#!/bin/bash
#
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Tests the examples provided in Bazel with MSVC toolchain
#

set -euo pipefail
# --- begin runfiles.bash initialization ---
if [[ ! -d "${RUNFILES_DIR:-/dev/null}" && ! -f "${RUNFILES_MANIFEST_FILE:-/dev/null}" ]]; then
    if [[ -f "$0.runfiles_manifest" ]]; then
      export RUNFILES_MANIFEST_FILE="$0.runfiles_manifest"
    elif [[ -f "$0.runfiles/MANIFEST" ]]; then
      export RUNFILES_MANIFEST_FILE="$0.runfiles/MANIFEST"
    elif [[ -f "$0.runfiles/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
      export RUNFILES_DIR="$0.runfiles"
    fi
fi
if [[ -f "${RUNFILES_DIR:-/dev/null}/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
  source "${RUNFILES_DIR}/bazel_tools/tools/bash/runfiles/runfiles.bash"
elif [[ -f "${RUNFILES_MANIFEST_FILE:-/dev/null}" ]]; then
  source "$(grep -m1 "^bazel_tools/tools/bash/runfiles/runfiles.bash " \
            "$RUNFILES_MANIFEST_FILE" | cut -d ' ' -f 2-)"
else
  echo >&2 "ERROR: cannot find @bazel_tools//tools/bash/runfiles:runfiles.bash"
  exit 1
fi
# --- end runfiles.bash initialization ---

# Load the test setup defined in the parent directory
source $(rlocation io_bazel/src/test/shell/integration_test_setup.sh) \
  || { echo "integration_test_setup.sh not found!" >&2; exit 1; }

# `uname` returns the current platform, e.g "MSYS_NT-10.0" or "Linux".
# `tr` converts all upper case letters to lower case.
# `case` matches the result if the `uname | tr` expression to string prefixes
# that use the same wildcards as names do in Bash, i.e. "msys*" matches strings
# starting with "msys", and "*" matches everything (it's the default case).
case "$(uname -s | tr [:upper:] [:lower:])" in
msys*)
  # As of 2019-01-15, Bazel on Windows only supports MSYS Bash.
  declare -r is_windows=true
  ;;
*)
  declare -r is_windows=false
  ;;
esac

if "$is_windows"; then
  # Disable MSYS path conversion that converts path-looking command arguments to
  # Windows paths (even if they arguments are not in fact paths).
  export MSYS_NO_PATHCONV=1
  export MSYS2_ARG_CONV_EXCL="*"
fi

if ! "$is_windows"; then
  echo "This test suite requires running on Windows. But now is ${PLATFORM}" >&2
  exit 0
fi

function set_up() {
  copy_examples
  setup_bazelrc
  export MSYS_NO_PATHCONV=1
  export MSYS2_ARG_CONV_EXCL="*"
}

# An assertion that execute a binary from a sub directory (to test runfiles)
function assert_binary_run_from_subdir() {
    ( # Needed to make execution from a different path work.
    export PATH=${bazel_javabase}/bin:"$PATH" &&
    mkdir -p x &&
    cd x &&
    unset JAVA_RUNFILES &&
    unset TEST_SRCDIR &&
    unset RUNFILES_MANIFEST_FILE &&
    unset RUNFILES_MANIFEST_ONLY &&
    unset RUNFILES_DIR &&
    assert_binary_run "../$1" "$2" )
}

#
# Native rules
#
function test_cpp() {
  local cpp_pkg=examples/cpp
  assert_build_output \
    ./bazel-bin/${cpp_pkg}/hello-lib.lib ${cpp_pkg}:hello-world
  assert_build_output ./bazel-bin/${cpp_pkg}/hello-world.pdb \
    ${cpp_pkg}:hello-world --output_groups=pdb_file
  assert_build_output ./bazel-bin/${cpp_pkg}/hello-world.pdb -c dbg \
    ${cpp_pkg}:hello-world --output_groups=pdb_file
  assert_build -c opt ${cpp_pkg}:hello-world --output_groups=pdb_file
  test -f ./bazel-bin/${cpp_pkg}/hello-world.pdb \
    && fail "PDB file should not be generated in OPT mode"
  assert_build ${cpp_pkg}:hello-world
  ./bazel-bin/${cpp_pkg}/hello-world foo >& $TEST_log \
    || fail "./bazel-bin/${cpp_pkg}/hello-world foo execution failed"
  expect_log "Hello foo"
  assert_test_ok "//examples/cpp:hello-success_test"
  assert_test_fails "//examples/cpp:hello-fail_test"
}

