BUILD.bazel

# Copied from https://github.com/bazelbuild/bazel-central-registry/tree/main/modules/zlib/1.3.1.bcr.4/patches
# Adapted from https://github.com/protocolbuffers/protobuf/blob/master/third_party/zlib.BUILD

#  Copyright 2008 Google Inc.  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions are
#  met:
#
#      * Redistributions of source code must retain the above copyright
#  notice, this list of conditions and the following disclaimer.
#      * Redistributions in binary form must reproduce the above
#  copyright notice, this list of conditions and the following disclaimer
#  in the documentation and/or other materials provided with the
#  distribution.
#      * Neither the name of Google Inc. nor the names of its
#  contributors may be used to endorse or promote products derived from
#  this software without specific prior written permission.
#
#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
#  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#  Code generated by the Protocol Buffer compiler is owned by the owner
#  of the input file used when generating it.  This code is not
#  standalone and requires a support library to be linked with it.  This
#  support library is itself covered by the above license.

load("@rules_cc//cc:defs.bzl", "cc_library")
load("@rules_license//rules:license.bzl", "license")

package(
    default_applicable_licenses = [":license"],
)

license(
    name = "license",
    license_kinds = ["@rules_license//licenses/spdx:Zlib"],
    license_text = "LICENSE",
)

exports_files([
    "LICENSE",
])

_ZLIB_HEADERS = [
    "crc32.h",
    "deflate.h",
    "gzguts.h",
    "inffast.h",
    "inffixed.h",
    "inflate.h",
    "inftrees.h",
    "trees.h",
    "zconf.h",
    "zlib.h",
    "zutil.h",
]

_ZLIB_PREFIXED_HEADERS = ["zlib/include/" + hdr for hdr in _ZLIB_HEADERS]

# In order to limit the damage from the `includes` propagation
# via `:zlib`, copy the public headers to a subdirectory and
# expose those.
genrule(
    name = "copy_public_headers",
    srcs = _ZLIB_HEADERS,
    outs = _ZLIB_PREFIXED_HEADERS,
    cmd_bash = "cp $(SRCS) $(@D)/zlib/include/",
    cmd_bat = " && ".join(
        ["@copy /Y \"$(location %s)\" \"$(@D)\\zlib\\include\\\"  >NUL" %
         s for s in _ZLIB_HEADERS],
    ),
)

config_setting(
    name = "mingw_gcc_compiler",
    flag_values = {
        "@bazel_tools//tools/cpp:compiler": "mingw-gcc",
    },
    visibility = [":__subpackages__"],
)

cc_library(
    name = "z",
    srcs = [
        "adler32.c",
        "compress.c",
        "crc32.c",
        "deflate.c",
        "gzclose.c",
        "gzlib.c",
        "gzread.c",
        "gzwrite.c",
        "infback.c",
        "inffast.c",
        "inflate.c",
        "inftrees.c",
        "trees.c",
        "uncompr.c",
        "zutil.c",
        # Include the un-prefixed headers in srcs to work
        # around the fact that zlib isn't consistent in its
        # choice of <> or "" delimiter when including itself.
    ] + _ZLIB_HEADERS,
    hdrs = _ZLIB_PREFIXED_HEADERS,
    copts = select({
        ":mingw_gcc_compiler": [
            "-fpermissive",
        ],
        "@platforms//os:windows": [],
        "//conditions:default": [
            "-Wno-deprecated-non-prototype",
            "-Wno-unused-variable",
            "-Wno-implicit-function-declaration",
        ],
    }),
    includes = ["zlib/include/"],
    visibility = ["//visibility:public"],
)

alias(
    name = "zlib",
    actual = ":z",
    visibility = ["//visibility:public"],
)