Small cleanup for code sharing. Note, `*ReadFile` will trigger a
CHECK-failure on error; the relevant implementations would previously
have failed silently (empty string).
---------
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
Bumps the npm_and_yarn group with 1 update in the /utils/vscode
directory: [esbuild](https://github.com/evanw/esbuild).
Updates `esbuild` from 0.24.0 to 0.25.0
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/evanw/esbuild/releases">esbuild's
releases</a>.</em></p>
<blockquote>
<h2>v0.25.0</h2>
<p><strong>This release deliberately contains backwards-incompatible
changes.</strong> To avoid automatically picking up releases like this,
you should either be pinning the exact version of <code>esbuild</code>
in your <code>package.json</code> file (recommended) or be using a
version range syntax that only accepts patch upgrades such as
<code>^0.24.0</code> or <code>~0.24.0</code>. See npm's documentation
about <a
href="https://docs.npmjs.com/cli/v6/using-npm/semver/">semver</a> for
more information.</p>
<ul>
<li>
<p>Restrict access to esbuild's development server (<a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-67mh-4wv8-2f99">GHSA-67mh-4wv8-2f99</a>)</p>
<p>This change addresses esbuild's first security vulnerability report.
Previously esbuild set the <code>Access-Control-Allow-Origin</code>
header to <code>*</code> to allow esbuild's development server to be
flexible in how it's used for development. However, this allows the
websites you visit to make HTTP requests to esbuild's local development
server, which gives read-only access to your source code if the website
were to fetch your source code's specific URL. You can read more
information in <a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-67mh-4wv8-2f99">the
report</a>.</p>
<p>Starting with this release, <a
href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS">CORS</a>
will now be disabled, and requests will now be denied if the host does
not match the one provided to <code>--serve=</code>. The default host is
<code>0.0.0.0</code>, which refers to all of the IP addresses that
represent the local machine (e.g. both <code>127.0.0.1</code> and
<code>192.168.0.1</code>). If you want to customize anything about
esbuild's development server, you can <a
href="https://esbuild.github.io/api/#serve-proxy">put a proxy in front
of esbuild</a> and modify the incoming and/or outgoing requests.</p>
<p>In addition, the <code>serve()</code> API call has been changed to
return an array of <code>hosts</code> instead of a single
<code>host</code> string. This makes it possible to determine all of the
hosts that esbuild's development server will accept.</p>
<p>Thanks to <a
href="https://github.com/sapphi-red"><code>@sapphi-red</code></a> for
reporting this issue.</p>
</li>
<li>
<p>Delete output files when a build fails in watch mode (<a
href="https://redirect.github.com/evanw/esbuild/issues/3643">#3643</a>)</p>
<p>It has been requested for esbuild to delete files when a build fails
in watch mode. Previously esbuild left the old files in place, which
could cause people to not immediately realize that the most recent build
failed. With this release, esbuild will now delete all output files if a
rebuild fails. Fixing the build error and triggering another rebuild
will restore all output files again.</p>
</li>
<li>
<p>Fix correctness issues with the CSS nesting transform (<a
href="https://redirect.github.com/evanw/esbuild/issues/3620">#3620</a>,
<a
href="https://redirect.github.com/evanw/esbuild/issues/3877">#3877</a>,
<a
href="https://redirect.github.com/evanw/esbuild/issues/3933">#3933</a>,
<a
href="https://redirect.github.com/evanw/esbuild/issues/3997">#3997</a>,
<a
href="https://redirect.github.com/evanw/esbuild/issues/4005">#4005</a>,
<a href="https://redirect.github.com/evanw/esbuild/pull/4037">#4037</a>,
<a
href="https://redirect.github.com/evanw/esbuild/pull/4038">#4038</a>)</p>
<p>This release fixes the following problems:</p>
<ul>
<li>
<p>Naive expansion of CSS nesting can result in an exponential blow-up
of generated CSS if each nesting level has multiple selectors.
