Gradle Wrapper search script

gw

#!/bin/bash

# PURPOSE
#
# The Gradle wrapper[1] is a simple and convenient way of making Gradle
# builds self-contained and reproducible. However, in multi-project
# builds, it can be cumbersome to type in relative paths e.g.:
#   ./gradlew   # when in root
#   ../gradlew  # when in subdir
#
# This script finds any Gradle wrapper (gradlew) executable in the
# current directory or any directory above it.
#
#
# DEBUGGING
#
# To observe the search for gradlew and to ensure which one is
# ultimately used, invoke the script with Bash's "-x" option. Below you
# can see the directory traversal at work, finally selecting the
# 'gradlew' script one directory up from where 'gradle' was invoked.
#
#     $ cd /src/my-proj/submod
#     $ bash -x $(which gw) --version
#     + GRADLEW=/src/my-proj/submod/gradlew
#     + GRADLEW=/src/my-proj/gradlew
#     + /src/my-proj/gradlew --version
#     ...
#
#
# [1] http://gradle.org/docs/current/userguide/gradle_wrapper.html


CWD=$PWD
until [ $CWD == / ]; do
    GRADLEW=$CWD/gradlew
    if [ -e $GRADLEW ]; then
        exec $GRADLEW $@
    fi
    CWD=$(dirname $CWD)
done

echo No Gradle wrapper found
exit 1