function test_cpp_with_msys_gcc() {
  local cpp_pkg=examples/cpp
  assert_build_output \
    ./bazel-bin/${cpp_pkg}/libhello-lib.a ${cpp_pkg}:hello-world \
    --compiler=msys-gcc
  assert_build_output \
    ./bazel-bin/${cpp_pkg}/libhello-lib_922c518841.so ${cpp_pkg}:hello-lib\
    --compiler=msys-gcc --output_groups=dynamic_library
  assert_build ${cpp_pkg}:hello-world --compiler=msys-gcc
  ./bazel-bin/${cpp_pkg}/hello-world foo >& $TEST_log \
    || fail "./bazel-bin/${cpp_pkg}/hello-world foo execution failed"
  expect_log "Hello foo"
  assert_test_ok "//examples/cpp:hello-success_test" --compiler=msys-gcc
  assert_test_fails "//examples/cpp:hello-fail_test" --compiler=msys-gcc
}

function test_cpp_with_mingw_gcc() {
  local cpp_pkg=examples/cpp
  ( # /mingw64/bin should be in PATH because during runtime the built binary
    # depends on some dynamic libraries in this directory.
  export PATH="/mingw64/bin:$PATH"
  assert_build_output \
    ./bazel-bin/${cpp_pkg}/libhello-lib.a ${cpp_pkg}:hello-world \
    --compiler=mingw-gcc --experimental_strict_action_env
  assert_build_output \
    ./bazel-bin/${cpp_pkg}/libhello-lib_922c518841.so ${cpp_pkg}:hello-lib\
    --compiler=mingw-gcc --output_groups=dynamic_library \
    --experimental_strict_action_env
  assert_build ${cpp_pkg}:hello-world --compiler=mingw-gcc \
    --experimental_strict_action_env
  ./bazel-bin/${cpp_pkg}/hello-world foo >& $TEST_log \
    || fail "./bazel-bin/${cpp_pkg}/hello-world foo execution failed"
  expect_log "Hello foo"
  assert_test_ok "//examples/cpp:hello-success_test" --compiler=mingw-gcc \
    --experimental_strict_action_env --test_env=PATH
  assert_test_fails "//examples/cpp:hello-fail_test" --compiler=mingw-gcc \
    --experimental_strict_action_env --test_env=PATH)
}

function test_cpp_alwayslink() {
  mkdir -p cpp/main
  cat >cpp/main/BUILD <<EOF
cc_library(
    name = "lib",
    srcs = ["lib.cc"],
    alwayslink = 1,
)
cc_library(
    name = "main",
    srcs = ["main.cc"],
)
cc_binary(
    name = "bin",
    deps = [":main", ":lib"],
)
EOF

  cat >cpp/main/lib.cc <<EOF
extern int global_variable;
int init() {
    ++global_variable;
    return global_variable;
}
int x = init();
int y = init();
EOF

  cat >cpp/main/main.cc <<EOF
#include<stdio.h>
int global_variable = 0;
int main(void) {
    printf("global : %d\n", global_variable);
    return 0;
}
EOF
  assert_build //cpp/main:bin
  ./bazel-bin/cpp/main/bin >& $TEST_log \
    || fail "//cpp/main:bin execution failed"
  expect_log "global : 2"
}

function test_java() {
  local java_pkg=examples/java-native/src/main/java/com/example/myproject

  assert_build_output ./bazel-bin/${java_pkg}/libhello-lib.jar ${java_pkg}:hello-lib
  assert_build_output ./bazel-bin/${java_pkg}/libcustom-greeting.jar ${java_pkg}:custom-greeting
  assert_build_output ./bazel-bin/${java_pkg}/hello-world ${java_pkg}:hello-world
  assert_build_output ./bazel-bin/${java_pkg}/hello-resources ${java_pkg}:hello-resources
  assert_binary_run_from_subdir "bazel-bin/${java_pkg}/hello-world foo" "Hello foo"
}

function create_tmp_drive() {
  mkdir "$TEST_TMPDIR/tmp_drive"

  TMP_DRIVE_PATH=$(cygpath -w "$TEST_TMPDIR\\tmp_drive")
  for X in {A..Z}
  do
    TMP_DRIVE=${X}
    subst ${TMP_DRIVE}: ${TMP_DRIVE_PATH} >NUL || TMP_DRIVE=""
    if [ -n "${TMP_DRIVE}" ]; then
      break
    fi
  done

  if [ -z "${TMP_DRIVE}" ]; then
    fail "Cannot create temporary drive."
  fi

  export TMP_DRIVE
}

function delete_tmp_drive() {
  if [ -n "${TMP_DRIVE}" ]; then
    subst ${TMP_DRIVE}: /D
  fi
}

