Class: Gjp::Project

Inherits:
Object
  • Object
show all
Includes:
Logger
Defined in:
lib/gjp/project.rb

Overview

encapsulates a Gjp project directory

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Logger

log, #log

Constructor Details

#initialize(path) ⇒ Project

Returns a new instance of Project.



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# File 'lib/gjp/project.rb', line 13

def initialize(path)      
  @full_path = Gjp::Project.find_project_dir(File.expand_path(path))
  @git = Gjp::Git.new(@full_path)
end

Instance Attribute Details

#full_path ⇒ Object

Returns the value of attribute full_path.



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# File 'lib/gjp/project.rb', line 10

def full_path
  @full_path
end

#git ⇒ Object

Returns the value of attribute git.



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# File 'lib/gjp/project.rb', line 11

def git
  @git
end

Class Method Details

.find_project_dir(starting_dir) ⇒ Object

finds the project directory up in the tree, like git does

Raises:



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# File 'lib/gjp/project.rb', line 27

def self.find_project_dir(starting_dir)
  result = starting_dir
  while is_project(result) == false && result != "/"
    result = File.expand_path("..", result)
  end

  raise NoProjectDirectoryError.new(starting_dir) if result == "/"

  result
end

.init(dir) ⇒ Object

inits a new project directory structure



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# File 'lib/gjp/project.rb', line 63

def self.init(dir)
  Dir.chdir(dir) do
    Gjp::Git.new(".").init

    FileUtils.mkdir_p "src"
    FileUtils.mkdir_p "kit"

    # populate the project with templates and take a snapshot
    project = Project.new(".")

    template_manager = Gjp::TemplateManager.new
    template_manager.copy "output", "."
    template_manager.copy "kit", "."
    template_manager.copy "src", "."
    template_manager.copy "gitignore", ".gitignore"

    project.take_snapshot "Template files added", :init
  end
end

.is_project(dir) ⇒ Object

returns true if the specified directory is a valid gjp project



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# File 'lib/gjp/project.rb', line 39

def self.is_project(dir)
  File.directory?(File.join(dir, "src")) &&
  File.directory?(File.join(dir, "kit")) &&
  File.directory?(File.join(dir, ".git"))
end

Instance Method Details

#dry_run ⇒ Object

starts a dry running phase: files added to kit/ will be added to the kit package, src/ will be reset at the current state when finished



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# File 'lib/gjp/project.rb', line 86

def dry_run
  if is_dry_running
    return false
  end

  current_directory = Pathname.new(Dir.pwd).relative_path_from Pathname.new(@full_path)

  take_snapshot("Dry-run started", :dry_run_started, current_directory)
  true
end

#finish(abort) ⇒ Object

ends a dry-run. if abort is true, reverts the whole directory if abort is false, reverts sources and updates output file lists



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# File 'lib/gjp/project.rb', line 105

def finish(abort)
  if is_dry_running
    if abort
      @git.revert_whole_directory(".", latest_tag(:dry_run_started))
      @git.delete_tag(latest_tag(:dry_run_started))
    else
      take_snapshot "Changes during dry-run", :dry_run_changed

      @git.revert_whole_directory("src", latest_tag(:dry_run_started))

      take_snapshot "Dry run finished", :dry_run_finished
    end
    return true
  end
  false
end

#from_directory(subdirectory = "") ⇒ Object

runs a block from the project directory or a subdirectory



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# File 'lib/gjp/project.rb', line 179

def from_directory(subdirectory = "")
  Dir.chdir(File.join(@full_path, subdirectory)) do
    yield
  end
end

#get_package_name(dir) ⇒ Object

returns the package name corresponding to the specified dir, if any raises NoPackageDirectoryError if dir is not a (sub)directory of a package



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# File 'lib/gjp/project.rb', line 47

def get_package_name(dir)
  begin
    dir_path = Pathname.new(File.expand_path(dir)).relative_path_from(Pathname.new(@full_path))
    components = dir_path.to_s.split(File::SEPARATOR)

    if components.count >= 2 && components.first == "src" && Dir.exist?(File.join(@full_path, components[0], components[1]))
      components[1]
    else
      raise NoPackageDirectoryError
    end
  rescue ArgumentError, NoProjectDirectoryError
    raise NoPackageDirectoryError.new(dir)
  end
end

