From 3d5ace1fb4417b8080cb79698726c308044bbe25 Mon Sep 17 00:00:00 2001
From: Ivan Alejandro <ivanalejandro0@gmail.com>
Date: Sat, 5 Apr 2014 15:37:00 -0300
Subject: Support stats between tags.

Also:
- Show tags that are being compared for each repo
- Add License
- Add explanation for the script
- Add sample output
---
 pkg/scripts/stats.sh | 75 ++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 67 insertions(+), 8 deletions(-)

diff --git a/pkg/scripts/stats.sh b/pkg/scripts/stats.sh
index 2b7a8b18..8ea41267 100755
--- a/pkg/scripts/stats.sh
+++ b/pkg/scripts/stats.sh
@@ -1,4 +1,55 @@
 #!/bin/bash
+######################################################################
+# boostrap_develop.sh
+# Copyright (C) 2013 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+######################################################################
+
+# Script that gives a summary of changes between two annotated tags.
+# Automatically detects the last annotated tag and the previous on.
+# This is useful to give information during a release.
+
+# Example output:
+# Changes summary between closest annotated tag to current annotated tag
+# ======================================================================
+#
+# ----------------------------------------------------------------------
+# Stats for: bitmask_client - 0.3.8..0.5.0
+# Stats: 65 files changed, 4384 insertions(+), 1384 deletions(-)
+# Merges: 580
+# ----------------------------------------------------------------------
+# Stats for: leap_pycommon - 0.3.6..0.3.7
+# Stats: 9 files changed, 277 insertions(+), 18 deletions(-)
+# Merges: 41
+# ----------------------------------------------------------------------
+# Stats for: soledad - 0.4.4..0.4.5
+# Stats: 61 files changed, 5361 insertions(+), 1377 deletions(-)
+# Merges: 258
+# ----------------------------------------------------------------------
+# Stats for: keymanager - 0.3.7..0.3.8
+# Stats: 9 files changed, 118 insertions(+), 67 deletions(-)
+# Merges: 83
+# ----------------------------------------------------------------------
+# Stats for: leap_mail - 0.3.8..0.3.9
+# Stats: 43 files changed, 9487 insertions(+), 2159 deletions(-)
+# Merges: 419
+# ----------------------------------------------------------------------
+#
+# TOTAL
+# Stats: 187 files changed, 19627 insertions(+), 5005 deletions(-)
+# Merges: 1381
 
 REPOSITORIES="bitmask_client leap_pycommon soledad keymanager leap_mail"
 
@@ -7,24 +58,32 @@ INSERTIONS=0
 DELETIONS=0
 MERGES_TOTAL=0
 
-echo "Changes summary between closest annotated tag to HEAD"
-echo "====================================================="
+echo "Changes summary between closest annotated tag to current annotated tag"
+echo "======================================================================"
 echo
+echo "----------------------------------------------------------------------"
 
 for repo in $REPOSITORIES; do
     cd $repo
-    echo "Stats for: $repo"
-    # the 'describe' command gives the closest annotated tag
-    STATS=$(git diff --shortstat `git describe --abbrev=0`..HEAD)
-    MERGES=$(git log --merges `git describe --abbrev=0`..HEAD | wc -l)
+
+    LAST_TWO_TAGS=(`git for-each-ref refs/tags --sort=-taggerdate --format='%(refname)' --count=2 | cut -d/ -f3`)
+    CURRENT=${LAST_TWO_TAGS[0]}
+    PREV=${LAST_TWO_TAGS[1]}
+
+    echo "Stats for: $repo - $PREV..$CURRENT"
+    STATS=$(git diff --shortstat $PREV..$CURRENT)
+    MERGES=$(git log --merges $PREV..$CURRENT | wc -l)
     echo "Stats:$STATS"
     echo "Merges: $MERGES"
-    VALUES=(`echo $STATS | awk '{ print $1, $4, $6 }'`)  # use array to store values
+    echo "----------------------------------------------------------------------"
+
+    # Sum all the results for the grand total
+    VALUES=(`echo $STATS | awk '{ print $1, $4, $6 }'`)  # use array to store/split values
     CHANGED=$(echo $CHANGED + ${VALUES[0]} | bc)
     INSERTIONS=$(echo $INSERTIONS + ${VALUES[1]} | bc)
     DELETIONS=$(echo $DELETIONS + ${VALUES[2]} | bc)
     MERGES_TOTAL=$(echo $MERGES_TOTAL + $MERGES | bc)
-    echo "----------------------------------------------------------------------"
+
     cd ..
 done
 
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