Previously esbuild sometimes collapsed individual nesting levels using
<code>:is()</code> to limit expansion. However, this collapsing wasn't
correct in some cases, so it has been removed to fix correctness
issues.</p>
<pre lang="css"><code>/* Original code */
.parent {
> .a,
> .b1 > .b2 {
color: red;
}
}
<p>/* Old output (with --supported:nesting=false) */<br />
.parent > :is(.a, .b1 > .b2) {<br />
color: red;<br />
}</p>
<p>/* New output (with --supported:nesting=false) */<br />
.parent > .a,<br />
.parent > .b1 > .b2 {<br />
color: red;<br />
}<br />
</code></pre></p>
<p>Thanks to <a
href="https://github.com/tim-we"><code>@tim-we</code></a> for working
on a fix.</p>
</li>
<li>
<p>The <code>&</code> CSS nesting selector can be repeated multiple
times to increase CSS specificity. Previously esbuild ignored this
possibility and incorrectly considered <code>&&</code> to have
the same specificity as <code>&</code>. With this release, this
should now work correctly:</p>
<pre lang="css"><code>/* Original code (color should be red) */
</code></pre>
</li>
</ul>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/evanw/esbuild/blob/main/CHANGELOG-2024.md">esbuild's
changelog</a>.</em></p>
<blockquote>
<h1>Changelog: 2024</h1>
<p>This changelog documents all esbuild versions published in the year
2024 (versions 0.19.12 through 0.24.2).</p>
<h2>0.24.2</h2>
<ul>
<li>
<p>Fix regression with <code>--define</code> and
<code>import.meta</code> (<a
href="https://redirect.github.com/evanw/esbuild/issues/4010">#4010</a>,
<a
href="https://redirect.github.com/evanw/esbuild/issues/4012">#4012</a>,
<a
href="https://redirect.github.com/evanw/esbuild/pull/4013">#4013</a>)</p>
<p>The previous change in version 0.24.1 to use a more expression-like
parser for <code>define</code> values to allow quoted property names
introduced a regression that removed the ability to use
<code>--define:import.meta=...</code>. Even though <code>import</code>
is normally a keyword that can't be used as an identifier, ES modules
special-case the <code>import.meta</code> expression to behave like an
identifier anyway. This change fixes the regression.</p>
<p>This fix was contributed by <a
href="https://github.com/sapphi-red"><code>@sapphi-red</code></a>.</p>
</li>
</ul>
<h2>0.24.1</h2>
<ul>
<li>
<p>Allow <code>es2024</code> as a target in <code>tsconfig.json</code>
(<a
href="https://redirect.github.com/evanw/esbuild/issues/4004">#4004</a>)</p>
<p>TypeScript recently <a
href="https://devblogs.microsoft.com/typescript/announcing-typescript-5-7/#support-for---target-es2024-and---lib-es2024">added
<code>es2024</code></a> as a compilation target, so esbuild now supports
this in the <code>target</code> field of <code>tsconfig.json</code>
files, such as in the following configuration file:</p>
<pre lang="json"><code>{
"compilerOptions": {
"target": "ES2024"
}
}
</code></pre>
<p>As a reminder, the only thing that esbuild uses this field for is
determining whether or not to use legacy TypeScript behavior for class
fields. You can read more in <a
href="https://esbuild.github.io/content-types/#tsconfig-json">the
documentation</a>.</p>
<p>This fix was contributed by <a
href="https://github.com/billyjanitsch"><code>@billyjanitsch</code></a>.</p>
</li>
<li>
<p>Allow automatic semicolon insertion after
<code>get</code>/<code>set</code></p>
<p>This change fixes a grammar bug in the parser that incorrectly
treated the following code as a syntax error:</p>
<pre lang="ts"><code>class Foo {
get
*x() {}
set
*y() {}
}
</code></pre>
<p>The above code will be considered valid starting with this release.
This change to esbuild follows a <a
href="https://redirect.github.com/microsoft/TypeScript/pull/60225">similar
change to TypeScript</a> which will allow this syntax starting with
TypeScript 5.7.</p>
</li>
<li>
<p>Allow quoted property names in <code>--define</code> and
<code>--pure</code> (<a
href="https://redirect.github.com/evanw/esbuild/issues/4008">#4008</a>)</p>
<p>The <code>define</code> and <code>pure</code> API options now accept
identifier expressions containing quoted property names. Previously all
identifiers in the identifier expression had to be bare identifiers.
