midwire · August 31, 2021 16:00 · Aug 16, 2016 · Aug 16, 2016 · Aug 16, 2016
diff --git a/git-merged-branches.rb b/git-merged-branches.rb
@@ -0,0 +1,142 @@
+#!/usr/bin/env ruby
+#
+# Get a list of merged branches
+#
+# You need to checkout the target remote branch before running. In other words,
+# if your target branch is 'master', you have to have it checked out before you
+# run this script, otherwise you will get an error like: `fatal: malformed
+# object name master`. Git needs to have the branch checked out in order to find
+# the branches that have/have-not been merged into it.
+#
+# To create a list of branch-names only, without date info
+#
+# git-merged-branches.rb --branch production --exclude-days 180 | cut -f1 -d'|'
+#
+# For help run: git-merged-branches.rb --help
+
+require 'trollop'
+require 'fileutils'
+require 'colored'
+
+class GitMergedBranches
+  attr_accessor :branch_count, :options, :elapsed, :excluded_branches, :matched_count
+
+  include FileUtils
+
+  class BranchEntry
+    attr_accessor :name, :last_commit_date, :relative_last_commit
+
+    def initialize(name, last_commit_date, relative_last_commit)
+      self.name = name
+      self.last_commit_date = last_commit_date
+      self.relative_last_commit = relative_last_commit
+    end
+
+    def <=>(other)
+      self.last_commit_date <=> other.last_commit_date
+    end
+
+    def to_s
+      "#{name} | #{last_commit_date} | #{relative_last_commit}"
+    end
+  end
+
+  class << self
+    def collect_args(*_args)
+      opts = Trollop.options do
+        opt(
+          :branch,
+          'Base branch - list branches merged into this branch. Uses current branch if not specified.',
+          type: :string, short: 'b', required: false
+        )
+        opt(
+          :exclude_days,
+          'Exclude branches that have no commits within this many days',
+          type: :integer, short: 'x', required: false, default: 0
+        )
+        opt(
+          :color,
+          'Use colored output',
+          type: :boolean, short: 'c', required: false, default: true
+        )
+      end
+      # Set branch to current if not given on command line
+      opts[:branch] ||= `git rev-parse --abbrev-ref HEAD`.chomp
+      opts
+    end
+
+    def run
+      start_time = Time.now
+      opts = collect_args(ARGV)
+
+      instance = GitMergedBranches.new(opts)
+      instance.process
+      instance.elapsed = Time.now - start_time
+      instance.report_summary
+    end
+  end
+
+  def initialize(opts)
+    self.branch_count = 0
+    self.excluded_branches = []
+    self.options = opts
+  end
+
+  def color(string, clr)
+    if options[:color]
+      puts(string.send(clr))
+    else
+      puts(string)
+    end
+  end
+
+  def report_summary
+    puts
+    color(">>> Processed #{branch_count} branches in [#{elapsed}] seconds", :red)
+    color(">>> Branches with NO commits in the last #{options[:exclude_days]} days: [#{matched_count}]", :red)
+    color(">>> Branches with commits in the last #{options[:exclude_days]} days: [#{excluded_branches.count}]", :red)
+  end
+
+  def process
+    self.matched_count = matched_branches.count
+    color(">>> #{matched_count} remote branches with no commits in the last #{options[:exclude_days]} days:", :green)
+    puts
+    puts matched_branches.sort
+  end
+
+  def merged_branches
+    @branches ||= begin
+      current_origin = nil
+      cmd = "git branch -r --merged #{options[:branch]}"
+      merged_list = `#{cmd}`.split("\n").collect(&:strip)
+      fail "Error running: #{cmd}. See output above ^^^" unless $?.exitstatus == 0
+      # find and delete the HEAD pointer and current branch origin
+      head_pointer = merged_list.grep(/ -> /).first
+      current_origin = head_pointer.split(/ -> /).last
+      merged_list.delete_if { |elem| [head_pointer, current_origin].include?(elem) }
+    end
+  end
+
+  def matched_branches
+    today = Date.today
+    @sorted ||= merged_branches.map do |branch|
+      self.branch_count += 1
+      date_strings = `git show --format="%ci|%cr" #{branch} | head -n 1`.chomp.split('|')
+      last_commit_date = Date.strptime(date_strings.first, '%Y-%m-%d')
+      days_old = (today - last_commit_date).to_i
+      if recent_branch?(days_old)
+        excluded_branches << branch
+        nil
+      else
+        BranchEntry.new(branch, last_commit_date, date_strings.last)
+      end
+    end.compact
+  end
+
+  # Determine if a branch has any commits within the last options[:exclude_days] days
+  def recent_branch?(branch_age)
+    branch_age.to_i <= options[:exclude_days].to_i
+  end
+end
+
+GitMergedBranches.run
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