BUILD.bazel

"""
# Usage overview
Building the extractor can be done with bazel. If building from the internal repository, it is recommended to use
`tools/bazel` from there.

A specific kotlin extractor variant can be built with
```
bazel build @codeql//java/kotlin-extractor:codeql-extractor-kotlin-<variant>-<version>
```
where `<variant>` is either `standalone` or `embeddable`, and `<version>` is one of the supported versions.
```
bazel build @codeql//java/kotlin-extractor
```
will build a default variant:
* standalone, unless `CODEQL_KOTLIN_SINGLE_VERSION_EMBEDDABLE` is set to true, in which case it will go for embeddable
* the version will be taken as the last supported version less than the version of the currently available `kotlinc`,
  or `CODEQL_KOTLIN_SINGLE_VERSION` if set.

If building from the `codeql` repository, `@codeql` can be skipped.

It is recommended to use the `kotlinc` wrapper in `dev` (which is also available in `tools` from `semmle-code`), which
takes care about providing a sensible default version and keep the version of the default target up to date.

If the wrapper is not used and `kotlinc` is updated, bazel won't be aware of it and will therefore keep the same default
version. Possible workarounds for that:
* switch to using the `kotlinc` wrapper in `dev` as mentioned above
* `bazel clean`
* `bazel fetch --force @codeql//java/kotlin-extractor`
* `bazel fetch --force @codeql_kotlin_defaults//:all` (only from `codeql`)
"""

# This file is used in the `@codeql_kotlin_embeddable` external repo, which means we need to
# reference explicitly @codeql
load(
    "@codeql//java/kotlin-extractor:versions.bzl",
    "VERSIONS",
    "get_compatilibity_sources",
    "get_language_version",
    "version_less",
)
load("@rules_kotlin//kotlin:core.bzl", "kt_javac_options", "kt_kotlinc_options")
load("@rules_kotlin//kotlin:jvm.bzl", "kt_jvm_library")
load("@rules_python//python:defs.bzl", "py_binary")

package(default_visibility = ["//java/kotlin-extractor:__subpackages__"])

_for_embeddable = repo_name().endswith("codeql_kotlin_embeddable")

_common_extractor_name_prefix = "codeql-extractor-kotlin"

_extractor_name_prefix = "%s-%s" % (
    _common_extractor_name_prefix,
    "embeddable" if _for_embeddable else "standalone",
)

py_binary(
    name = "generate_dbscheme",
    srcs = ["generate_dbscheme.py"],
)

_resources = [
    (
        r,
        r[len("src/main/resources/"):],
    )
    for r in glob(["src/main/resources/**"])
]

kt_javac_options(
    name = "javac-options",
    release = "8",
)

[
    (
        kt_kotlinc_options(
            name = "kotlinc-options-%s" % v,
            include_stdlibs = "none",
            jvm_target = "1.8",
            language_version = get_language_version(v),
            warn = "error",
            x_optin = [
                "kotlin.RequiresOptIn",
                "org.jetbrains.kotlin.ir.symbols.%s" %
                ("IrSymbolInternals" if version_less(v, "2.0.0") else "UnsafeDuringIrConstructionAPI"),
            ],
            x_suppress_version_warnings = True,
        ),
        # * extractor.name is different for each version, so we need to put it in different output dirs
        # * in order to put it in `resources`, we need to define `resource_strip_prefix` to strip this version
        # * `resource_strip_prefix` is unique per jar, so we must also put other resources under the same version prefix
        genrule(
            name = "resources-%s" % v,
            srcs = [src for src, _ in _resources],
            outs = [
                "%s/com/github/codeql/extractor.name" % v,
            ] + [
                "%s/%s" % (v, target)
                for _, target in _resources
            ],
            cmd = "\n".join([
                "echo %s-%s > $(RULEDIR)/%s/com/github/codeql/extractor.name" % (_extractor_name_prefix, v, v),
            ] + [
                "cp $(execpath %s) $(RULEDIR)/%s/%s" % (source, v, target)
                for source, target in _resources
            ]),
        ),
        kt_jvm_library(
            name = "%s-%s" % (_extractor_name_prefix, v),
            srcs =
                ["@codeql//java/kotlin-extractor:generated-dbscheme"] +
                glob(
                    [
                        "src/**/*.kt",
                        "src/**/*.java",
                    ],
                    exclude = [
                        # a specific version is included back by `get_compatibility_sources`
                        "src/main/kotlin/utils/versions/**",
                        # this appears if `generated_dbscheme.py` is run manually, while we want the one built by bazel
                        "src/main/kotlin/KotlinExtractorDbScheme.kt",
                    ],
                ) + get_compatilibity_sources(v, "src/main/kotlin/utils/versions"),
            javac_opts = ":javac-options",
            kotlinc_opts = ":kotlinc-options-%s" % v,
            module_name = "codeql-kotlin-extractor",
            # resource_strip_prefix is very nit-picky: the following makes it work from
            # `codeql`, `@codeql_kotlin_embeddable` and `semmle-code`
            resource_strip_prefix = (
                ("../%s/" % repo_name() if repo_name() else "") +
                ("%s/" % package_name() if package_name() else "") +
                v
            ),
            resources = [
                ":resources-%s" % v,
            ],
            visibility = ["//visibility:public"],
            deps = [
                "@kotlin-compiler%s-%s" % (
                    "-embeddable" if _for_embeddable else "",
                    v,
                ),
                "@kotlin-stdlib-%s" % v,
            ],
        ),
        # if in main repository, alias the embeddable versions from the modified @codeql_kotlin_embeddable repo
        alias(
            name = "%s-embeddable-%s" % (_common_extractor_name_prefix, v),
            actual = "@codeql_kotlin_embeddable//:%s-embeddable-%s" % (_common_extractor_name_prefix, v),
            visibility = ["//visibility:public"],
        ) if not _for_embeddable else None,
    )
    for v in VERSIONS
]

(
    genrule(
        name = "generated-dbscheme",
        srcs = ["@codeql//java:dbscheme"],
        outs = ["KotlinExtractorDbScheme.kt"],
        cmd = "$(execpath :generate_dbscheme) $< $@",
        tools = [":generate_dbscheme"],
        visibility = ["@codeql_kotlin_embeddable//:__pkg__"],
    ),
    [
        alias(
            name = n,
            actual = "//java/kotlin-extractor/defaults:%s" % n,
            visibility = ["//visibility:public"],
        )
        for n in (
            "%s-standalone" % _common_extractor_name_prefix,
            "%s-embeddable" % _common_extractor_name_prefix,
            _common_extractor_name_prefix,
        )
    ],
    alias(
        name = "kotlin-extractor",
        actual = _common_extractor_name_prefix,
        visibility = ["//visibility:public"],
    ),
    filegroup(
        name = "many",
        srcs = ["%s-%s-%s" % (
            _common_extractor_name_prefix,
            variant,
            version,
        ) for variant in ("standalone", "embeddable") for version in VERSIONS],
        visibility = ["//visibility:public"],
    ),
    genrule(
        name = "versions-list",
        outs = ["kotlin-versions.list"],
        cmd = "\n".join(["cat > $@ << EOF"] + VERSIONS + ["EOF"]),
    ),
    # these are packed in the extractor pack for running QL tests
    filegroup(
        name = "version-picker",
        srcs = [
            "pick-kotlin-version.py",
            ":versions-list",
        ],
        visibility = ["//visibility:public"],
    ),
) if not _for_embeddable else None