This change now makes <code>--define</code> and <code>--pure</code>
consistent with <code>--global-name</code>, which already supported
quoted property names. For example, the following is now possible:</p>
<pre lang="js"><code></code></pre>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/evanw/esbuild/commit/e9174d671b1882758cd32ac5e146200f5bee3e45"><code>e9174d6</code></a>
publish 0.25.0 to npm</li>
<li><a
href="https://github.com/evanw/esbuild/commit/c27dbebb9e7a55dd9a084dd151dddd840787490e"><code>c27dbeb</code></a>
fix <code>hosts</code> in <code>plugin-tests.js</code></li>
<li><a
href="https://github.com/evanw/esbuild/commit/6794f602a453cf0255bcae245871de120a89a559"><code>6794f60</code></a>
fix <code>hosts</code> in <code>node-unref-tests.js</code></li>
<li><a
href="https://github.com/evanw/esbuild/commit/de85afd65edec9ebc44a11e245fd9e9a2e99760d"><code>de85afd</code></a>
Merge commit from fork</li>
<li><a
href="https://github.com/evanw/esbuild/commit/da1de1bf77a65f06654b49878d9ec4747ddaa21f"><code>da1de1b</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4065">#4065</a>:
bitwise operators can return bigints</li>
<li><a
href="https://github.com/evanw/esbuild/commit/f4e9d19fb20095a98bf40634f0380f6a16be91e7"><code>f4e9d19</code></a>
switch case liveness: <code>default</code> is always last</li>
<li><a
href="https://github.com/evanw/esbuild/commit/7aa47c3e778ea04849f97f18dd9959df88fa0886"><code>7aa47c3</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4028">#4028</a>:
minify live/dead <code>switch</code> cases better</li>
<li><a
href="https://github.com/evanw/esbuild/commit/22ecd306190b8971ec4474b5485266c20350e266"><code>22ecd30</code></a>
minify: more constant folding for strict equality</li>
<li><a
href="https://github.com/evanw/esbuild/commit/4cdf03c03697128044fa8fb76e5c478e9765b353"><code>4cdf03c</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4053">#4053</a>:
reordering of <code>.tsx</code> in <code>node_modules</code></li>
<li><a
href="https://github.com/evanw/esbuild/commit/dc719775b7140120916bd9e6777ca1cb8a1cdc0e"><code>dc71977</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/3692">#3692</a>:
<code>0</code> now picks a random ephemeral port</li>
<li>Additional commits viewable in <a
href="https://github.com/evanw/esbuild/compare/v0.24.0...v0.25.0">compare
view</a></li>
</ul>
</details>
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Signed-off-by: dependabot[bot] <support@github.com>
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This PR adds a new command to the Carbon VSCode extension "carbon:
Restart language server" which acts similar to clangd / bazel
extensions. While not useful during regular working of the extension
this helps when LSP either crashes or the toolchain is updated.
In order to support graceful restart, I needed to add a Call handler for
"shutdown" which is noop for now. Lsp clients always call shutdown
before sending exit.
---------
Co-authored-by: jonmeow <jperkins@google.com>
Introduce a principle that the Carbon language should not encroach on
the
developer's namespace. Satisfy this principle by making `Core` a
keyword.
---------
Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
The WORKSPACE file is deprecated; support is already off by default, and
it'll be removed in the next major bazel release. Our main dependency is
tree-sitter, and I'm trying to address that here.
We're currently using https://github.com/elliottt/rules_tree_sitter, but
that hasn't been updated in a couple years, meaning it lacks
MODULE.bazel support. In the registry, there's
https://registry.bazel.build/modules/tree-sitter-bazel, but this is only
the *parser* libraries of tree-sitter, not the *generator*. I'm using it
for that much, at least.
