mirror of https://github.com/helix-editor/helix
migrate helix-syntax crate into helix-core and helix-term
helix-syntax mostly existed for the sake of the build task which checks and compiles the submodules. Since we won't be relying on that process anymore, it doesn't end up making much sense to have a very thin crate just for some functions that we could port to helix-core. The remaining build-related code is moved to helix-term which will be able to provide grammar builds through the --build-grammars CLI flag.pull/1784/head
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[package]
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name = "helix-syntax"
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version = "0.6.0"
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authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
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edition = "2021"
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license = "MPL-2.0"
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description = "Tree-sitter grammars support"
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categories = ["editor"]
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repository = "https://github.com/helix-editor/helix"
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homepage = "https://helix-editor.com"
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include = ["src/**/*", "languages/**/*", "build.rs", "!**/docs/**/*", "!**/test/**/*", "!**/examples/**/*", "!**/build/**/*"]
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[dependencies]
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tree-sitter = "0.20"
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libloading = "0.7"
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anyhow = "1"
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[build-dependencies]
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cc = { version = "1" }
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threadpool = { version = "1.0" }
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anyhow = "1"
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helix-syntax
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============
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Syntax highlighting for helix, (shallow) submodules resides here.
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Differences from nvim-treesitter
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--------------------------------
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As the syntax are commonly ported from
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<https://github.com/nvim-treesitter/nvim-treesitter>.
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Note that we do not support the custom `#any-of` predicate which is
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supported by neovim so one needs to change it to `#match` with regex.
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use anyhow::{Context, Result};
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use libloading::{Library, Symbol};
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use tree_sitter::Language;
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fn replace_dashes_with_underscores(name: &str) -> String {
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name.replace('-', "_")
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}
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#[cfg(unix)]
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const DYLIB_EXTENSION: &str = "so";
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#[cfg(windows)]
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const DYLIB_EXTENSION: &str = "dll";
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pub fn get_language(runtime_path: &std::path::Path, name: &str) -> Result<Language> {
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let name = name.to_ascii_lowercase();
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let mut library_path = runtime_path.join("grammars").join(&name);
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// TODO: duplicated under build
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library_path.set_extension(DYLIB_EXTENSION);
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let library = unsafe { Library::new(&library_path) }
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.with_context(|| format!("Error opening dynamic library {:?}", &library_path))?;
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let language_fn_name = format!("tree_sitter_{}", replace_dashes_with_underscores(&name));
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let language = unsafe {
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let language_fn: Symbol<unsafe extern "C" fn() -> Language> = library
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.get(language_fn_name.as_bytes())
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.with_context(|| format!("Failed to load symbol {}", language_fn_name))?;
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language_fn()
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};
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std::mem::forget(library);
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Ok(language)
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}
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