#!/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.
#
# Integration tests for "bazel run"

# Load test environment
source $(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/testenv.sh \
  || { echo "testenv.sh not found!" >&2; exit 1; }

create_and_cd_client
NO_SIGNAL_OVERRIDE=1 put_bazel_on_path

write_default_bazelrc
add_to_bazelrc "build --embed_changelist=none"
add_to_bazelrc "test --notest_loasd"

#### HELPER FUNCTIONS ##################################################

function write_py_files() {
  mkdir -p py || fail "mkdir py failed"

  echo "py_binary(name = 'binary', srcs = ['binary.py'])" > py/BUILD
  echo "py_test(name = 'test', srcs = ['test.py'])" >> py/BUILD

  echo "print 'Hello, Python World!'" >py/py.py
  chmod +x py/py.py

  ln -sf py.py py/binary.py
  ln -sf py.py py/test.py
}

function write_cc_source_files() {
  mkdir -p cc
  cat > cc/kitty.cc <<EOF
#include <stdio.h>

int main(void) {
  FILE* f;
  char buf[256];

  f = fopen("cc/hello_kitty.txt", "r");
  if (f == NULL) {
    f = fopen("cc/pussycat.txt", "r");
  }
  if (f == NULL) {
    return 1;
  }

  fgets(buf, 255, f);
  fclose(f);
  printf("%s", buf);
  return 0;
}
EOF

  cat > cc/BUILD <<EOF
cc_binary(name='kitty',
          srcs=['kitty.cc'],
          data=glob(['*.txt']))
EOF
}

#### TESTS #############################################################

function test_run_py_binary() {
  write_py_files
  bazel run //py:binary >& $TEST_log || fail "Expected success"
  expect_log_once 'Hello, Python World'
}

function test_run_py_test() {
  write_py_files
  bazel run //py:test >& $TEST_log || fail "Expected success"
  expect_log_once 'Hello, Python World'
}

function test_runfiles_present_cc_binary() {
  # cc_binary is needed because runfiles are always created for Python
  # and shell binaries, so --nobuild_runfile_links does not apply to them.
  # (see RuleConfiguredTarget.shouldCreateRunfilesSymlinks())
  write_cc_source_files

  cat > cc/hello_kitty.txt <<EOF
Hello, kitty.
EOF

  bazel run --nobuild_runfile_links //cc:kitty > output || fail "Bazel run failed."
  assert_contains "Hello, kitty" output || fail "Output is not OK."

  bazel run --nobuild_runfile_links //cc:kitty > output2 || fail "Second Bazel run failed."
  assert_contains "Hello, kitty" output2 || fail "Output is not OK."
}

function test_runfiles_updated_correctly_with_nobuild_runfile_links {
  write_cc_source_files

  cat > cc/hello_kitty.txt <<EOF
Hello, kitty.
EOF

  bazel run --nobuild_runfile_links //cc:kitty > output || fail "Bazel run failed."
  assert_contains "Hello, kitty" output || fail "Output is not OK."

  rm cc/hello_kitty.txt
  cat > cc/pussycat.txt <<EOF
A pussycat.
EOF

  bazel run --nobuild_runfile_links //cc:kitty > output || fail "Bazel run failed."
  assert_contains "pussycat" output || fail "Output is not OK."
}

function test_script_file_generation {
  mkdir -p fubar || fail "mkdir fubar failed"
  echo 'sh_binary(name = "fubar", srcs = ["fubar.sh"])' > fubar/BUILD
  echo 'for t in "$@"; do echo "arg: $t"; done' > fubar/fubar.sh
  chmod +x fubar/fubar.sh

  bazel run --script_path=$(pwd)/fubar/output.sh //fubar \
     || fail "Bazel run failed (--script_path)."
  grep "fubar \"\$\@\"" ./fubar/output.sh \
     || fail "Bazel run --script_path output was incorrect."

