#!/bin/bash
#
# Copyright 2017 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.
#
# execution_phase_tests.sh: miscellaneous integration tests of Bazel for
# behaviors that affect the execution phase.
#

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

source "$(rlocation "io_bazel/src/test/shell/integration_test_setup.sh")" \
  || { echo "integration_test_setup.sh not found!" >&2; exit 1; }

case "$(uname -s | tr [:upper:] [:lower:])" in
msys*|mingw*|cygwin*)
  declare -r is_windows=true
  ;;
*)
  declare -r is_windows=false
  ;;
esac

if "$is_windows"; then
  export MSYS_NO_PATHCONV=1
  export MSYS2_ARG_CONV_EXCL="*"
fi

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

if ! type try_with_timeout >&/dev/null; then
  # Bazel's testenv.sh defines try_with_timeout but the Google-internal version
  # uses a different testenv.sh.
  function try_with_timeout() { $* ; }
fi

function set_up() {
  cd ${WORKSPACE_DIR}
  mkdir -p "foo"
  cat > foo/foocc.py <<'EOF'
import sys

if __name__ == "__main__":
  assert len(sys.argv) >= 1
  output = open(sys.argv[1], "wt")
  for path in sys.argv[2:]:
    input = open(path, "rt")
    output.write(input.read())
EOF

  cat > foo/foo.bzl <<'EOF'
FooFiles = provider(fields = ["transitive_sources"])
def get_transitive_srcs(srcs, deps):
  return depset(
        srcs,
        transitive = [dep[FooFiles].transitive_sources for dep in deps])

def _foo_library_impl(ctx):
  trans_srcs = get_transitive_srcs(ctx.files.srcs, ctx.attr.deps)
  return [FooFiles(transitive_sources=trans_srcs)]

foo_library = rule(
    implementation = _foo_library_impl,
    attrs = {
        "srcs": attr.label_list(allow_files=True),
        "deps": attr.label_list(),
    },
)
def _foo_binary_impl(ctx):
  foocc = ctx.executable._foocc
  out = ctx.outputs.out
  trans_srcs = get_transitive_srcs(ctx.files.srcs, ctx.attr.deps)
  srcs_list = trans_srcs.to_list()
  ctx.actions.run(executable = foocc,
                  arguments = [out.path] + [src.path for src in srcs_list],
                  inputs = srcs_list,
                  tools = [foocc],
                  outputs = [out])

foo_binary = rule(
    implementation = _foo_binary_impl,
    attrs = {
        "srcs": attr.label_list(allow_files=True),
        "deps": attr.label_list(),
        "_foocc": attr.label(default=Label("//foo:foocc"),
                             allow_files=True, executable=True, cfg="host")
    },
    outputs = {"out": "%{name}.out"},
)
EOF

}

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

function test_experimental_nested_set_as_skykey_threshold_successfully_builds() {
  export DONT_SANITY_CHECK_SERIALIZATION=1

  cat > foo/BUILD <<EOF
load(":foo.bzl", "foo_library", "foo_binary")
py_binary(
    name = "foocc",
    srcs = ["foocc.py"],
)

foo_library(
    name = "a",
    srcs = ["1.a"],
)

foo_library(
    name = "b",
    srcs = ["1.b"],
    deps = [":a"],
)
foo_binary(
    name = "c",
    srcs = ["c.foo"],
    deps = [":b"],
)
EOF
  touch foo/1.a foo/1.b foo/c.foo

  bazel build //foo:c || fail "build failed"
  regular=$(bazel dump --skyframe summary)
  bazel clean

  bazel build --experimental_nested_set_as_skykey_threshold=1 //foo:c || fail "build failed"
  with_flag=$(bazel dump --skyframe summary)

  [[ regular != $with_flag ]] || fail "number of nodes and edges on skyframe should be different"
}

function test_experimental_nested_set_as_skykey_threshold_changes() {
  export DONT_SANITY_CHECK_SERIALIZATION=1
  cat > foo/BUILD <<EOF
load(":foo.bzl", "foo_library", "foo_binary")
py_binary(
    name = "foocc",
    srcs = ["foocc.py"],
)

foo_library(
    name = "a",
    srcs = ["1.a"],
)

foo_library(
    name = "b",
    srcs = ["1.b"],
    deps = [":a"],
)
foo_binary(
    name = "c",
    srcs = ["c.foo"],
    deps = [":b"],
)
EOF
  touch foo/1.a foo/1.b foo/c.foo

  bazel build //foo:c || fail "build failed"
  regular=$(bazel dump --skyframe summary)

  bazel build --experimental_nested_set_as_skykey_threshold=1 //foo:c || fail "build failed"
  with_flag=$(bazel dump --skyframe summary)

  [[ $regular != $with_flag ]] || fail "number of nodes and edges on skyframe should be different"

  bazel build --experimental_nested_set_as_skykey_threshold=0 //foo:c || fail "build failed"
  back_to_zero=$(bazel dump --skyframe summary)

  [[ $regular == $back_to_zero ]] || fail "number of nodes and edges on skyframe should be the same"
}

function test_experimental_nested_set_as_skykey_dirty_file() {
  export DONT_SANITY_CHECK_SERIALIZATION=1
  cat > foo/BUILD <<EOF
load(":foo.bzl", "foo_library", "foo_binary")
py_binary(
    name = "foocc",
    srcs = ["foocc.py"],
)

foo_library(
    name = "a",
    srcs = ["1.a"],
)

foo_library(
    name = "b",
    srcs = ["1.b"],
    deps = [":a"],
)
foo_binary(
    name = "c",
    srcs = ["c.foo"],
    deps = [":b"],
)
EOF
  touch foo/1.a foo/1.b foo/c.foo

  bazel build --experimental_nested_set_as_skykey_threshold=2 //foo:c || fail "build failed"
  # Deliberately breaking the file.
  echo omgomgomg >> foo/foocc.py
  bazel build --experimental_nested_set_as_skykey_threshold=2 //foo:c && fail "Expected failure"

  true  # reset the last exit code so the test won't be considered failed
}


run_suite "Integration tests of ${PRODUCT_NAME} with NestedSet as SkyKey."