git-getb

#!/bin/bash

# Copyright (c) 2019-2020 Benjamin Holt -- MIT License

if [ "$1" == "-h" -o "$1" == "--help" ]; then
    cat <<USAGE
usage: git getb [B] [ALIAS]    Checks out branch B as ALIAS; B defaults to
                           ALLGIT_BRANCH, ALIAS defults to initials from the
                           last segment of B
       git getb -h|--help      Print this message and exit
USAGE
    exit 0
fi

# Bold=`tput bold`
# Off=`tput sgr0`

Branch="$1"  # If both branch and alias are specified, use them
Alias="$2"
if [ "$#" -lt 2 ]; then  # If zero or one are specified...
    Branch="${ALLGIT_BRANCH:-$1}"  # ...try to get branch from allgit, or assume it was given
    if [ "$ALLGIT_BRANCH" ]; then  # If the branch came from allgit, any argument must be the alias
        Alias="$1"
    fi
fi

if [ -z "$Branch" ]; then
    echo "Must specify a branch directly or with allgit" >&2
    exit 1
fi

ConfigRemote=`git config bettergit.defaultremote`
: ${DefaultRemote:=${ConfigRemote:-"origin"}}

FoundBranch=`git branch --list --all "$DefaultRemote/$Branch"`
if [ -z "$FoundBranch" ]; then
    echo "$DefaultRemote/$Branch: branch not found" >&2
    exit 1
fi

if [ -z "$Alias" ]; then
    # Alias=`echo "$Branch" | sed -e 's:.*/::'`  # Derrive default alias from last segment of branch name
    Alias=`echo "$Branch"  | sed -e 's:.*/::g' -e 's/[A-Z]*-*[0-9][0-9]*//' | tr -d 'a-z0-9_.-' | tr 'A-Z' 'a-z'`  # Derive default alias from CamelCaseInitials (ignoring any JIRA-123- prefix)
    if [ -z "$Alias" ]; then
      Alias=`echo "$Branch" | sed -e 's:.*/::g' -e 's/[A-Z]*-*[0-9][0-9]*//' -e 's/^\([A-Za-z]\)[^_.-]*/\1/' -e 's/[_.-]\([A-Za-z]\)[^_.-]*/\1/g'`  # Derive default alias from dash-separated-initials (again ignoring JIRA-123-)
    fi
fi

git checkout -b "$Alias" --track "$DefaultRemote/$Branch"

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