git_list.sh

#!/bin/bash

# Check argument
if [ $# -lt 2 ]; then
  >&2 echo "Usage: $0 <directory to scan> <output>"
  exit 1
fi

# Output file
if [ ! -f $2 ]; then
  #create a new empty file
  touch $2
else
  #delete content of the file, keep only the header
  header=$(head -1 $2)
  echo $header > $2
fi

input=$1
output=$2

# Process:
# Print all the directory that has `.git` in it
count=0
echo -ne ' Preparing...\r'
gitdirs=$(find $input/ -name ".git") #the slash / at the end of input is important
n=$(echo ${gitdirs} | wc -w)
for i in ${gitdirs}; do
  count=$((${count}+1))
  progress=$((100*${count}/n))
  echo -ne ' Running...('${progress}'%)\r'
  PATH=`echo $i | /bin/sed 's,/.git$,,g'`

  # update git local database
  pushd $PATH > /dev/null 2>&1 && 
  /usr/bin/git fetch -tq > /dev/null 2>&1
  popd > /dev/null 2>&1 &&

  URL=`/bin/grep "url" $i/config | /usr/bin/awk '{print $3}'`
  HEADS=$(for j in `/bin/ls $i/refs/heads/`; \
    do echo $j:$(/bin/cat $i/refs/heads/$j); \
    done)
  LATEST_TAGS=$(for j in `/bin/ls $i/refs/tags/ | /usr/bin/sort -r | /usr/bin/head -1`; \
    do echo $j:$(/bin/cat $i/refs/tags/$j); \
    done)

  # Get the date of latest commit in local
  pushd $PATH > /dev/null 2>&1 && 
  LOCAL_DATE=$(/usr/bin/git log -1 --date=short --pretty=format:%ad)
  LATEST_DATE=$(/usr/bin/git log -1 origin/master --date=short --pretty=format:%ad)
  popd > /dev/null 2>&1 &&

  #echo $PATH,$URL,$HEADS,$LATEST_TAGS;
  echo $PATH,$URL,$LOCAL_DATE,$LATEST_DATE >> ${output}
done