For the *generator*, which transforms grammar.js to parser.c/h, I'm just
requiring a non-hermetic invocation (i.e., people who want to work on it
will need to install tree-sitter; see the README.md updates). I tried
running it manually, but parser.c is about 600 KB; pre-commit rejects
files that large and I don't think an exception makes sense to override
for this (it'd probably also grow substantially if the grammar were
updated to cover more syntax). In order to make the non-hermetic call
not break "bazel build //..." for most developers, I'm marking most
targets in the package as manual.
Note, I did look long and hard at using `aspect_rules_js`/`rules_nodejs`
to invoke npm. This took a lot of time, and I have a commit that's
mostly working, except I hit a point where it uses `declare_symlink`
which we disallow for compatibility reasons (commit "Lots of work for
figuring out rule_js uses declare_symlink" on the PR). As a consequence,
I think we can't use the primary supported ways to have hermetic npm
calls.
Also, `treesitter` -> `tree_sitter` because it's generally called
`tree-sitter`, two words. We even had a `treesitter/src/tree_sitter`
directory so it's a bit inconsistent.
As far as bugs here, the parser library breaks bazel queries, e.g. the
error:
```
ERROR: Evaluation of query "somepath(//..., @llvm-project//third-party/unittest:gtest)" failed: preloading transitive closure failed: no such package '@@[unknown repo 'platforms' requested from @@tree-sitter-bazel+]//': The repository '@@[unknown repo 'platforms' requested from @@tree-sitter-bazel+]' could not be resolved: No repository visible as '@platforms' from repository '@@tree-sitter-bazel+'
```
I'm just excluding tree_sitter from queries where I can to work around
the error.
The instructions did not match the example. The VSCode settings suggests
the example is the correct one.
Co-authored-by: Josh L <josh11b@users.noreply.github.com>
This restores the symlinks for the installation, but teaches the busybox
info search to look for a relative path to the busybox binary itself
before walking through symlinks. This let's it find the tree structure
when directly invoking `prefix_root/bin/carbon` or similar, either
inside of a Bazel rule or from the command line, and mirrors how we
expect the installed tree to look. This works even when Bazel resolves
the symlink target fully, and potentially to something nonsensical like
a CAS file.
In order to make a convenient Bazel target that can be used with `bazel
run //toolchain`, this adds an override to explicitly set the desired
argv[0] to use when selecting a mode for the busybox and a busybox
binary. Currently, the workaround uses an environment variable because
that required the least amount of plumbing, and seems a useful override
mechanism generally, but I'm open to other approaches.
This should allow a few things to work a bit more nicely:
- It should handle sibling symlinks like `clang++` to `clang` or
`ld.lld` to `lld`, where that symlink in turn points at the busybox.
We want to use *initial* `argv[0]` value to select the mode there.
- It avoids bouncing through Python (or other subprocesses) when
invoking the `carbon` binary in Bazel rules, which will be nice for
building the example code and benchmarking.
It does come at a cost of removing one feature: the initial symlink
can't be some unrelated alias like `my_carbon_symlink` -- we expect the
*first* argv[0] name to have the meaningful filename for selecting
a busybox mode.
It also trades the complexity of the Python script for some complexity
in the busybox search in order to look for a relative `carbon-busybox`
binary. On the whole, I think that tradeoff is worthwhile, but it isn't
free.
---------
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
The extension.ts tries to provide a default, but it's not working the
way I expect. So in addition, provide it in properties, which seems to
work better.
Removes the separate language server binary; I'm not sure we need to
provide it. Instead, `carbon language-server` is added as a subcommand.
Moves //language_server to //toolchain/language_server. Splits into a
trivial language_server.h, and a substantive server.h. I wasn't sure
about a better name, but wanted the split similar to check/check.h,
lex/lex.h, etc. At the same time, the class is probably going to be a
little big so not a good fit to through into just a cpp file.
This fixes some style issues with the language server class, but
generally I'm trying to not address things here in order to keep it
simpler.
This is a modifier if it appears before an introducer and a control flow
keyword if it appears before `=>`. Use introducer highlighting if it's
neither.
