Script to delete all disabled branches of a Bamboo build plan.

bamboo_delete_disabled_branches.sh

#!/bin/bash -u
# Deletes all disabled branches of a Bamboo build plan
# -----------------------------------------------------------------------------
# Syntax: 
#   $0 {planKey}
# -----------------------------------------------------------------------------
# Purpose: Bamboo does not automatically delete plan branches when the 
#   corresponding branch in the repository gets deleted. Because Bamboo fails 
#   to pull from it, it disables the branch but keep it around forever.
#   This script goes through all branches of a build plan and delete the ones
#   that are disabled.
#
#   Notes:
#      - Script depends on jq library: https://github.com/stedolan/jq
#      - The script will prompt for Bamboo credentials. The corresponding
#        account must have admin access to the given plan.
#      - Before running the script, change the value of `BAMBOO_BASE_URL` to 
#        the correct url of the bamboo instance.
# -----------------------------------------------------------------------------
# Copyright 2014 Lixar I.T. Inc.
# Author: Sylvain Guillopé <[email protected]>
# -----------------------------------------------------------------------------

LC_COLLATE=C ; export LC_COLLATE
LANG=C ; export LANG
umask 022

function die {
    [ -z "$1" ] || echo 1>&2 "[!] $1"
    exit 1
}

[ -z "$1" ] && die "Usage: ./$(basename $0) {planKey}"

readonly PLAN_KEY="$1"
readonly MAX_BRANCH_RESULT="500"
readonly BAMBOO_BASE_URL="https://mybamboo.net"
readonly BAMBOO_GET_PLAN_URL="$BAMBOO_BASE_URL/rest/api/latest/plan/$PLAN_KEY?os_authType=basic&expand=branches&max-results=$MAX_BRANCH_RESULT"
readonly BAMBOO_DELETE_PLAN_URL="$BAMBOO_BASE_URL/ajax/deleteChain.action"

# Ask for bamboo credentials
username=
password=
while [ -z "$username" ]; do
    read -p "Bamboo username: " -s username
done
while [ -z "$password" ]; do
    read -p "Bamboo password: " -s password
done


function fetch_plan {
    echo $(curl -k --silent --user "$username:$password" --header "Accept: application/json" --header "X-Atlassian-Token: no-check" "$BAMBOO_GET_PLAN_URL")
}

function get_branch_lines {
    echo "$1" | jq --compact-output '.branches.branch[]'
}

function delete_disabled_branches {
    while read -r branch_line; do
        if is_branch_disabled "$branch_line"; then
            local branch_key=$(get_branch_key "$branch_line")
            delete_branch "$branch_key"
        fi
    done <<< "$branch_lines"
}

function is_branch_disabled {
    local enabled=$(echo $1 | jq '.enabled')
    if [ "$enabled" == "false" ]; then
        return 0
    else
        return 1
    fi
}

function delete_branch {
    local branch_key=$1
    echo "delete branch ${branch_key}"
    curl -k -qs --user "$username:$password" --header "X-Atlassian-Token: no-check" -H 'Accept: application/json' -H 'Content-Type: application/x-www-form-urlencoded' --data "buildKey=$branch_key" "$BAMBOO_DELETE_PLAN_URL"
}

function get_branch_key {
    echo $1 | jq --raw-output '.key'
}

function main {
    local plan_details=$(fetch_plan "$1")
    local branch_lines=$(get_branch_lines "$plan_details")
    delete_disabled_branches "$branch_lines"
}

main "$PLAN_KEY"

Worked a charm on bamboo 6.5.0. Many thanks!