ruby--ruby/tool/file2lastrev.rb

#!/usr/bin/env ruby

# Gets the most recent revision of a file in a VCS-agnostic way.
# Used by Doxygen, Makefiles and merger.rb.

require 'optparse'

# this file run with BASERUBY, which may be older than 1.9, so no
# require_relative
require File.expand_path('../lib/vcs', __FILE__)

Program = $0

@output = nil
def self.output=(output)
  if @output and @output != output
    raise "you can specify only one of --changed, --revision.h and --doxygen"
  end
  @output = output
end
@suppress_not_found = false
@limit = 20

format = '%Y-%m-%dT%H:%M:%S%z'
vcs = nil
OptionParser.new {|opts|
  opts.banner << " paths..."
  vcs_options = VCS.define_options(opts)
  srcdir = nil
  opts.new
  opts.on("--srcdir=PATH", "use PATH as source directory") do |path|
    abort "#{File.basename(Program)}: srcdir is already set" if srcdir
    srcdir = path
  end
  opts.on("--changed", "changed rev") do
    self.output = :changed
  end
  opts.on("--revision.h", "RUBY_REVISION macro") do
    self.output = :revision_h
  end
  opts.on("--doxygen", "Doxygen format") do
    self.output = :doxygen
  end
  opts.on("--modified[=FORMAT]", "modified time") do |fmt|
    self.output = :modified
    format = fmt if fmt
  end
  opts.on("--limit=NUM", "limit branch name length (#@limit)", Integer) do |n|
    @limit = n
  end
  opts.on("-q", "--suppress_not_found") do
    @suppress_not_found = true
  end
  opts.order! rescue abort "#{File.basename(Program)}: #{$!}\n#{opts}"
  begin
    vcs = VCS.detect(srcdir || ".", vcs_options, opts.new)
  rescue VCS::NotFoundError => e
    abort "#{File.basename(Program)}: #{e.message}" unless @suppress_not_found
    opts.remove
    (vcs = VCS::Null.new(nil)).set_options(vcs_options)
  end
}

output =
  case @output
  when :changed, nil
    Proc.new {|last, changed|
      changed
    }
  when :revision_h
    Proc.new {|last, changed, modified, branch, title|
      vcs.revision_header(last, modified, modified, branch, title, limit: @limit)
    }
  when :doxygen
    Proc.new {|last, changed|
      "r#{changed}/r#{last}"
    }
  when :modified
    Proc.new {|last, changed, modified|
      modified.strftime(format)
    }
  else
    raise "unknown output format `#{@output}'"
  end

ok = true
(ARGV.empty? ? [nil] : ARGV).each do |arg|
  begin
    puts output[*vcs.get_revisions(arg)]
  rescue => e
    warn "#{File.basename(Program)}: #{e.message}"
    ok = false
  end
end
exit ok