motiejus/hermetic_cc_toolchain
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toolchain wrapper: zig_exe path is relative

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Just like we know the path to zig_lib_dir, we do know the path to
zig_exe. Lets use that.

This was surfaced by experimenting with
`--experimental_use_hermetic_linux_sandbox`.
`repository_ctx.path("zig")` would return the real file system path to
zig (outside of the sandbox), which is not good when the sandbox is
hermetic.

Co-developed-by: Fabian Hahn <fabian@hahn.graphics>
This commit is contained in:
Motiejus Jakštys 2022-12-11 14:59:29 +00:00 committed by Motiejus Jakštys
parent 43b6e1c0c1
commit 1fb93e089c
1 changed files with 13 additions and 7 deletions
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20
toolchain/defs.bzl
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@ -92,21 +92,25 @@ _ZIG_TOOLS = [
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN = """@echo off
if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
set ZIG_LIB_DIR=%~dp0\\..\\..\\lib
set ZIG_EXE=%~dp0\\..\\..\\zig.exe
goto :set_zig_lib_dir
:have_external_zig_sdk_lib
set ZIG_LIB_DIR=external\\zig_sdk\\lib
set ZIG_EXE=external\\zig_sdk\\zig.exe
:set_zig_lib_dir
set ZIG_LOCAL_CACHE_DIR={cache_prefix}\\bazel-zig-cc
set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
"{zig}" "{zig_tool}" {maybe_target} %*
"%ZIG_EXE%" "{zig_tool}" {maybe_target} %*
"""
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS = """@echo off
if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
set ZIG_LIB_DIR=%~dp0\\..\\..\\lib
set ZIG_EXE=%~dp0\\..\\..\\zig.exe
goto :set_zig_lib_dir
:have_external_zig_sdk_lib
set ZIG_LIB_DIR=external\\zig_sdk\\lib
set ZIG_EXE=external\\zig_sdk\\zig.exe
:set_zig_lib_dir
if exist "%TMP%\\*" goto :usertmp
set ZIG_LOCAL_CACHE_DIR=C:\\Temp\\bazel-zig-cc
@ -115,29 +119,33 @@ goto zig
set ZIG_LOCAL_CACHE_DIR=%TMP%\\bazel-zig-cc
:zig
set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
"{zig}" "{zig_tool}" {maybe_target} %*
"%ZIG_EXE%" "{zig_tool}" {maybe_target} %*
"""
_ZIG_TOOL_WRAPPER_CACHE_KNOWN = """#!/bin/sh
set -e
if [ -d external/zig_sdk/lib ]; then
ZIG_LIB_DIR=external/zig_sdk/lib
ZIG_EXE=external/zig_sdk/zig
else
ZIG_LIB_DIR="$(dirname "$0")/../../lib"
ZIG_EXE="$(dirname "$0")/../../zig"
fi
export ZIG_LIB_DIR
export ZIG_LOCAL_CACHE_DIR="{cache_prefix}/bazel-zig-cc"
export ZIG_GLOBAL_CACHE_DIR="{cache_prefix}/bazel-zig-cc"
{maybe_gohack}
exec "{zig}" "{zig_tool}" {maybe_target} "$@"
exec "$ZIG_EXE" "{zig_tool}" {maybe_target} "$@"
"""
_ZIG_TOOL_WRAPPER_CACHE_GUESS = """#!/bin/sh
set -e
if [ -d external/zig_sdk/lib ]; then
ZIG_LIB_DIR=external/zig_sdk/lib
ZIG_EXE=external/zig_sdk/zig
else
ZIG_LIB_DIR="$(dirname "$0")/../../lib"
ZIG_EXE="$(dirname "$0")/../../zig"
fi
if [ -n "$TMPDIR" ]; then
_cache_prefix=$TMPDIR
@ -154,7 +162,7 @@ export ZIG_LIB_DIR
export ZIG_LOCAL_CACHE_DIR="$_cache_prefix/bazel-zig-cc"
export ZIG_GLOBAL_CACHE_DIR=$ZIG_LOCAL_CACHE_DIR
{maybe_gohack}
exec "{zig}" "{zig_tool}" {maybe_target} "$@"
exec "$ZIG_EXE" "{zig_tool}" {maybe_target} "$@"
"""
# The abomination below adds "-O2" to Go's link-prober command. Saves around
@ -176,14 +184,13 @@ fi
eval set -- "$saved"
"""
def _zig_tool_wrapper(zig_tool, zig, is_windows, cache_prefix, zigtarget):
def _zig_tool_wrapper(zig_tool, is_windows, cache_prefix, zigtarget):
if zig_tool in ["c++", "build-exe", "build-lib", "build-obj"]:
maybe_target = "-target {}".format(zigtarget)
else:
maybe_target = ""
kwargs = dict(
zig = str(zig).replace("/", "\\") + ".exe" if is_windows else zig,
zig_tool = zig_tool,
cache_prefix = cache_prefix,
maybe_gohack = _ZIG_TOOL_GOHACK if (zig_tool == "c++" and not is_windows) else "",
@ -266,7 +273,6 @@ def _zig_repository_impl(repository_ctx):
for target_config in target_structs():
zig_tool_wrapper = _zig_tool_wrapper(
zig_tool,
str(repository_ctx.path("zig")),
os == "windows",
repository_ctx.os.environ.get("BAZEL_ZIG_CC_CACHE_PREFIX", ""),
zigtarget = target_config.zigtarget,