remote branch to a tgz file

git.remote('origin').branch('main').archive('/tmp/main.tgz', format: 'tgz')

@param file [String] path to the destination archive file

@param opts [Hash] archive options (see {Git::Repository#archive})

@option opts [String] :format (‘zip’) archive format for this wrapper:

`'tar'`, `'zip'`, or `'tgz'`

@option opts [String] :prefix (nil) prefix prepended to every filename

in the archive

@option opts [String] :path (nil) path within the tree to include in the

archive

@option opts [String] :remote (nil) retrieve the archive from a remote

repository

@option opts [Boolean, nil] :add_gzip (nil) apply gzip compression after

writing the archive; set automatically when `format: 'tgz'` is given

@return [String] the path to the written archive file

@raise [ArgumentError] when archive options or destination path are invalid

@raise [Git::FailedError] if ‘git archive` fails

# File lib/git/branch.rb, line 134
def checkout
  check_if_create
  branch_repository.checkout(@full)
end

Checks out this branch, attempting to create it first if it does not already exist

Branch creation is attempted via {#check_if_create}; any error from that step is silently ignored and the checkout proceeds regardless.

Note: for remote-tracking branches (where {#remote} is not ‘nil`), `check_if_create` will attempt to create a local branch named {#name} as a side-effect before checking out {#full} (which typically results in a detached HEAD). This is a known limitation; see [ruby-git#1280](github.com/ruby-git/ruby-git/issues/1280).

@example Check out a branch

git = Git.open('.')
git.branch('main').checkout

@return [String] git’s stdout from the checkout

@raise [Git::FailedError] if git exits with a non-zero exit status

# File lib/git/branch.rb, line 286
def contains?(commit)
  !branch_repository.branch_contains(commit, name).empty?
end

Returns true if this branch contains the given commit

Note: this queries local branches by short name. For a remote-tracking branch (where {#remote} is not ‘nil`), it checks the local branch with the same {#name} rather than the remote-tracking ref, which may give an inaccurate result.

@example Check if a commit is reachable from this branch

git.branch('main').contains?('abc1234') #=> true

@param commit [String] the commit SHA or ref to check

@return [Boolean] whether this branch contains the given commit

@raise [Git::FailedError] if git exits with a non-zero exit status

# File lib/git/branch.rb, line 227
def create
  check_if_create
end

Creates this branch if it does not already exist

Silently ignores any error raised during branch creation (including the case where the branch already exists).

@example Create a new branch

git.branch('feature').create

@return [nil]

# File lib/git/branch.rb, line 266
def current # rubocop:disable Naming/PredicateMethod
  branch_repository.current_branch == @name
end

Returns true if this is the currently checked-out branch

Note: this compares the current branch’s short name against {#name}. For a remote-tracking branch (where {#remote} is not ‘nil`), {#name} is still the bare short name (e.g. `’main’‘), so this will return `true` whenever the local branch with that name is checked out — not the remote-tracking ref itself.

@example Check whether currently on main

git.branch('main').current #=> true

@return [Boolean] whether this branch is currently checked out

@raise [Git::FailedError] if git exits with a non-zero exit status

# File lib/git/branch.rb, line 243
def delete
  if @remote
    branch_repository.branch_delete("#{@remote.name}/#{@name}", remotes: true)
  else
    branch_repository.branch_delete(@name)
  end
end

Deletes this branch

Remote-tracking branches (one where {#remote} is not ‘nil`) delete the local remote-tracking ref; they do not push a deletion to the remote.

@example Delete a local branch

git.branch('old-feature').delete

@return [String] git’s deletion output

@raise [Git::Error] if the branch cannot be deleted

# File lib/git/branch.rb, line 97
def gcommit
  @gcommit ||= branch_repository.gcommit(@full)
  @gcommit
end

Returns the commit at the tip of this branch

The result is memoized after the first call.

@example Get the tip commit

git.branch('main').gcommit #=> #<Git::Object ...>

@return [Git::Object] the commit at the tip of this branch

# File lib/git/branch.rb, line 206
def in_branch(message = 'in branch work')
  old_current = branch_repository.current_branch
  checkout
  if yield
    branch_repository.commit_all(message)
  else
    branch_repository.reset(nil, hard: true)
  end
  branch_repository.checkout(old_current)
end

Checks out this branch for the duration of a block, then restores the original branch

If the block returns a truthy value, all pending changes are committed with the given message before switching back to the original branch. If the block returns a falsy value, a hard reset is performed before switching back.

Note: the restore checkout is not wrapped in ‘ensure`. If the block, the commit, or the reset raises an exception, the repository will be left checked out on this branch rather than restored to the original.

@example Commit a new file on a feature branch

git.branch('feature').in_branch('Add README') do
  File.write('README.md', '# Hello')
  git.add('README.md')
  true  # commit and return to original branch
end

@param message [String] commit message used when the block returns truthy

@return [String] git’s stdout from the final checkout back to the original branch

@raise [Git::FailedError] if any of the underlying git operations (checkout, commit, reset) fail

@yield Executes the block with this branch checked out

@yieldreturn [Object] return a truthy value to commit all changes, a falsy value to hard-reset

# File lib/git/branch.rb, line 321
def merge(branch = nil, message = nil)
  if branch
    in_branch do
      branch_repository.merge(branch, message)
      false
    end
    # merge a branch into this one
  else
    # merge this branch into the current one
    branch_repository.merge(@name)
  end
end

Merges a branch into this branch, or merges this branch into the current branch

@overload merge(branch, message = nil)

Temporarily checks out this branch, merges the given branch into it,
then restores the original branch.

