mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-03 22:02:51 +01:00
Jon Ross-Perkins
6f6e46ef57
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.
41 lines
920 B
Bash
Executable File
41 lines
920 B
Bash
Executable File
#!/bin/sh
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# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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# Exceptions. See /LICENSE for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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set -euo pipefail
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ROOT="$(git rev-parse --show-toplevel)"
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cd "$ROOT/utils/tree_sitter"
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tree-sitter generate --no-bindings
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mkdir -p "$ROOT/.helix"
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cat > "$ROOT/.helix/languages.toml" << EOF
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use-grammars = { only = ["carbon"] }
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[[language]]
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name = "carbon"
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scope = "source.carbon"
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file-types = ["carbon"]
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comment-token = "//"
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indent = { tab-width = 2, unit = " " }
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roots = [".git"]
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[[grammar]]
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name = "carbon"
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source = { path = "$PWD" }
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EOF
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mkdir -p ~/.config/helix/runtime/grammars ~/.config/helix/runtime/queries
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ln -sTf $PWD/queries ~/.config/helix/runtime/queries/carbon
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hx --grammar build
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echo
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hx --health carbon
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echo
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echo 'use `hx path/to/foo.carbon` to open files'
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echo 'Try different themes with :theme'
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