Shows Git branches only for the current sprint, if detected, and allows for a grep parameter for filtering results.

git_branch_enhanced

#!/bin/bash

#
# A more intelligent branch listing.
# 
# [ Sprint Detection ]
# If a current sprint is detected, only corresponding branches
# will be listed. The pattern is "sprint/X/" where X could be any string.
# 
# [ Automatic Pattern Matching ]
# If an argument is passed, the final result will be grep'd.
# 

echo

# Get the current branch
cb=$(git rev-parse --abbrev-ref HEAD)

if [ -z "$cb" ]; then
    echo "It appears you're not in a Git repository."
    exit 1
fi

# The trigger string we look to match on
trigger="sprint/"
triggerLen=$((${#trigger}))

# Check if the current branch looks like a sprint
if [[ "$cb" != *"sprint/"* ]]; then
    
    # Do a normal, full branch listing (maybe with grep, if present)
    if [ -z "$1" ]; then
        git branch
    else
        git branch | grep "$1"
    fi
    
fi

# Get the index of the trigger
idx=$(expr index "$cb" 1$trigger)

# Find the starting point for substring extraction
offset=$((idx + triggerLen))

# Trim unused prefix of current branch, before sprint trigger
#sprint="${cb:offset}" # Not ZSH compatible
sprint="$(echo $cb | cut -c$offset-)"

# Find the slash that comes after the current sprint name
edx=$(expr index "$sprint" C/)
edx=$((edx - 1))

# Trim the unused suffix of the current branch, after the sprint name
#sprint="${sprint:0:edx}" # Not ZSH compatible
sprint="$(echo $sprint | cut -c1-$edx)"

echo "Listing branches for sprint \"$sprint\":"
echo

if [ -z "$1" ]; then
    git branch | grep "$sprint"
else
    git branch | grep "$sprint" | grep "$1"
fi