rewrite translation to rmake

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -10,5 +10,4 @@ run-make/macos-deployment-target/Makefile
 run-make/reproducible-build/Makefile
 run-make/split-debuginfo/Makefile
 run-make/symbol-mangling-hashed/Makefile
-run-make/translation/Makefile
 run-make/x86_64-fortanix-unknown-sgx-lvi/Makefile

tests/run-make/libs-through-symlinks/rmake.rs

@@ -4,11 +4,14 @@
 // checks that compilation succeeds through use of the symlink.
 // See https://github.com/rust-lang/rust/issues/13890
 
+//@ needs-symlink
+
 use run_make_support::{cwd, path, rfs, rust_lib_name, rustc};
 
 fn main() {
     rfs::create_dir("outdir");
     rustc().input("foo.rs").output(path("outdir").join(rust_lib_name("foo"))).run();
     rfs::create_symlink(path("outdir").join(rust_lib_name("foo")), rust_lib_name("foo"));
+    // RUSTC_LOG is used for debugging and is not crucial to the test.
     rustc().env("RUSTC_LOG", "rustc_metadata::loader").input("bar.rs").run();
 }

tests/run-make/translation/Makefile

@@ -0,0 +1,121 @@
+// Various tests on Fluent bundles, useful to change the compiler's language
+// to the one requested by the user. Check each comment header to learn the purpose
+// of each test case.
+// See https://github.com/rust-lang/rust/pull/95512
+
+//@ needs-symlink
+
+use run_make_support::{path, rfs, rustc};
+
+fn main() {
+    builtin_fallback_bundle();
+    custom_bundle();
+    interpolated_variable_missing();
+    desired_message_missing();
+    custom_locale_from_sysroot();
+    no_locale_in_sysroot();
+    locale_in_sysroot_is_invalid();
+}
+
+fn builtin_fallback_bundle() {
+    // Check that the test works normally, using the built-in fallback bundle.
+    rustc().input("test.rs").run_fail().assert_stderr_contains("struct literal body without path");
+}
+
+fn custom_bundle() {
+    // Check that a primary bundle can be loaded and will be preferentially used
+    // where possible.
+    rustc()
+        .env("RUSTC_TRANSLATION_NO_DEBUG_ASSERT", "1")
+        .arg("-Ztranslate-additional-ftl=working.ftl")
+        .input("test.rs")
+        .run_fail()
+        .assert_stderr_contains("this is a test message");
+}
+
+fn interpolated_variable_missing() {
+    // Check that a primary bundle with a broken message (e.g. a interpolated
+    // variable is missing) will use the fallback bundle.
+    rustc()
+        .env("RUSTC_TRANSLATION_NO_DEBUG_ASSERT", "1")
+        .arg("-Ztranslate-additional-ftl=missing.ftl")
+        .input("test.rs")
+        .run_fail()
+        .assert_stderr_contains("struct literal body without path");
+}
+
+fn desired_message_missing() {
+    // Check that a primary bundle without the desired message will use the fallback
+    // bundle.
+    rustc()
+        .env("RUSTC_TRANSLATION_NO_DEBUG_ASSERT", "1")
+        .arg("-Ztranslate-additional-ftl=broken.ftl")
+        .input("test.rs")
+        .run_fail()
+        .assert_stderr_contains("struct literal body without path");
+}
+
+fn custom_locale_from_sysroot() {
+    // Check that a locale can be loaded from the sysroot given a language
+    // identifier by making a local copy of the sysroot and adding the custom locale
+    // to it.
+    let sysroot =
+        rustc().env("RUSTC_TRANSLATION_NO_DEBUG_ASSERT", "1").print("sysroot").run().stdout_utf8();
+    let sysroot = sysroot.trim();
+    rfs::create_dir("fakeroot");
+    symlink_all_entries(&sysroot, "fakeroot");
+    rfs::remove_file("fakeroot/lib");
+    rfs::create_dir("fakeroot/lib");
+    symlink_all_entries(path(&sysroot).join("lib"), "fakeroot/lib");
+    rfs::remove_file("fakeroot/lib/rustlib");
+    rfs::create_dir("fakeroot/lib/rustlib");
+    symlink_all_entries(path(&sysroot).join("lib/rustlib"), "fakeroot/lib/rustlib");
+    rfs::remove_file("fakeroot/lib/rustlib/src");
+    rfs::create_dir("fakeroot/lib/rustlib/src");
+    symlink_all_entries(path(&sysroot).join("lib/rustlib/src"), "fakeroot/lib/rustlib/src");
+    // When download-rustc is enabled, `sysroot` will have a share directory. Delete the link to it.
+    if path("fakeroot/share").exists() {
+        rfs::remove_file("fakeroot/share");
+    }
+    rfs::create_dir_all("fakeroot/share/locale/zh-CN");
+    rfs::create_symlink("working.ftl", "fakeroot/share/locale/zh-CN/basic-translation.ftl");
+    rustc()
+        .env("RUSTC_TRANSLATION_NO_DEBUG_ASSERT", "1")
+        .arg("-Ztranslate-lang=zh-CN")
+        .input("test.rs")
+        .sysroot("fakeroot")
+        .run_fail()
+        .assert_stderr_contains("this is a test message");
+}
+
+fn no_locale_in_sysroot() {
+    // Check that the compiler errors out when the sysroot requested cannot be
+    // found. This test might start failing if there actually exists a Klingon
+    // translation of rustc's error messages.
+    rustc()
+        .env("RUSTC_TRANSLATION_NO_DEBUG_ASSERT", "1")
+        .arg("-Ztranslate-lang=tlh")
+        // .input("test.rs")
+        .run_fail()
+        .assert_stderr_contains("missing locale directory");
+}
+
+fn locale_in_sysroot_is_invalid() {
+    // Check that the compiler errors out when the directory for the locale in the
+    // sysroot is actually a file.
+    rfs::remove_dir_all("fakeroot/share/locale/zh-CN");
+    rfs::create_file("fakeroot/share/locale/zh-CN");
+    rustc()
+        .env("RUSTC_TRANSLATION_NO_DEBUG_ASSERT", "1")
+        .arg("-Ztranslate-lang=zh-CN")
+        .input("test.rs")
+        .sysroot("fakeroot")
+        .run_fail()
+        .assert_stderr_contains("`$sysroot/share/locales/$locale` is not a directory");
+}
+
+fn symlink_all_entries<P: AsRef<std::path::Path>>(dir: P, fakepath: &str) {
+    for found_path in rfs::shallow_find_dir_entries(dir) {
+        rfs::create_symlink(&found_path, path(fakepath).join(found_path.file_name().unwrap()));
+    }
+}