Class: Init

Inherits:
Object
  • Object
show all
Includes:
GitHelpersMixin
Defined in:
lib/git_bpf/commands/init.rb

Overview

init:

Instance Method Summary collapse

Methods included from GitHelpersMixin

#branchExists?, #context, #promptYN, #refExists?, #terminate

Instance Method Details

#execute(opts, argv) ⇒ Object 



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# File 'lib/git_bpf/commands/init.rb', line 77

def execute(opts, argv)
  if argv.length > 1
    run 'init', '--help'
    terminate
  end

  source_path = File.expand_path("..", File.dirname(__FILE__))
  target = Repository.new(argv.length == 1 ? argv.pop : Dir.getwd)

  # Perform some cleanup in case this repo was previously initalized.
  target.config(true, '--remove-section', 'gitbpf') rescue nil
  removeCommandAliases target
  rmSymlinks(target.git_dir, source_path)

  #
  # 1. Link source scripts directory.
  #
  ohai "1. Linking scripts directory to '#{source_path}'."

  scripts = File.join(target.path, '.git', opts.script_dir_name)

  if not File.exists? scripts
    File.symlink source_path, scripts
  elsif File.symlink? scripts
    opoo "Symbolic link already exists."
  else
    terminate "Cannot create symbolic link (#{scripts})."
  end


  #
  # 2. Create aliases for commands.
  #
  commands = [
    'recreate-branch',
    'share-rerere',
  ]

  ohai "2. Creating aliases for commands:", commands.shell_list

  commands.each do |name|
    command = "!_git-bpf #{name}"
    target.cmd("config", "--local", "alias.#{name}", command)
  end


  #
  # 3. Set up rerere sharing.
  #
  ohai "3. Setting up rerere sharing."

  target.config(true, "rerere.enabled", "true")
  target.config(true, "rerere.autoupdate", "true")

  target.config(true, "gitbpf.remotename", opts.remote_name)

  rerere_path = File.join(target.git_dir, 'rr-cache')
  target_remote_url = target.remoteUrl(opts.remote_name)

  if not File.directory? rerere_path
    rerere = Repository::clone target_remote_url, rerere_path, opts.remote_name
  elsif not File.directory? File.join(rerere_path, '.git')
    opoo "Rerere cache directory already exists; Initializing repository in existing rr-cache directory."
    rerere = Repository.init rerere_path
    rerere.cmd("remote", "add", opts.remote_name, target_remote_url)
  else
    opoo "Rerere cache directory already exists and is a repository."
    rerere = Repository.new rerere_path
  end

  rerere.fetch opts.remote_name

  if rerere.branch?('rr-cache', opts.remote_name)
    # Remote has branch 'rr-cache', make sure we are currently on it.
    if not rerere.head.include? "rr-cache"
      rerere.cmd("checkout", "rr-cache")
    end
  else
    # Create orphan branch 'rr-cache' and push to remote.
    rerere.cmd("checkout", "--orphan", "rr-cache")
    rerere.cmd("rm", "-rf", "--ignore-unmatch", "#{rerere_path}/")
    rerere.cmd("commit", "-a", "--allow-empty", "-m", "Automatically creating branch to track conflict resolutions.")
    rerere.cmd("push", opts.remote_name, "rr-cache")
  end


  #
  # 4. Symlink git-hooks.
  #
  hooks_dir = File.join(target.git_dir, "hooks")
  hooks = [
    'post-commit',
    'post-checkout'
  ]

  ohai "4. Creating symbolic links to git-hooks:", hooks.shell_list

  hooks.each do |name|
    target_hook_path = File.join(hooks_dir, name)
    source_hook_path = File.join(scripts, "hooks", "#{name}.rb")
    files = Dir.glob("#{target_hook_path}*")
    write = files.empty?

    if not write and promptYN "Existing hook '#{name}' detected, overwrite?"
      write = File.delete(files.shell_s) > 0
    end

    if write
      File.symlink source_hook_path, target_hook_path
    else
      opoo "Couldn't link '#{name}' hook as it already exists."
    end
  end

  #
  # Success!
  #
  ohai "Success!"
end

#options(opts) ⇒ Object 



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# File 'lib/git_bpf/commands/init.rb', line 15

def options(opts)
  opts.script_dir_name = 'git-bpf'
  opts.remote_name = 'origin'
  opts.rerere_branch = 'rr-cache'

  [
    ['-d', '--directory-name NAME',
      "",
      lambda { |n| opts.script_dir_name = n }],
    ['-r', '--remote-name NAME',
      "",
      lambda { |n| opts.remote_name = n }],
    ['-b', '--rerere-branch NAME',
      "",
      lambda { |n| opts.rerere_branch = n }],
  ]
end

#removeCommandAliases(repo) ⇒ Object

Removes all aliases to git-bpf commands.



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# File 'lib/git_bpf/commands/init.rb', line 34

def removeCommandAliases(repo)
  config = repo.config(true, '--list').lines.each do |line|
    next unless line.start_with? 'alias.' and line.match /\!_git\-bpf/
    a = /alias\.([a-zA-Z0-9\-_]+)\=(.)*/.match(line)[1]
    repo.config(true, '--unset', "alias.#{a}")
  end
end

#rmSymlinks(path, source_location) ⇒ Object

Removes all symlinks to targets within source_location that are found within path.



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# File 'lib/git_bpf/commands/init.rb', line 44

def rmSymlinks(path, source_location)
  targets_to_check = [source_location]
  all_targets = []

  # Find all symlink targets that represent a path within source_location.
  while targets_to_check.length > 0
    git_bpf_target = targets_to_check.pop
    Find.find(path) do |p|
      if File.symlink?(p)
        target =  File.readlink(p)
        if target.include? git_bpf_target and not targets_to_check.include? p
          targets_to_check.push p
        end
      end
    end
    all_targets.push git_bpf_target
  end

  # Now delete any symlink whose target path includes any of the paths we
  # have identified.
  Find.find(path) do |p|
    if File.symlink? p
      target = File.readlink p
      all_targets.each do |t|
        if target.include? t
          File.unlink p
          break
        end
      end
    end
  end
end