From 16f928c7715eefd3e2610b7ffd69e201128c306b Mon Sep 17 00:00:00 2001
From: Esteban MIno <efmino@uc.cl>
Date: Thu, 8 Nov 2018 13:54:08 -0300
Subject: [PATCH] add comments

---
 auto-changelog.sh | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/auto-changelog.sh b/auto-changelog.sh
index 157290750..722207880 100755
--- a/auto-changelog.sh
+++ b/auto-changelog.sh
@@ -1,14 +1,22 @@
 #! /bin/bash
+# update tags
 git fetch --tags
-URL="https://github.com/MetaMask/metamask-extension/pull/"
-LOG=$(git log $(git describe --tags $(git rev-list --tags --max-count=1))..HEAD --pretty="%s::%b"  --reverse --grep="Merge pull request #" --grep="(#");
+# get origin
+ORIGIN=$(git config --get remote.origin.url)
+URL=$(echo $ORIGIN | sed -E 's/(.*).git{1}(.*)/\1/')
+# get git logs from last tag until HEAD, pretty by 'subject::body' filteres by grep for PR made with Github squash merge or Github regular merge
+LOG=$(git log $(git describe --tags $(git rev-list --tags --max-count=1))..HEAD --pretty="%s::%b" --reverse --grep="Merge pull request #" --grep="(#");
 while read -r line; do
-    SUBJECT="$(echo $line | sed -E  's/(.*):{2}(.*)/\1/')"
+    # get git log subject
+    SUBJECT="$(echo $line | sed -E 's/(.*):{2}(.*)/\1/')"
+    # get git log PR id, PR made with Github squash merge or Github regular merge
     PR=$(echo $SUBJECT | sed 's/^.*(#\([^&]*\)).*/\1/' | sed 's/^.*#\([^&]*\) from.*/\1/')
-    if [ -z "$(echo $line | sed -E  's/(.*):{2}(.*)/\2/')" ]; then
-        MESSAGE=$(echo $SUBJECT | sed "s/(#$PR)//g"); else
-        MESSAGE=$(echo $line | sed -E  's/(.*):{2}(.*)/\2/') 
+    # if PR made with Github squah merge, subject is the body
+    if [ -z "$(echo $line | sed -E 's/(.*):{2}(.*)/\2/')" ]; then
+        BODY=$(echo $SUBJECT | sed "s/(#$PR)//g"); else
+        BODY=$(echo $line | sed -E 's/(.*):{2}(.*)/\2/') 
     fi
-    sed -i "/## Current Develop Branch/a - [#$PR]($URL$PR): $MESSAGE" CHANGELOG.md;
+    # add entry to CHANGELOG
+    sed -i "/## Current Develop Branch/a - [#$PR]($URL/pull/$PR): $BODY" CHANGELOG.md;
 done <<< "$LOG"
 echo "CHANGELOG updated"