Rename bazel-zig-cc to hermetic_cc_toolchain (#36)

As it says on the tin.

Long live hermetic_cc_toolchain!

toolchain/BUILD.sdk.bazel

@@ -1,8 +1,8 @@
 # Copyright 2023 Uber Technologies, Inc.
 # Licensed under the MIT License
 
-load("@bazel-zig-cc//toolchain:defs.bzl", "declare_files")
-load("@bazel-zig-cc//toolchain/private:cc_toolchains.bzl", "declare_cc_toolchains")
+load("@hermetic_cc_toolchain//toolchain:defs.bzl", "declare_files")
+load("@hermetic_cc_toolchain//toolchain/private:cc_toolchains.bzl", "declare_cc_toolchains")
 
 package(
     default_visibility = ["//visibility:public"],

toolchain/defs.bzl

@@ -1,7 +1,7 @@
 load("@bazel_skylib//lib:paths.bzl", "paths")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_user_netrc", "use_netrc")
-load("@bazel-zig-cc//toolchain/private:defs.bzl", "target_structs", "zig_tool_path")
+load("@hermetic_cc_toolchain//toolchain/private:defs.bzl", "target_structs", "zig_tool_path")
 
 # Directories that `zig c++` includes behind the scenes.
 _DEFAULT_INCLUDE_DIRECTORIES = [
@@ -13,11 +13,8 @@ _DEFAULT_INCLUDE_DIRECTORIES = [
 # Official recommended version. Should use this when we have a usable release.
 URL_FORMAT_RELEASE = "https://ziglang.org/download/{version}/zig-{host_platform}-{version}.{_ext}"
 
-# Caution: nightly releases are purged from ziglang.org after ~90 days. A real
-# solution would be to allow the downstream project specify their own mirrors.
-# This is explained in
-# https://sr.ht/~motiejus/bazel-zig-cc/#alternative-download-urls and is
-# awaiting my attention or your contribution.
+# Caution: nightly releases are purged from ziglang.org after ~90 days. Use the
+# Bazel mirror or your own.
 URL_FORMAT_NIGHTLY = "https://ziglang.org/builds/zig-{host_platform}-{version}.{_ext}"
 
 # Official Bazel's mirror with selected Zig SDK versions. Bazel community is
@@ -176,19 +173,19 @@ def _zig_repository_impl(repository_ctx):
         sha256 = zig_sha256,
     )
 
-    cache_prefix = repository_ctx.os.environ.get("BAZEL_ZIG_CC_CACHE_PREFIX", "")
+    cache_prefix = repository_ctx.os.environ.get("HERMETIC_CC_TOOLCHAIN_CACHE_PREFIX", "")
     if cache_prefix == "":
         if os == "windows":
-            cache_prefix = "C:\\\\Temp\\\\bazel-zig-cc"
+            cache_prefix = "C:\\\\Temp\\\\hermetic_cc_toolchain"
         else:
-            cache_prefix = "/tmp/bazel-zig-cc"
+            cache_prefix = "/tmp/hermetic_cc_toolchain"
 
     repository_ctx.template(
         "tools/launcher.zig",
         Label("//toolchain:launcher.zig"),
         executable = False,
         substitutions = {
-            "{BAZEL_ZIG_CC_CACHE_PREFIX}": cache_prefix,
+            "{HERMETIC_CC_TOOLCHAIN_CACHE_PREFIX}": cache_prefix,
         },
     )
 
@@ -244,7 +241,7 @@ zig_repository = repository_rule(
         "url_formats": attr.string_list(allow_empty = False),
         "host_platform_ext": attr.string_dict(),
     },
-    environ = ["BAZEL_ZIG_CC_CACHE_PREFIX"],
+    environ = ["HERMETIC_CC_TOOLCHAIN_CACHE_PREFIX"],
     implementation = _zig_repository_impl,
 )
 

