produce error when grammar build fails (#6795)

* produce error when grammar build fails

* print which grammar build failed

helix-loader/src/grammar.rs

@@ -1,4 +1,4 @@
-use anyhow::{anyhow, Context, Result};
+use anyhow::{anyhow, bail, Context, Result};
 use serde::{Deserialize, Serialize};
 use std::fs;
 use std::time::SystemTime;
@@ -98,15 +98,12 @@ pub fn fetch_grammars() -> Result<()> {
     let mut git_up_to_date = 0;
     let mut non_git = Vec::new();
 
-    for res in results {
+    for (grammar_id, res) in results {
         match res {
             Ok(FetchStatus::GitUpToDate) => git_up_to_date += 1,
-            Ok(FetchStatus::GitUpdated {
-                grammar_id,
-                revision,
-            }) => git_updated.push((grammar_id, revision)),
-            Ok(FetchStatus::NonGit { grammar_id }) => non_git.push(grammar_id),
-            Err(e) => errors.push(e),
+            Ok(FetchStatus::GitUpdated { revision }) => git_updated.push((grammar_id, revision)),
+            Ok(FetchStatus::NonGit) => non_git.push(grammar_id),
+            Err(e) => errors.push((grammar_id, e)),
         }
     }
 
@@ -138,10 +135,10 @@ pub fn fetch_grammars() -> Result<()> {
 
     if !errors.is_empty() {
         let len = errors.len();
-        println!("{} grammars failed to fetch", len);
-        for (i, error) in errors.into_iter().enumerate() {
-            println!("\tFailure {}/{}: {}", i + 1, len, error);
+        for (i, (grammar, error)) in errors.into_iter().enumerate() {
+            println!("Failure {}/{len}: {grammar} {error}", i + 1);
         }
+        bail!("{len} grammars failed to fetch");
     }
 
     Ok(())
@@ -158,11 +155,11 @@ pub fn build_grammars(target: Option<String>) -> Result<()> {
     let mut already_built = 0;
     let mut built = Vec::new();
 
-    for res in results {
+    for (grammar_id, res) in results {
         match res {
             Ok(BuildStatus::AlreadyBuilt) => already_built += 1,
-            Ok(BuildStatus::Built { grammar_id }) => built.push(grammar_id),
-            Err(e) => errors.push(e),
+            Ok(BuildStatus::Built) => built.push(grammar_id),
+            Err(e) => errors.push((grammar_id, e)),
         }
     }
 
@@ -179,10 +176,10 @@ pub fn build_grammars(target: Option<String>) -> Result<()> {
 
     if !errors.is_empty() {
         let len = errors.len();
-        println!("{} grammars failed to build", len);
-        for (i, error) in errors.into_iter().enumerate() {
-            println!("\tFailure {}/{}: {}", i, len, error);
+        for (i, (grammar_id, error)) in errors.into_iter().enumerate() {
+            println!("Failure {}/{len}: {grammar_id} {error}", i + 1);
         }
+        bail!("{len} grammars failed to build");
     }
 
     Ok(())
@@ -214,7 +211,7 @@ fn get_grammar_configs() -> Result<Vec<GrammarConfiguration>> {
     Ok(grammars)
 }
 
-fn run_parallel<F, Res>(grammars: Vec<GrammarConfiguration>, job: F) -> Vec<Result<Res>>
+fn run_parallel<F, Res>(grammars: Vec<GrammarConfiguration>, job: F) -> Vec<(String, Result<Res>)>
 where
     F: Fn(GrammarConfiguration) -> Result<Res> + Send + 'static + Clone,
     Res: Send + 'static,
@@ -229,7 +226,7 @@ fn run_parallel<F, Res>(grammars: Vec<GrammarConfiguration>, job: F) -> Vec<Resu
         pool.execute(move || {
             // Ignore any SendErrors, if any job in another thread has encountered an
             // error the Receiver will be closed causing this send to fail.
-            let _ = tx.send(job(grammar));
+            let _ = tx.send((grammar.grammar_id.clone(), job(grammar)));
         });
     }
 
@@ -240,13 +237,8 @@ fn run_parallel<F, Res>(grammars: Vec<GrammarConfiguration>, job: F) -> Vec<Resu
 
 enum FetchStatus {
     GitUpToDate,
-    GitUpdated {
-        grammar_id: String,
-        revision: String,
-    },
-    NonGit {
-        grammar_id: String,
-    },
+    GitUpdated { revision: String },
+    NonGit,
 }
 
 fn fetch_grammar(grammar: GrammarConfiguration) -> Result<FetchStatus> {
@@ -287,17 +279,12 @@ fn fetch_grammar(grammar: GrammarConfiguration) -> Result<FetchStatus> {
             )?;
             git(&grammar_dir, ["checkout", &revision])?;
 
-            Ok(FetchStatus::GitUpdated {
-                grammar_id: grammar.grammar_id,
-                revision,
-            })
+            Ok(FetchStatus::GitUpdated { revision })
         } else {
             Ok(FetchStatus::GitUpToDate)
         }
     } else {
-        Ok(FetchStatus::NonGit {
-            grammar_id: grammar.grammar_id,
-        })
+        Ok(FetchStatus::NonGit)
     }
 }
 
@@ -347,7 +334,7 @@ fn git<I, S>(repository_dir: &Path, args: I) -> Result<String>
 
 enum BuildStatus {
     AlreadyBuilt,
-    Built { grammar_id: String },
+    Built,
 }
 
 fn build_grammar(grammar: GrammarConfiguration, target: Option<&str>) -> Result<BuildStatus> {
@@ -533,9 +520,7 @@ fn build_tree_sitter_library(
         ));
     }
 
-    Ok(BuildStatus::Built {
-        grammar_id: grammar.grammar_id,
-    })
+    Ok(BuildStatus::Built)
 }
 
 fn needs_recompile(