VSCode's JSON parser no longer accepts comments in at least textmate
grammars, so remove the comments. It's unclear whether VSCode changed
here or whether this hasn't worked since the comments were added.
Clean up the textmate grammar: refactor, add some missing operators and
keywords, classify keywords as introducer / modifier as appropriate, fix
comment grammar to require space after `//`, and generalize recognition
of iN, fN, uN to recognize all such type literals.
Be more cautious in language server -- I was seeing frequent crashes for
`IdentifierName` parse nodes whose token was not actually an identifier,
presumably due to error recovery.
Most of these are places where we failed to include a header file and
simply never got an error about this. The fix is to include the header
file.
Most other cases are functions that should have been marked `static` but
were not. Finding all of these was a main motivation for me enabling the
warning despite how much work it is.
One complicating factor was that we weren't including the `handle.h` for
all the state-based handler functions. While this isn't a tiny amount of
code, it is just declarations and doesn't add any extra dependencies. It
also lets us have the checking for which functions need to be `static`
and which don't. For the `parse` library I had to add the `handle.h`
header as well, I tried to match the design of it in `check`.
I have also had to work around a bug in the warning, but given the value
it seems to be providing, that seems reasonable. I've filed the bug
upstream: https://github.com/llvm/llvm-project/issues/94138
I also had to use some hacks to work around limitations of Bazel rules
that wrap `cc_library` rules and don't expose `copts`. I filed a bug for
`cc_proto_library` specifically:
~https://github.com/bazelbuild/bazel/issues/22610~https://github.com/bazelbuild/bazel/issues/4446
This PR adds filetype highlighting support to block string literals in
the TextMate grammar.
After adding the regex in the `begin` of the block string literal,
`beginCaptures` is used to access the first capturing group of the regex
(which captures the filetype) and apply the `constant.character.escape`
rule.

Closes#3641
This sets things up to use `bazel` to run `clang-tidy` using
https://github.com/erenon/bazel_clang_tidy.
I'm fixing issues outside of explorer, and disabling clang-tidy for
targets in explorer that have legacy issues. I was going to disable
clang-tidy for targets in explorer such as interpreter anyways, because
they're slow to parse, and just extended that to the currently failing
targets.
Running `bazel test //...` reported:
```
Test execution time outside of range for MODERATE tests.
Consider setting timeout="short" or size="small".
```
This change adds size="small" to avoid such warnings being reported.
---------
Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
In C, the signature `f()` is distinct from `f(void)` -- dating from K&R
style prototype-less functions. We need to use the `f(void)` form for
the scanner creation function so that it can be called by function
pointer `void *(*)(void)` without UB.
This was causing a local test that includes treesitter to fail with our
fastbuild that enables most sanitizers. With this, we may be able to
enable treesitter on our CI as well, but it at least fixes my local test
runs.
This file group exists to allow a `genquery` rule and a Python test to
verify our non-test dependency graph. We don't actually need to build
the binaries in the file group as part of that. The `genquery` rule
seems to do the right thing -- building it directly doesn't cause the
binaries in the group to be built. But without a manual tag, the group
itself is part of `:all` and thus part of `//...` and part of the rules
that will be built even with PR #3106. A consequence is that any change
to the toolchain causes several other binaries to be built as well
because this file group is in the impacted set. Making it manual should
avoid all of this, and without breaking the actual use from `genquery`.
For example, before this change, in a fully cached build after a `bazel
clean`:
```
> bazel test //bazel/check_deps:all
INFO: Invocation ID: 2d83ebee-4c00-425d-be33-23f42b079614
INFO: Analyzed 3 targets (103 packages loaded, 7137 targets configured).
INFO: Found 2 targets and 1 test target...
INFO: Elapsed time: 4.081s, Critical Path: 2.61s
INFO: 3111 processes: 2796 disk cache hit, 315 internal.
INFO: Build completed successfully, 3111 total actions
```
After this change:
```
> bazel test //bazel/check_deps:al
INFO: Invocation ID: c94089e8-a420-4d3c-9902-134e6b55b297
INFO: Analyzed 2 targets (92 packages loaded, 568 targets configured).
