Extract Subversion log data

svn_log_to_json.rb

require 'fileutils'
require 'json'

# LOG = ARGF.read.freeze
LOG = File.read('log.txt')

COMMIT_PATTERN = /
  \A
  r(?<revision>\d+)
    \s\|\s
    (?<author>\w+)
    \s\|\s
    (?<date>\d{4}-\d{2}-\d{2})\s
    (?<time>\d{2}:\d{2}:\d{2})\s
    (?<tz>[\-\+]\d{4})
    \s.+?
    \s\|\s
    \d+\slines?\n*
  (?<message>.+)?
  \Z
/mx

raw_commits = LOG.split(/\-{72}/)
  .reject { |commit| commit.strip == '' }
commits = raw_commits.map do |raw_commit|
  commit = raw_commit.strip.match(COMMIT_PATTERN)

  {
    author: commit[:author],
    date: "#{commit[:date]}T#{commit[:time]}#{commit[:tz]}",
    message: commit[:message],
    revision: commit[:revision],
  }
end

project = File.basename(FileUtils.pwd)
File.open("#{project}.json", 'w') { |f| f.write(JSON.dump(commits)) }