Merge branch 'master' into 2018-05-11-fork-libdm

1 files changed, 90 insertions, 0 deletions

diff --git a/scripts/code-stats.rb b/scripts/code-stats.rb
new file mode 100755
index 000000000..d73343be9
--- /dev/null
+++ b/scripts/code-stats.rb
@@ -0,0 +1,90 @@
+#! /usr/bin/env ruby
+
+require 'date'
+require 'pp'
+require 'set'
+
+REGEX = /(\w+)\s+'(.+)'\s+(.*)/
+
+Commit = Struct.new(:hash, :time, :author, :stats)
+CommitStats = Struct.new(:files, :nr_added, :nr_deleted)
+
+def calc_stats(diff)
+        changed = Set.new
+        added = 0
+        deleted = 0
+        
+        diff.lines.each do |l|
+        	case l.encode('UTF-8', 'binary', invalid: :replace, undef: :replace, replace: '')
+                when /^\+\+\+ (\S+)/
+                        changed << $1
+                when /^\+/
+                        added = added + 1
+                when /^---/
+                        # do nothing
+                when /^\-/
+                        deleted = deleted + 1
+        	end
+	end
+
+	CommitStats.new(changed, added, deleted)
+end
+
+def select_commits(&block)
+        commits = []
+        
+	input = `git log --format="%h '%aI' %an"`
+	input.lines.each do |l|
+		m = REGEX.match(l)
+
+		raise "couldn't parse: ${l}" unless m
+
+		hash = m[1]
+		time = DateTime.iso8601(m[2])
+		author = m[3]
+
+		if block.call(hash, time, author)
+        		diff = `git log -1 -p #{hash} | filterdiff -X configure`
+        		commits << Commit.new(hash, time, author, calc_stats(diff))
+		end
+	end
+	
+	commits
+end
+
+def since(date)
+        lambda do |hash, time, author|
+        	time >= date
+        end
+end
+
+def pad(str, col)
+        str + (' ' * (col - str.size))
+end
+
+def code_delta(s)
+        s.nr_added + s.nr_deleted
+end
+
+def cmp_stats(lhs, rhs)
+        code_delta(rhs) <=> code_delta(lhs)
+end
+
+#-----------------------------------
+
+commits = select_commits(&since(DateTime.now - 14))
+
+authors = Hash.new {|hash, key| hash[key] = CommitStats.new(Set.new, 0, 0)}
+
+commits.each do |c|
+	author_stats = authors[c.author]
+	author_stats.files.merge(c.stats.files)
+	author_stats.nr_added = author_stats.nr_added + c.stats.nr_added
+	author_stats.nr_deleted = author_stats.nr_deleted + c.stats.nr_deleted
+end
+
+puts "#{pad("Author", 20)}\tChanged files\tInsertions\tDeletions"
+authors.keys.sort {|a1, a2| cmp_stats(authors[a1], authors[a2])}.each do |k|
+	v = authors[k]
+	puts "#{pad(k, 20)}\t#{v.files.size}\t\t#{v.nr_added}\t\t#{v.nr_deleted}"
+end