Formatting GUIDs with sed

At my current client, I'm often given GUIDs for one reason or another.  Often they are not in the format that I need them to be.  Sometimes they have the dashes and I need them to be dash-free.  Other times, the dashes have been removed and I need them back.

Here's some quick, down and dirty sed commands to swap them back and forth:

To remove the dashes:

$ echo 8EC60070-685F-41DB-C881-EACF9E74E4BD | sed 's/-//g'
8EC60070685F41DBC881EACF9E74E4BD
$

To put them back:

$ echo 8EC60070685F41DBC881EACF9E74E4BD | sed -rn 's/([0-9A-F]{8})([0-9A-F]{4})([0-9A-F]{4})([0-9A-F]{4})([0-9A-F]{12})/\1-\2-\3-\4-\5/p')
8EC60070-685F-41DB-C881-EACF9E74E4BD
$

It goes without saying you can embed this very sed command in a bash script and run it over many rows in a file.

Bash script for pulling/fetching multiple git clones

In my current assignment, I'm acting as the main build guy for a number of projects that use git for source control.  As such, I find it very useful to keep all my git clones up to date whether I'm actively developing in them or not.  Additionally, I need to review the changes other developers are committing, so I'd like to get a summary of recent git activities.

Over time, I've put this little bash script together to help me with that.  I've included the script in this posting so I can remember later what/why I did this.  Disclaimer, I wrote this script and run this script in bash on Linux (not via git-bash in Windows).  Also, I'm using Zenity for some nice UI look/feel.

  1 #!/bin/bash

  2

  3 pushd ~/dev/repos > /dev/null

  4

  5 # The log file

  6 PULL_LOG="$(mktemp)"

  7

  8 # Get a list of all the clones in this directory.

  9 CLONES=$(find -maxdepth 2 -mindepth 2 -type d -name ".git" | sed -e 's|\./||' -e 's|/\.git||')

 10

 11 # Get a list of all the branches in clone/branch format

 12 ALL_BRANCHES=$(for clone in $CLONES; do cd $clone; for branch in $(git branch -l | sed 's/\s\|\*//g'); do echo $clone/$branch; done; cd ..; done)

 13

 14 # Count the branches

 15 BRANCH_COUNT=$(echo $ALL_BRANCHES | sed 's/ /\n/g' | wc -l)

 16

 17 # Start the log file

 18 echo "Pull log for $(date)" >> $PULL_LOG

 19 echo "--------------------------------------------------------------------------------" >> $PULL_LOG

 20

 21 # Function for pipping output to zenity progress dialog

 22 function pull_clones() {

 23     clone_counter=0

 24     for clone in $CLONES; do

 25         echo "Pulling branches for clone $clone" >> $PULL_LOG

 26         echo "--------------------------------------------------------------------------------" >> $PULL_LOG

 27         cd $clone

 28         echo "# Fetching changes for clone $clone"

 29         git fetch origin 2>> $PULL_LOG

 30         for branch in $(git branch -l | sed 's/\s\|\*//g'); do

 31             echo "# Merging branch $clone/$branch"

 32             echo "Merging branch $branch" >> $PULL_LOG

 33             git checkout $branch 2> /dev/null

 34             git merge origin/$branch >> $PULL_LOG

 35             echo | awk '{print count / total * 100}' count=$clone_counter total=$BRANCH_COUNT

 36             let clone_counter=clone_counter+1

 37         done

 38         cd ..

 39         echo >> $PULL_LOG

 40     done

 41 }

 42

 43 # Do it

 44 pull_clones | zenity --progress --title='Pulling development clones' --width=512

 45 zenity --text-info --filename=$PULL_LOG --title="Pull log" --width=500 --height=450

 46

 47 #Clean up

 48 rm $PULL_LOG

 49

 50 popd > /dev/null