function test_java_with_jar_under_different_drive() {
  create_tmp_drive

  trap delete_tmp_drive EXIT

  local java_pkg=examples/java-native/src/main/java/com/example/myproject
  bazel --output_user_root=${TMP_DRIVE}:/tmp build ${java_pkg}:hello-world

  assert_binary_run_from_subdir "bazel-bin/${java_pkg}/hello-world --classpath_limit=0" "Hello world"
}

function test_java_test() {
  setup_javatest_support
  local java_native_tests=//examples/java-native/src/test/java/com/example/myproject
  local java_native_main=//examples/java-native/src/main/java/com/example/myproject

  assert_build "-- //examples/java-native/... -${java_native_main}:hello-error-prone"
  assert_build_fails "${java_native_main}:hello-error-prone" \
      "Did you mean 'result = b == -1;'?"
  assert_test_ok "${java_native_tests}:hello"
  assert_test_ok "${java_native_tests}:custom"
  assert_test_fails "${java_native_tests}:fail"
  assert_test_fails "${java_native_tests}:resource-fail"
}

function test_native_python() {
  # On windows, we build a python executable zip as the python binary
  assert_build //examples/py_native:bin
  # run the python package directly
  ./bazel-bin/examples/py_native/bin >& $TEST_log \
    || fail "//examples/py_native:bin execution failed"
  expect_log "Fib(5) == 8"
  # Using python <zipfile> to run the python package
  python ./bazel-bin/examples/py_native/bin.zip >& $TEST_log \
    || fail "//examples/py_native:bin execution failed"
  expect_log "Fib(5) == 8"
  assert_test_ok //examples/py_native:test
  assert_test_fails //examples/py_native:fail
}

# If this test fails on your Windows machine, ensure that you have a python3.exe
# in your PATH. Depending on how you installed Python, this might not exist by
# default on your system. See this pull request for an example:
# https://github.com/bazelbuild/continuous-integration/pull/1216
function test_native_python_with_runfiles() {
  BUILD_FLAGS="--enable_runfiles --build_python_zip=0"
  bazel build -s --verbose_failures $BUILD_FLAGS //examples/py_native:bin \
    || fail "Failed to build //examples/py_native:bin with runfiles support"
  (
    # Clear runfiles related envs
    unset RUNFILES_MANIFEST_FILE
    unset RUNFILES_MANIFEST_ONLY
    unset RUNFILES_DIR
    # Run the python package directly
    ./bazel-bin/examples/py_native/bin >& $TEST_log \
      || fail "//examples/py_native:bin execution failed"
    expect_log "Fib(5) == 8"
    # Use python <python file> to run the python package
    python ./bazel-bin/examples/py_native/bin >& $TEST_log \
      || fail "//examples/py_native:bin execution failed"
    expect_log "Fib(5) == 8"
  )
  bazel test --test_output=errors $BUILD_FLAGS //examples/py_native:test >> $TEST_log 2>&1 \
    || fail "Test //examples/py_native:test failed while expecting success"
  bazel test --test_output=errors $BUILD_FLAGS //examples/py_native:fail >> $TEST_log 2>&1 \
    && fail "Test //examples/py_native:fail succeed while expecting failure" \
    || true
}

function test_native_python_with_python3() {
  PYTHON3_PATH=${PYTHON3_PATH:-/c/Program Files/Anaconda3}
  if [ ! -x "${PYTHON3_PATH}/python.exe" ]; then
    warn "Python3 binary not found under $PYTHON3_PATH, please set PYTHON3_PATH correctly"
  else
    # Shutdown bazel to ensure python path get updated.
    export BAZEL_PYTHON="${PYTHON3_PATH}/python.exe"
    export PATH="${PYTHON3_PATH}:$PATH"
    test_native_python
  fi
}

function test_python_test_with_data() {
  touch BUILD

  mkdir data
  cat >data/BUILD <<EOF
filegroup(
  name = "test_data",
  srcs = ["data.txt"],
  visibility = ["//visibility:public"],
)
EOF

  cat >data/data.txt <<EOF
hello world
EOF

  mkdir src
  cat >src/BUILD <<EOF
py_test(
  name = "data_test",
  srcs = ["data_test.py"],
  data = ["//data:test_data"],
)
EOF

  cat >src/data_test.py <<EOF
import unittest
import os

class MyTest(unittest.TestCase):

  def test_data(self):
    with open("data/data.txt") as f:
      line = f.readline().strip()
      self.assertEqual(line, "hello world")

if __name__ == '__main__':
  print("CWD = " + os.getcwd())
  unittest.main()
EOF

  bazel test --test_output=errors //src:data_test >& $TEST_log \
    || fail "Test //src:test failed while expecting success"
}

run_suite "examples on Windows"