Add the script to generate stats

scripts/README

@@ -0,0 +1,14 @@
+In this directory, the scripts used by the release team for the blog post are
+stored.
+
+== stats-beta.sh ==
+
+Generate the diff between to beta versions.
+
+For example:
+scripts/stats-beta.sh ~/dev/mozilla/beta-src FIREFOX_32_0b1_RELEASE FIREFOX_32_0b2_RELEASE > _posts/$(date +"%Y-%m-%d")-fx-32-b1-to-b2.md
+
+Will generate the diff between beta 1 and beta 2 of Firefox 32.
+
+
+

scripts/stats-beta.sh

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+#!/bin/bash
+# This script generates stats between two tags of Firefox
+# It will generate an HTML result.
+
+if test $# -ne 3; then
+    echo "Wrong syntax. Expecting:"
+    echo "$0 <directory> <previous revision> <current>"
+    exit 1
+fi
+
+DIRECTORY=$1
+PREV=$2
+CURRENT=$3
+
+if test ! -d $DIRECTORY; then
+    echo "Cannot find/access $DIRECTORY"
+    exit 1
+fi
+if test ! -d $DIRECTORY/.hg; then
+    echo "Cannot find/access $DIRECTORY/.hg. Not a mercurial repository?"
+    exit 1
+fi
+
+cd $DIRECTORY
+
+REVISION="ancestor($PREV,$CURRENT)::$CURRENT  - ancestor($PREV,$CURRENT)"
+
+STATS=$(hg diff --stat --rev "$REVISION"|tail -1)
+
+# Parse "112 files changed, 2174 insertions(+), 423 deletions(-)"
+FILES_CHANGED=$(echo $STATS|sed -e "s|\([0-9]*\) files changed.*|\1|g")
+INSERT=$(echo $STATS|sed -e "s|.* \([0-9]*\) insertions.*|\1|g")
+DELETE=$(echo $STATS|sed -e "s|.* \([0-9]*\) deletions(-)|\1|g")
+
+LIST=$(hg log --rev "$REVISION" --template '<tr><td><strong>{author}</strong></td><td>{desc|strip|firstline} - <a href="https://hg.mozilla.org/releases/mozilla-beta/rev/{node|short}">{node|short}</a></td></tr>\n'|grep -v "<strong>ffxbld")
+
+# get the list of languages used
+LANGUAGES=$(hg diff --rev "$REVISION"|grep +++|sed -e "s|.*\.\(.*\)$|\1|g"|grep -v ^+++|sort |uniq -c|sort -n -r)
+# get the list of modules touched
+MODULES=$(hg diff --rev "$REVISION"|grep +++|sed -e "s|+++ b/\([[:alnum:]]*\)/.*|\1|g"|grep -v ^+++|uniq -c|sort -r -n)
+
+NB_CHANGESET=$(echo "$LIST"|wc -l)
+
+# Generate the metadata for the blog post
+MAJOR_VERSION=$(echo $PREV|sed -e "s|FIREFOX_\(.*\)_.*_.*|\1|g")
+PREV_BETA_VERSION=$(echo $PREV|sed -e "s|FIREFOX_.*_0b\(.*\)_.*|\1|g")
+CURRENT_BETA_VERSION=$(echo $CURRENT|sed -e "s|FIREFOX_.*_0b\(.*\)_.*|\1|g")
+CURRENT_DATE=$(date +"%Y-%m-%d %H:%M:%S")
+
+echo "---
+layout: post
+title:  \"Firefox $MAJOR_VERSION beta$PREV_BETA_VERSION to beta$CURRENT_BETA_VERSION\"
+date:   $CURRENT_DATE
+categories: statistics $MAJOR_VERSION
+---
+"
+
+echo "<p>"
+echo "<ul>"
+echo "<li>"$NB_CHANGESET" changesets</li>"
+echo "<li>"$FILES_CHANGED" files changed</li>"
+echo "<li>"$INSERT" insertions</li>"
+echo "<li>"$DELETE" deletions</li>"
+echo "</ul>"
+echo "</p>"
+echo "<p>"
+echo "<table><tr><td><strong>Extension</strong></td><td><strong>Occurrences</strong></td></tr>"
+echo "$LANGUAGES"|awk '{print "<tr><td>"$2"</td><td>"$1"</td></tr>"}'
+echo "</table>"
+echo "</p>"
+echo "<p>"
+echo "<table><tr><td><strong>Module</strong></td><td><strong>Occurrences</strong></td></tr>"
+echo "$MODULES"|awk '{print "<tr><td>"$2"</td><td>"$1"</td></tr>"}'
+echo "</table>"
+echo "</p>"
+echo "<p>List of changesets:"
+
+echo "<table>"
+# Strip the email address
+echo "$LIST"|sed -e "s|<strong>\(.*\) <.*></strong>|<strong>\1</strong>|g" -e "s|Bug \([0-9]*\)|<a href=\"http://bugzilla.mozilla.org/\1\">Bug \1</a>|gi"
+echo "</table>"
+echo "</p>"