  $(pwd)/fubar/output.sh a "b c" d > ./fubar/fubar.output \
     || fail "Generated script exited with an error."
  grep "arg: b c" ./fubar/fubar.output \
     || fail "Generated script did not handle arguments correctly."
}

function test_consistent_command_line_encoding {
  # todo(aehlig): reenable: https://github.com/bazelbuild/bazel/issues/1775
  return 0

  # TODO(bazel-team): fix bazel to have consistent encoding, also on darwin;
  # see https://github.com/bazelbuild/bazel/issues/1766
  [ "$PLATFORM" != "darwin" ] || warn "test disabled on darwin, see Github issue 1766"
  [ "$PLATFORM" != "darwin" ] || return 0

  # äöüÄÖÜß in UTF8
  local arg=$(echo -e '\xC3\xA4\xC3\xB6\xC3\xBC\xC3\x84\xC3\x96\xC3\x9C\xC3\x9F')

  mkdir -p foo || fail "mkdir foo failed"
  echo 'sh_binary(name = "foo", srcs = ["foo.sh"])' > foo/BUILD
  echo 'sh_test(name = "foo_test", srcs = ["foo.sh"])' >> foo/BUILD
  echo 'test "$1" = "'"$arg"'"' > foo/foo.sh
  chmod +x foo/foo.sh

  bazel run //foo -- "$arg" > output \
    || fail "Bazel run failed."

  bazel test //foo:foo_test --test_arg="$arg" \
    || fail "Bazel test failed"

  bazel --batch run //foo -- "$arg" > output \
    || fail "Bazel run failed (--batch)."
  bazel --batch test //foo:foo_test --test_arg="$arg" \
    || fail "Bazel test failed (--batch)"
}

function test_interrupt_kills_child() {
  mkdir -p foo || fail "mkdir foo failed"
  rm -f /tmp/sleep-minute-pipe
  mkfifo /tmp/sleep-minute-pipe || fail "make pipe failed"
  echo 'sh_binary(name = "sleep-minute", srcs = ["sleep-minute.sh"])' > foo/BUILD
  echo -e "#!/bin/bash\n"'echo $$ >/tmp/sleep-minute-pipe'"\n"'sleep 60' > foo/sleep-minute.sh
  chmod +x foo/sleep-minute.sh
  # Note that if bazel info is not executed before the actual bazel run, this script would have to
  # be run in "monitor mode" (with the command set -m) for bazel or the server to receive SIGINT.
  local serverpid=$(bazel info server_pid)
  if [ -z $serverpid ]; then
    fail "Couldn't get Bazel server PID"
  fi
  (bazel run //foo:sleep-minute || true) &
  local sleeppid
  read sleeppid </tmp/sleep-minute-pipe
  if [ -z $sleeppid ]; then
    fail "Bazel run did not invoke shell script"
  fi
  kill -SIGINT $serverpid

  # This test is a bit flaky, so we wait a bit more when the process still runs
  # after 0.25s.
  for i in 0.25 0.5 1 2; do
    sleep $i
    kill -0 $sleeppid 2> /dev/null || return 0
  done
  fail "Shell script still running after SIGINT sent to server"
}

# Tests bazel run with --color=no on a failed build does not produce color.
function test_no_color_on_failed_run() {
  mkdir -p x || fail "mkdir failed"
  echo "cc_binary(name = 'x', srcs = ['x.cc'])" > x/BUILD
  cat > x/x.cc <<EOF
int main(int, char**) {
  // Missing semicolon
  return 0
}
EOF

  bazel run //x:x &>$TEST_log --color=no && fail "expected failure"
  cat $TEST_log
  # Verify that the failure is a build failure.
  expect_log "expected ';'"
  # Hack to make up for grep -P not being supported.
  grep $(echo -e '\x1b') $TEST_log && fail "Expected colorless output"
  true
}