**Note:** if `self` is a remote-tracking branch (where {#remote} is not
`nil`), this delegates to {#checkout} which has the detached-HEAD
side-effect described there. The remote-tracking ref will not be updated.

@example Merge a feature branch into main
  git.branch('main').merge('feature')

@param branch [String] the name of the branch to merge into this one

@param message [String, nil] commit message for the merge commit

@return [String] git's stdout from the final checkout back to the original branch

@overload merge()

Merges this branch into the currently checked-out branch.

@example Merge main into the current branch
  git.branch('main').merge

@return [String] git's stdout from the merge command

@raise [Git::FailedError] if git exits with a non-zero exit status

# File lib/git/branch.rb, line 111
def stashes
  @stashes ||= Git::Stashes.new(branch_repository)
end

Returns the stash list for this repository

The result is memoized after the first call.

@example Iterate over stash entries

git.branch('main').stashes.each { |s| puts s }

@return [Git::Stashes] the stash list

# File lib/git/branch.rb, line 369
def to_a
  [@full]
end

Returns this branch as a single-element array containing its full refname

@example Get branch as array

git.branch('main').to_a #=> ['main']

@return [Array<String>] a single-element array containing the full refname

# File lib/git/branch.rb, line 380
def to_s
  @full
end

Returns the full refname of this branch as a string

@example Get branch as string

git.branch('main').to_s #=> 'main'

@return [String] the full refname

# File lib/git/branch.rb, line 354
def update_ref(commit)
  if @remote
    branch_repository.update_ref("remotes/#{@remote.name}/#{@name}", commit)
  else
    branch_repository.update_ref(@name, commit)
  end
end

Updates the git ref for this branch to point to the given commit

The target ref depends on whether {#remote} is set:

• When {#remote} is not ‘nil` (i.e. the branch was initialized with a `remotes/<remote>/` or `refs/remotes/<remote>/` prefix), updates `refs/remotes/<remote>/<name>`.

• Otherwise updates ‘refs/heads/<name>`. Note that branches in the `<remote>/<branch>` form (e.g. those returned by {Git::Remote#branch}) have `remote == nil` and therefore update `refs/heads/<remote>/<name>`, not `refs/remotes/…`.

@example Advance a local branch to a new commit

git.branch('feature').update_ref('abc1234def5678')

@param commit [String] the commit SHA to point this branch at

@return [Git::CommandLine::Result] the result of calling ‘git update-ref`

@raise [Git::FailedError] if git exits with a non-zero exit status

# File lib/git/branch.rb, line 490
def branch_repository
  @base
end

@return [Git::Repository]

@api private

# File lib/git/branch.rb, line 480
def check_if_create
  branch_repository.branch_new(@name)
rescue StandardError
  nil
end

Creates the branch if it does not already exist, ignoring errors

@return [nil]

# File lib/git/branch.rb, line 416
def initialize_from_argument(branch_info_or_name)
  if branch_info_or_name.is_a?(Git::BranchInfo)
    initialize_from_branch_info(branch_info_or_name)
  else
    initialize_from_name(branch_info_or_name)
  end
end

Dispatches initialization to the appropriate strategy

@param branch_info_or_name [Git::BranchInfo, String] branch info or name string

@return [nil]

@api private

# File lib/git/branch.rb, line 430
def initialize_from_branch_info(branch_info)
  @name = branch_info.short_name
  @remote = branch_info.remote_name ? Git::Remote.new(@base, branch_info.remote_name) : nil
  @full = @remote ? "remotes/#{@remote.name}/#{@name}" : @name
end

Initialize from a BranchInfo object (preferred path)

@param branch_info [Git::BranchInfo] the branch info

@return [nil]

# File lib/git/branch.rb, line 442
def initialize_from_name(name)
  @full = name
  @remote, @name = parse_name(name)
end

Initialize from a string name (legacy path for backward compatibility)

@param name [String] the branch name

@return [nil]

# File lib/git/branch.rb, line 468
def parse_name(name)
  # Expect this will always match
  match = name.match(BRANCH_NAME_REGEXP)
  remote = match[:remote_name] ? Git::Remote.new(@base, match[:remote_name]) : nil
  branch_name = match[:branch_name]
  [remote, branch_name]
end

Parses a full branch name into remote and short branch name components

Strips an optional ‘remotes/` or `refs/remotes/` prefix. Only inputs that begin with one of those prefixes yield a remote object; all other inputs (including `’origin/master’‘) are treated as local branch names with a `nil` remote.

@example Local branches

parse_name('master')            #=> [nil, 'master']
parse_name('origin/master')     #=> [nil, 'origin/master']

@example Remote-tracking branches

parse_name('remotes/origin/master')      #=> [#<Git::Remote 'origin'>, 'master']
parse_name('refs/remotes/origin/master') #=> [#<Git::Remote 'origin'>, 'master']

@param name [String] the full branch name to parse

@return [Array(Git::Remote, String)] a two-element array; the first element is

a {Git::Remote} for remote-tracking branches or `nil` for local branches,
and the second element is the short branch name