traxys/tree-sitter
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Overhaul CLI error handling to allow multiple levels of context

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This commit is contained in:
Max Brunsfeld 2019-05-30 16:52:30 -07:00
parent b7bc2d30ae
commit d274e81d0d
17 changed files with 214 additions and 129 deletions
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13
cli/src/web_ui.rs
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@ -1,3 +1,4 @@
use super::error::Error;
use super::wasm;
use std::fs;
use std::net::TcpListener;
@ -24,20 +25,22 @@ pub fn serve(grammar_path: &Path) {
let url = format!("127.0.0.1:{}", port);
let server = Server::http(&url).expect("Failed to start web server");
let grammar_name = wasm::get_grammar_name(&grammar_path.join("src"))
.map_err(|e| format!("Failed to get wasm filename: {:?}", e))
.map_err(Error::wrap(|| "Failed to get wasm filename"))
.unwrap();
let wasm_filename = format!("tree-sitter-{}.wasm", grammar_name);
let language_wasm = fs::read(grammar_path.join(&wasm_filename))
.map_err(|_| {
.map_err(Error::wrap(|| {
format!(
"Failed to read '{}'. Run `tree-sitter build-wasm` first.",
"Failed to read {}. Run `tree-sitter build-wasm` first.",
wasm_filename
)
})
}))
.unwrap();
webbrowser::open(&format!("http://127.0.0.1:{}", port))
.map_err(|e| format!("Failed to open '{}' in a web browser. Error: {}", url, e))
.map_err(Error::wrap(|| {
format!("Failed to open '{}' in a web browser", url)
}))
.unwrap();
let html = HTML