function test_no_ansi_stripping_in_stdout_or_stderr() {
  mkdir -p x || fail "mkdir failed"
  echo "cc_binary(name = 'x', srcs = ['x.cc'])" > x/BUILD
  cat > x/x.cc <<EOF
#include <unistd.h>
int main(int, char**) {
  const char out[] = {'<', 0x1B, '[', 'a', ',', 0x1B, '[', '1', '>', 0x0A};
  const char err[] = {'<', 0x1B, '[', 'b', ',', 0x1B, '[', '2', '>', 0x0A};
  write(1, out, 10);
  write(2, err, 10);
  return 0;
}
EOF
  out1color=$(mktemp x/XXXXXX)
  out1nocolor=$(mktemp x/XXXXXX)
  out2=$(mktemp x/XXXXXX)
  err1raw_color=$(mktemp x/XXXXXX)
  err1raw_nocolor=$(mktemp x/XXXXXX)
  err1color=$(mktemp x/XXXXXX)
  err1nocolor=$(mktemp x/XXXXXX)
  err2=$(mktemp x/XXXXXX)

  bazel run //x:x --color=yes >$out1color 2>$err1raw_color || fail "expected success"
  bazel run //x:x --color=no >$out1nocolor 2>$err1raw_nocolor || fail "expected success"

  ${PRODUCT_NAME}-bin/x/x >$out2 2>$err2

  # Extract the binary's stderr from the raw stderr, which also contains bazel's
  # stderr; if present, remove a trailing ^[[0m (reset terminal to defaults).
  bazel_stderr_line_count_color=$(cat $err1raw_color \
    | grep -n "Running command line: .*/x/x" \
    | awk -F ':' '{print $1}')
  start=$(($bazel_stderr_line_count_color+1))
  tail -n +$start $err1raw_color | sed -e 's/.\[0m$//' >$err1color

  bazel_stderr_line_count_nocolor=$(cat $err1raw_nocolor \
    | grep -n "Running command line: .*/x/x" \
    | awk -F ':' '{print $1}')
  start=$(($bazel_stderr_line_count_nocolor+1))
  tail -n +$start $err1raw_nocolor >$err1nocolor

  diff $out1color $out2 >&/dev/null || fail "stdout with --color=yes differs"
  diff $out1nocolor $out2 >&/dev/null || fail "stdout with --color=no differs"
  diff $err1color $err2 >&/dev/null || fail "stderr with --color=yes differs"
  diff $err1nocolor $err2 >&/dev/null || fail "stderr with --color=no differs"

  rm -rf x
}

# Test for $(location) in args list of sh_binary
function test_location_in_args() {
  mkdir -p some/testing
  cat > some/testing/BUILD <<'EOF'
genrule(
    name = "generated",
    cmd = "echo 2 > $@",
    outs = ["generated.txt"],
)

sh_binary(
    name = "testing",
    srcs = ["test.sh"],
    data = ["data", ":generated"],
    args = ["$(location :data)", "$(location :generated)"],
)
EOF

  cat > some/testing/test.sh <<'EOF'
#!/bin/bash
set -ex
echo "Got $@"
i=1
for arg in $@; do
  [[ $((i++)) = $(cat $arg) ]]
done
EOF
  chmod +x some/testing/test.sh

  echo "1" >some/testing/data

  # Arguments are only provided through bazel run, we cannot test it
  # with bazel-bin/some/testing/testing
  bazel run //some/testing >$TEST_log || fail "Expected success"
  expect_log "Got .*some/testing/data.*some/testing/generated.txt"
}

function test_run_for_alias() {
  mkdir -p a
  cat > a/BUILD <<EOF
sh_binary(name='a', srcs=['a.sh'])
alias(name='b', actual='a')
EOF

  cat > a/a.sh <<EOF
#!/bin/bash
echo "Dancing with wolves"
exit 0
EOF

  chmod +x a/a.sh
  bazel run //a:b >"$TEST_log" || fail "Expected success"
  expect_log "Dancing with wolves"
}

run_suite "'bazel run' integration tests"