Report errors in the CLI

Cargo.lock

@@ -870,6 +870,7 @@ dependencies = [
  "roc_parse",
  "roc_problem",
  "roc_region",
+ "roc_reporting",
  "roc_solve",
  "roc_types",
  "roc_unify",

cli/Cargo.toml

@@ -32,6 +32,7 @@ roc_unify = { path = "../compiler/unify" }
 roc_solve = { path = "../compiler/solve" }
 roc_mono = { path = "../compiler/mono" }
 roc_gen = { path = "../compiler/gen", version = "0.1.0" }
+roc_reporting = { path = "../compiler/reporting", version = "0.1.0" }
 im    = "14" # im and im-rc should always have the same version!
 im-rc = "14" # im and im-rc should always have the same version!
 bumpalo = { version = "3.2", features = ["collections"] }

cli/src/main.rs

@@ -1,4 +1,5 @@
 extern crate roc_gen;
+extern crate roc_reporting;
 
 use crate::helpers::{infer_expr, uniq_expr_with};
 use bumpalo::Bump;
@@ -22,7 +23,7 @@ use inkwell::targets::{
 use std::fs::File;
 use std::io;
 use std::io::prelude::*;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use target_lexicon::{Architecture, OperatingSystem, Triple, Vendor};
 
 pub mod helpers;
@@ -40,7 +41,12 @@ fn main() -> io::Result<()> {
 
             let dest_filename = Path::new(filename).with_extension("o");
 
-            gen(contents.as_str(), Triple::host(), &dest_filename);
+            gen(
+                Path::new(filename).to_path_buf(),
+                contents.as_str(),
+                Triple::host(),
+                &dest_filename,
+            );
 
             let end_time = now.elapsed().unwrap();
 
@@ -56,15 +62,46 @@ fn main() -> io::Result<()> {
     }
 }
 
-fn gen(src: &str, target: Triple, dest_filename: &Path) {
+fn gen(filename: PathBuf, src: &str, target: Triple, dest_filename: &Path) {
+    use roc_reporting::report::{can_problem, DEFAULT_PALETTE};
+    use roc_reporting::type_error::type_problem;
+
     // Build the expr
     let arena = Bump::new();
 
-    let (loc_expr, _output, _problems, subs, var, constraint, home, interns) =
+    let (loc_expr, _output, can_problems, subs, var, constraint, home, interns) =
         uniq_expr_with(&arena, src, &ImMap::default());
 
-    let mut unify_problems = Vec::new();
-    let (content, mut subs) = infer_expr(subs, &mut unify_problems, &constraint, var);
+    let mut type_problems = Vec::new();
+    let (content, mut subs) = infer_expr(subs, &mut type_problems, &constraint, var);
+
+    let src_lines: Vec<&str> = src.split('\n').collect();
+    let palette = DEFAULT_PALETTE;
+
+    // Report parsing and canonicalization problems
+    for problem in can_problems.into_iter() {
+        let report = can_problem(filename.clone(), problem);
+        let mut buf = String::new();
+
+        report
+            .text
+            .render_color_terminal(&mut buf, &mut subs, home, &src_lines, &interns, &palette);
+
+        println!("\n{}\n", buf);
+    }
+
+    for problem in type_problems.into_iter() {
+        let report = type_problem(filename.clone(), problem);
+        let mut buf = String::new();
+
+        report
+            .text
+            .render_color_terminal(&mut buf, &mut subs, home, &src_lines, &interns, &palette);
+
+        println!("\n{}\n", buf);
+    }
+
+    // Generate the binary
 
     let context = Context::create();
     let module = module_from_builtins(&context, "app");
@@ -178,7 +215,7 @@ fn gen(src: &str, target: Triple, dest_filename: &Path) {
 
     // Verify the module
     if let Err(errors) = env.module.verify() {
-        panic!("Errors defining module: {:?}", errors);
+        panic!("😱 LLVM errors when defining module: {:?}", errors);
     }
 
     // Uncomment this to see the module's optimized LLVM instruction output:

compiler/reporting/src/report.rs

@@ -30,7 +30,7 @@ pub struct Palette<'a> {
     pub binop: &'a str,
 }
 
-pub const TEST_PALETTE: Palette = Palette {
+pub const DEFAULT_PALETTE: Palette = Palette {
     primary: WHITE_CODE,
     code_block: WHITE_CODE,
     variable: BLUE_CODE,

compiler/reporting/tests/test_reporting.rs

@@ -13,8 +13,8 @@ mod test_reporting {
     use roc_module::symbol::{Interns, ModuleId};
     use roc_reporting::report::{
         can_problem, em_text, plain_text, url, Report, ReportText, BLUE_CODE, BOLD_CODE, CYAN_CODE,
-        GREEN_CODE, MAGENTA_CODE, RED_CODE, RESET_CODE, TEST_PALETTE, UNDERLINE_CODE, WHITE_CODE,
-        YELLOW_CODE,
+        DEFAULT_PALETTE, GREEN_CODE, MAGENTA_CODE, RED_CODE, RESET_CODE, UNDERLINE_CODE,
+        WHITE_CODE, YELLOW_CODE,
     };
     use roc_reporting::type_error::type_problem;
     use roc_types::pretty_print::name_all_type_vars;
@@ -147,7 +147,7 @@ mod test_reporting {
             home,
             &src_lines,
             &interns,
-            &TEST_PALETTE,
+            &DEFAULT_PALETTE,
         );
 
         assert_eq!(human_readable(&buf), expected_rendering);
@@ -492,7 +492,7 @@ mod test_reporting {
             home,
             &src_lines,
             &interns,
-            &TEST_PALETTE,
+            &DEFAULT_PALETTE,
         );
 
         assert_eq!(human_readable(&buf), "<blue>activityIndicatorLarge<reset>");
@@ -523,7 +523,7 @@ mod test_reporting {
                 home,
                 &src_lines,
                 &interns,
-                &TEST_PALETTE,
+                &DEFAULT_PALETTE,
             );
 
         assert_eq!(human_readable(&buf), "<green>Util.Int<reset>");