#!/usr/bin/env bash

# file      : brep/handler/ci/ci-dir.in
# copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
# license   : MIT; see accompanying LICENSE file

# Simple package CI request handler with directory storage.
#
# Keep the CI request directory unless simulating. Write the CI result
# manifest to stdout.
#
usage="usage: $0 <dir>"

verbose= #true

trap "{ exit 1; }" ERR
set -o errtrace # Trap ERR in functions.

@import brep/handler/handler@
@import brep/handler/ci/ci@

if [ "$#" != 1 ]; then
  error "$usage"
fi

# CI request data directory (last and the only argument).
#
data_dir="${!#/}"

if [ -z "$data_dir" ]; then
  error "$usage"
fi

if [ ! -d "$data_dir" ]; then
  error "'$data_dir' does not exist or is not a directory"
fi

reference="$(basename "$data_dir")"

# Parse the CI request manifest and obtain the repository URL, package names
# with optional versions, as well as the simulate value.
#
manifest_parser_start "$data_dir/request.manifest"

repository=
packages=()
simulate=

while IFS=: read -ru "$manifest_parser_ofd" -d '' n v; do
  case "$n" in
    repository) repository="$v"  ;;
    package)    packages+=("$v") ;;
    simulate)   simulate="$v"    ;;
  esac
done

manifest_parser_finish

if [ -z "$repository" ]; then
  error "repository manifest value expected"
fi

if [ -n "$simulate" -a "$simulate" != "success" ]; then
  exit_with_manifest 400 "unrecognized simulation outcome '$simulate'"
fi

# Produce the bpkg-build(1)-like package spec for tracing.
#
spec=
for p in "${packages[@]}"; do
  if [ -n "$spec" ]; then
    spec="$spec,"
  fi
  spec="$spec$p"
done

if [ -n "$spec" ]; then
  spec="$spec@"
fi

spec="$spec$repository"

if [ -n "$simulate" ]; then
  rm -r "$data_dir"
  trace "CI request for '$spec' is simulated"
else
  trace "CI request for '$spec' is queued"
fi

# The spec normally contains the full commit id and so feels too hairy for
# including in the message.
#
exit_with_manifest 200 "CI request is queued"