toolchain/launcher.zig

@@ -36,14 +36,14 @@
 // complain that the compiler is using undeclared directories on the host file
 // system. We do not declare prerequisites using absolute paths, because that
 // busts Bazel's remote cache.
-// * BAZEL_ZIG_CC_CACHE_PREFIX is configurable per toolchain instance, and
+// * HERMETIC_CC_TOOLCHAIN_CACHE_PREFIX is configurable per toolchain instance, and
 // ZIG_GLOBAL_CACHE_DIR and ZIG_LOCAL_CACHE_DIR must be set to its value for
 // all `zig` invocations.
 //
 // Originally this was a Bash script, then a POSIX shell script, then two
-// scripts (one with pre-defined BAZEL_ZIG_CC_CACHE_PREFIX, one without). Then
-// Windows came along with two PowerShell scripts (ports of the POSIX shell
-// scripts), which I kept breaking. Then Bazel 6 came with
+// scripts (one with pre-defined HERMETIC_CC_TOOLCHAIN_CACHE_PREFIX, one
+// without). Then Windows came along with two PowerShell scripts (ports of the
+// POSIX shell scripts), which I kept breaking. Then Bazel 6 came with
 // `--experimental_use_hermetic_linux_sandbox`, which hermetizes the sandbox to
 // the extreme: the sandbox has nothing that is not declared. /bin/sh and its
 // dependencies (/lib/x86_64-linux-gnu/libc.so.6 on my system) are obviously
@@ -67,7 +67,7 @@ const EXE = switch (builtin.target.os.tag) {
     else => "",
 };
 
-const CACHE_DIR = "{BAZEL_ZIG_CC_CACHE_PREFIX}";
+const CACHE_DIR = "{HERMETIC_CC_TOOLCHAIN_CACHE_PREFIX}";
 
 const usage_cpp =
     \\

toolchain/libc/BUILD

@@ -1,7 +1,7 @@
 # Copyright 2023 Uber Technologies, Inc.
 # Licensed under the MIT License
 
-load("@bazel-zig-cc//toolchain/libc:defs.bzl", "declare_libcs")
+load("@hermetic_cc_toolchain//toolchain/libc:defs.bzl", "declare_libcs")
 
 package(
     default_visibility = ["//visibility:public"],

toolchain/libc/defs.bzl

@@ -1,7 +1,7 @@
 # Copyright 2023 Uber Technologies, Inc.
 # Licensed under the MIT License
 
-load("@bazel-zig-cc//toolchain/private:defs.bzl", "LIBCS")
+load("@hermetic_cc_toolchain//toolchain/private:defs.bzl", "LIBCS")
 
 def declare_libcs():
     for libc in LIBCS:

toolchain/libc_aware/platform/BUILD

@@ -1,7 +1,7 @@
 # Copyright 2023 Uber Technologies, Inc.
 # Licensed under the MIT License
 
-load("@bazel-zig-cc//toolchain/platform:defs.bzl", "declare_libc_aware_platforms")
+load("@hermetic_cc_toolchain//toolchain/platform:defs.bzl", "declare_libc_aware_platforms")
 
 package(
     default_visibility = ["//visibility:public"],

toolchain/libc_aware/toolchain/BUILD

@@ -1,7 +1,7 @@
 # Copyright 2023 Uber Technologies, Inc.
 # Licensed under the MIT License
 
-load("@bazel-zig-cc//toolchain/toolchain:defs.bzl", "declare_libc_aware_toolchains")
+load("@hermetic_cc_toolchain//toolchain/toolchain:defs.bzl", "declare_libc_aware_toolchains")
 
 package(
     default_visibility = ["//visibility:public"],

toolchain/platform/BUILD

@@ -1,4 +1,4 @@
-load("@bazel-zig-cc//toolchain/platform:defs.bzl", "declare_platforms")
+load("@hermetic_cc_toolchain//toolchain/platform:defs.bzl", "declare_platforms")
 
 package(
     default_visibility = ["//visibility:public"],

toolchain/platform/defs.bzl

@@ -1,4 +1,4 @@
-load("@bazel-zig-cc//toolchain/private:defs.bzl", "LIBCS")
+load("@hermetic_cc_toolchain//toolchain/private:defs.bzl", "LIBCS")
 
 _CPUS = (("x86_64", "amd64"), ("aarch64", "arm64"))
 _OS = {

toolchain/private/cc_toolchains.bzl

@@ -1,5 +1,5 @@
 load(":defs.bzl", "target_structs", "zig_tool_path")
-load("@bazel-zig-cc//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
+load("@hermetic_cc_toolchain//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
 
 DEFAULT_TOOL_PATHS = {
     "ar": "ar",

toolchain/toolchain/BUILD

@@ -1,4 +1,4 @@
-load("@bazel-zig-cc//toolchain/toolchain:defs.bzl", "declare_toolchains")
+load("@hermetic_cc_toolchain//toolchain/toolchain:defs.bzl", "declare_toolchains")
 
 package(
     default_visibility = ["//visibility:public"],

toolchain/toolchain/defs.bzl

@@ -1,4 +1,4 @@
-load("@bazel-zig-cc//toolchain/private:defs.bzl", "target_structs")
+load("@hermetic_cc_toolchain//toolchain/private:defs.bzl", "target_structs")
 
 def declare_toolchains():
     for target_config in target_structs():