#!/usr/bin/env bash
#
# Run Gradle tasks against an explicitly-named project and report the result from
# the exit code, never from the console text.
#
# Why this exists: reading "BUILD SUCCESSFUL" out of piped Gradle output is not a
# reliable signal. A shell chain like `cd dir && cp f . ` followed on the next
# line by `./gradlew test` will happily run Gradle in whatever directory the
# shell was already in if the cd failed, and the success line it prints is then
# about a different project entirely. That failure mode is silent and reads
# exactly like success.
#
# Usage:
#   gradle-verify <project-dir> <gradle-task...> [-- <extra gradle args>]
#
# Exits with Gradle's own exit code. Prints a summary block that names the
# absolute project directory actually used.

set -euo pipefail

die() { printf '%s: %s\n' "$(basename "$0")" "$*" >&2; exit 2; }

[ $# -ge 2 ] || die "usage: $(basename "$0") <project-dir> <gradle-task...> [-- <gradle args>]"

raw_dir=$1; shift

# Resolve to an absolute path up front and fail loudly if it is not what we
# expect. Every later step uses this resolved value, so there is nothing for an
# ambient cwd to influence.
project_dir=$(cd "$raw_dir" 2>/dev/null && pwd) \
  || die "project dir does not exist or is not readable: $raw_dir"
[ -x "$project_dir/gradlew" ] \
  || die "no executable gradlew in: $project_dir"

tasks=()
extra=()
seen_sep=0
for arg in "$@"; do
  if [ "$arg" = "--" ]; then seen_sep=1; continue; fi
  if [ $seen_sep -eq 1 ]; then extra+=("$arg"); else tasks+=("$arg"); fi
done
[ ${#tasks[@]} -ge 1 ] || die "no gradle tasks given"

printf '=== gradle-verify ===\n'
printf 'project : %s\n' "$project_dir"
printf 'tasks   : %s\n' "${tasks[*]}"
[ ${#extra[@]} -gt 0 ] && printf 'args    : %s\n' "${extra[*]}"

# -p pins the project directory regardless of cwd. Note gradlew is invoked by
# absolute path too, so we are not depending on PATH or on cwd for the wrapper
# either.
set +e
"$project_dir/gradlew" -p "$project_dir" "${tasks[@]}" ${extra[@]+"${extra[@]}"}
status=$?
set -e

printf 'exit    : %d\n' "$status"
if [ $status -eq 0 ]; then
  printf 'result  : PASS\n'
else
  printf 'result  : FAIL\n'
fi
exit $status