INFO: Found 1 target and 1 test target...
INFO: Elapsed time: 0.700s, Critical Path: 0.01s
INFO: 7 processes: 2 disk cache hit, 5 internal.
INFO: Build completed successfully, 7 total actions
```
While here, re-generate the file group, and fix several issues it
uncovers: mark test utilities as `testonly` and update our LLVM package
allowlist to include `clangd`'s package.
The main motivation for this is to get python loads in using the
`native-py` lint fix. However, enabling that made me wonder, maybe we
should fix in general?
`native-cc` is delayed, but not wholly cancelled (and `native-py`
picking up might indicate `native-cc` won't be too far behind). There's
also some automated fixes for `.append` and dict sorting -- this felt
okay to me, maybe not something to eagerly add but probably not worth
stopping buildifier from fixing (I've noticed the warnings in the past
and had been ignoring them).
Running everything does mean that load orders are sorted automatically
now, which I think is a positive. Most generally, I think these fixes
aren't _harmful_, and having them done automatically seems beneficial:
my biggest concern about `native-py` and `native-cc` was actually that
regressions wouldn't be caught, but this addresses that issue
automatically.
Add a language server for carbon as part of GSoC.
This currently does code outline using toolchain parser.
See development steps in utils/vscode/README.md for running and using
language server.
Also make minor updates to the skeletal design in
docs/design/name_lookup.md following #2113, as there are no longer any prelude names that are made available to unqualified name lookup by default.
Add `type` to the keyword list in
docs/design/lexical_conventions/words.md, following #2360.
codespell now sees "falsy" as a mis-spelling of either "false" or "falsely"; adding it since I think this it's occasionally used this way in programming. e.g., https://developer.mozilla.org/en-US/docs/Glossary/Falsy
Adjusts to use the new check-copyright support for lines starting with a dash.
This will allow us to automatically create and maintain specific repos
based on the main repository here, pulling key files like the license
and other infrastructure and pushing them systematically to a narrow
repo. Things like editor plugins that are best packaged and installed
from a separate repos can still be developed in a central place, even
potentially sharing common things like grammars where useful.
Currently this will maintain a Vim plugin repository out of the
`utils/vim` directory, but can be easily expanded for other systems.
PR to add a vim syntax file to support syntax highlighting for .carbon files. Since the Carbon language specification is still in progress, a single syntax file is easier to maintain and adapt to design changes in Carbon. After the language syntax has matured and stabilized, advanced tooling such as Treesitter and Language Servers can take over the syntax highlighting in neovim.
### Highlighting Support
- comments and preprocessors (RUN, CHECK, etc)
- string and numeric literals
- primitive type names, classes, aliases
- control flow constructs
- identifier names
- package and library declarations
- most keywords mentioned in `docs/design/README.md`
### With a Dark Colorscheme:

This image is longer than I thought, so I'm not posting what it looks like in a light colorscheme, but it should look fine as long as vim highlight-groups are properly defined.
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
TextMate is the go-to definition language for syntax highlighting for editors lack dedicated language support for a given programming language. This patch contains a very minimal, yet functional TextMate bundle definition for Carbon.
This allows Carbon users to import the TextMate bundle into their editors to get basic syntax highlighting for Carbon code until we have a more solid specification for the language (that's when the fun with dedicated plugins/extensions begins!).
**Support**
- String literals with escape codes (currently using C highlighting rules)
- Numeric literals in decimal, hexadecimal and binary (lacks _ separator support though)
- Single and multi-line comments
- Highlighting of all? (let me know if some are missing) keywords in the language
Here is an image of the highlighting in action in IntelliJ Dracula mode

Following a short discussion on Discord about where to locate developer tools, I suggest we collect developer utils inside a `/utils` directory at the repository root.
The idea behind this directory is taken from LLVM's utils directories in the various LLVM subprojects which host tooling such as Vim and VSCode extensions, utility scripts, and other useful bits for developers developing or using LLVM.
This patch moves the highlightjs code into said utils directory.
Let me know if there's anything else that's missing 😄
cc @jonmeow