#get_produced_files(package) ⇒ Object

returns a list of files produced during dry-runs in a certain package



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# File 'lib/gjp/project.rb', line 191

def get_produced_files(package)
  dry_run_count = latest_tag_count(:dry_run_changed)
  log.debug "Getting produced files from #{dry_run_count} dry runs"
  if dry_run_count >= 1
    package_dir = File.join("src", package)
    (1..dry_run_count).map do |i|
      @git.changed_files_between("dry_run_started_#{i}", "dry_run_changed_#{i}", package_dir)
    end
      .flatten
      .uniq
      .sort
      .map { |file| Pathname.new(file).relative_path_from(Pathname.new(package_dir)).to_s }
  else
    []
  end
end

#is_dry_running ⇒ Object

returns true iff we are currently dry-running



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# File 'lib/gjp/project.rb', line 98

def is_dry_running
  latest_tag_count(:dry_run_started) > latest_tag_count(:dry_run_finished)
end

#latest_dry_run_directory ⇒ Object

returns the latest dry run start directory



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# File 'lib/gjp/project.rb', line 186

def latest_dry_run_directory
  @git.get_message(latest_tag(:dry_run_started))
end

#latest_tag(prefix) ⇒ Object

returns the tag with maximum count for a given tag prefix



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# File 'lib/gjp/project.rb', line 169

def latest_tag(prefix)
  "#{prefix}_#{latest_tag_count(prefix)}"
end

#latest_tag_count(prefix) ⇒ Object

returns the maximum tag count for a given tag prefix



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# File 'lib/gjp/project.rb', line 174

def latest_tag_count(prefix)
  @git.get_tag_maximum_suffix(prefix)
end

#merge_new_content(new_content, path, snapshot_message, tag_prefix) ⇒ Object

replaces content in path with new_content, takes a snapshot using snapshot_message and tag_prefix and 3-way merges new and old content with a previous snapshotted file same path tag_prefix, if it exists. returns the number of conflicts



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# File 'lib/gjp/project.rb', line 137

def merge_new_content(new_content, path, snapshot_message, tag_prefix)
  from_directory do
    log.debug "merging new content to #{path} with prefix #{tag_prefix}"
    already_existing = File.exist? path
    previous_tag = latest_tag(tag_prefix)

    if already_existing
      log.debug "moving #{path} to #{path}.gjp_user_edited"
      File.rename path, "#{path}.gjp_user_edited"
    end

    File.open(path, "w") { |io| io.write(new_content) }
    log.debug "taking snapshot with new content: #{snapshot_message}"
    take_snapshot(snapshot_message, tag_prefix)

    if already_existing
      if previous_tag == ""
        previous_tag = latest_tag(tag_prefix)
        log.debug "there was no tag with prefix #{tag_prefix} before snapshot"
        log.debug "defaulting to #{previous_tag} after snapshot"
      end

      # 3-way merge
      conflict_count = @git.merge_with_tag("#{path}", "#{path}.gjp_user_edited", previous_tag)
      File.delete "#{path}.gjp_user_edited"
      return conflict_count
    end
    return 0
  end
end

#name ⇒ Object 



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# File 'lib/gjp/project.rb', line 18

def name
  File.basename(@full_path)
end

#purge_jars ⇒ Object

moves any .jar from src/ to kit/ and links it back



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# File 'lib/gjp/project.rb', line 209

def purge_jars      
  from_directory do
    result = []
    Find.find("src") do |file|
      if file =~ /.jar$/ && !File.symlink?(file)
        new_location = File.join("kit", "jars", Pathname.new(file).split[1])
        FileUtils.mv(file, new_location)

        link_target = Pathname.new(new_location)
          .relative_path_from(Pathname.new(file).split.first)
          .to_s

        File.symlink(link_target, file)
        result << [file, new_location]
      end
    end

    result
  end
end

#take_snapshot(message, tag_prefix = nil, tag_message = nil) ⇒ Object

takes a revertable snapshot of this project



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# File 'lib/gjp/project.rb', line 123

def take_snapshot(message, tag_prefix = nil, tag_message = nil)
  tag = if tag_prefix
    "#{tag_prefix}_#{latest_tag_count(tag_prefix) + 1}"
  else
    nil
  end

  @git.commit_whole_directory(message, tag, tag_message)
end

#version ⇒ Object 



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# File 'lib/gjp/project.rb', line 22

def version
  latest_tag_count(:dry_run_finished)
end