Class: Kettle::Dev::GitAdapter

Inherits:
Object
  • Object
show all
Defined in:
lib/kettle/dev/git_adapter.rb

Overview

Minimal Git adapter used by kettle-dev to avoid invoking live shell commands
directly from the higher-level library code. In tests, mock this adapter’s
methods to prevent any real network or repository mutations.

Behavior:

  • Prefer the ‘git’ gem when available.
  • If the ‘git’ gem is not present (LoadError), fall back to shelling out to
    the system git executable for the small set of operations we need.

Public API is intentionally small and only includes what we need right now.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ void

Create a new adapter rooted at the current working directory.



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# File 'lib/kettle/dev/git_adapter.rb', line 55

def initialize
  begin
    # Allow users/CI to opt out of using the 'git' gem even when available.
    # Set KETTLE_DEV_DISABLE_GIT_GEM to a truthy value ("1", "true", "yes") to force CLI backend.
    env_val = ENV["KETTLE_DEV_DISABLE_GIT_GEM"]
    # Ruby 2.3 compatibility: String#match? was added in 2.4; use Regexp#=== / =~ instead
    disable_gem = env_val && !!(/\A(1|true|yes)\z/i =~ env_val)
    if disable_gem
      @backend = :cli
    else
      Kernel.require "git"
      @backend = :gem
      @git = ::Git.open(Dir.pwd)
    end
  rescue LoadError => e
    Kettle::Dev.debug_error(e, __method__)
    # Optional dependency: fall back to CLI
    @backend = :cli
  rescue StandardError => e
    raise Kettle::Dev::Error, "Failed to open git repository: #{e.message}"
  end
end

Instance Method Details

#capture(args) ⇒ Array<(String, Boolean)>

Execute a git command and capture its stdout and success flag.
This is a generic escape hatch used by higher-level code for read-only
queries that aren’t covered by the explicit adapter API. Tests can stub
this method to avoid shelling out.

Parameters:

  • args (Array<String>)

Returns:

  • (Array<(String, Boolean)>) —

    [output, success]



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# File 'lib/kettle/dev/git_adapter.rb', line 45

def capture(args)
  out, status = Open3.capture2("git", *args)
  [out.strip, status.success?]
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  ["", false]
end

#checkout(branch) ⇒ Boolean

Checkout the given branch

Parameters:

  • branch (String)

Returns:

  • (Boolean) 


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# File 'lib/kettle/dev/git_adapter.rb', line 180

def checkout(branch)
  if @backend == :gem
    @git.checkout(branch)
    true
  else
    system("git", "checkout", branch.to_s)
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  false
end

#clean? ⇒ Boolean

Determine whether the working tree is clean (no unstaged, staged, or untracked changes).

Returns:

  • (Boolean) —

    true if clean, false if any changes or on error



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# File 'lib/kettle/dev/git_adapter.rb', line 20

def clean?
  if @backend == :gem
    begin
      status = @git.status
      # git gem's Status responds to changed, added, deleted, untracked, etc.
      status.changed.empty? && status.added.empty? && status.deleted.empty? && status.untracked.empty?
    rescue StandardError => e
      Kettle::Dev.debug_error(e, __method__)
      false
    end
  else
    out, st = Open3.capture2("git", "status", "--porcelain")
    st.success? && out.strip.empty?
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  false
end

#current_branch ⇒ String?

Returns current branch name, or nil on error.

Returns:

  • (String, nil) —

    current branch name, or nil on error



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# File 'lib/kettle/dev/git_adapter.rb', line 108

def current_branch
  if @backend == :gem
    @git.current_branch
  else
    out, status = Open3.capture2("git", "rev-parse", "--abbrev-ref", "HEAD")
    status.success? ? out.strip : nil
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  nil
end

#fetch(remote, ref = nil) ⇒ Boolean

Fetch a ref from a remote (or everything if ref is nil)

Parameters:

  • remote (String)
  • ref (String, nil) (defaults to: nil)

Returns:

  • (Boolean) 


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# File 'lib/kettle/dev/git_adapter.rb', line 212

def fetch(remote, ref = nil)
  if @backend == :gem
    if ref
      @git.fetch(remote, ref)
    else
      @git.fetch(remote)
    end
    true
  elsif ref
    system("git", "fetch", remote.to_s, ref.to_s)
  else
    system("git", "fetch", remote.to_s)
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  false
end

#pull(remote, branch) ⇒ Boolean

Pull from a remote/branch

Parameters:

  • remote (String)
  • branch (String)

Returns:

  • (Boolean) 


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# File 'lib/kettle/dev/git_adapter.rb', line 196

def pull(remote, branch)
  if @backend == :gem
    @git.pull(remote, branch)
    true
  else
    system("git", "pull", remote.to_s, branch.to_s)
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  false
end

#push(remote, branch, force: false) ⇒ Boolean

Push a branch to a remote.

Parameters:

  • remote (String, nil) —

    remote name (nil means default remote)

  • branch (String) —

    branch name (required)

  • force (Boolean) (defaults to: false) —

    whether to force push

Returns:

  • (Boolean) —

    true when the push is reported successful



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# File 'lib/kettle/dev/git_adapter.rb', line 83

def push(remote, branch, force: false)
  if @backend == :gem
    begin
      if remote
        @git.push(remote, branch, force: force)
      else
        # Default remote according to repo config
        @git.push(nil, branch, force: force)
      end
      true
    rescue StandardError => e
      Kettle::Dev.debug_error(e, __method__)
      false
    end
  else
    args = ["git", "push"]
    args << "--force" if force
    if remote
      args << remote.to_s << branch.to_s
    end
    system(*args)
  end
end

#remote_url(name) ⇒ String?

Parameters:

  • name (String)

Returns:

  • (String, nil) 


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# File 'lib/kettle/dev/git_adapter.rb', line 164

def remote_url(name)
  if @backend == :gem
    r = @git.remotes.find { |x| x.name == name }
    r&.url
  else
    out, status = Open3.capture2("git", "config", "--get", "remote.#{name}.url")
    status.success? ? out.strip : nil
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  nil
end

#remotes ⇒ Array<String>

Returns list of remote names.

Returns:

  • (Array<String>) —

    list of remote names



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# File 'lib/kettle/dev/git_adapter.rb', line 121

def remotes
  if @backend == :gem
    @git.remotes.map(&:name)
  else
    out, status = Open3.capture2("git", "remote")
    status.success? ? out.split(/\r?\n/).map(&:strip).reject(&:empty?) : []
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  []
end

#remotes_with_urls ⇒ Hash{String=>String}

Returns remote name => fetch URL.

Returns:

  • (Hash{String=>String}) —

    remote name => fetch URL



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# File 'lib/kettle/dev/git_adapter.rb', line 134

def remotes_with_urls
  if @backend == :gem
    @git.remotes.each_with_object({}) do |r, h|
      begin
        h[r.name] = r.url
      rescue StandardError => e
        Kettle::Dev.debug_error(e, __method__)
        # ignore
      end
    end
  else
    out, status = Open3.capture2("git", "remote", "-v")
    return {} unless status.success?

    urls = {}
    out.each_line do |line|
      # Example: origin https://github.com/me/repo.git (fetch)
      if line =~ /^(\S+)\s+(\S+)\s+\(fetch\)/
        urls[Regexp.last_match(1)] = Regexp.last_match(2)
      end
    end
    urls
  end
rescue StandardError => e
  Kettle::Dev.debug_error(e, __method__)
  {}
end