From 280e11a95eaf5268da762247208160573f093518 Mon Sep 17 00:00:00 2001
From: Klesti Selimaj <klesti.selimay@icloud.com>
Date: Tue, 2 Jun 2026 23:24:11 +0200
Subject: [PATCH] Bootstrapped builder

---
 crates/mist-api/src/builder.mist | 188 +++++++++++++++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 crates/mist-api/src/builder.mist

diff --git a/crates/mist-api/src/builder.mist b/crates/mist-api/src/builder.mist
new file mode 100644
index 0000000..90a9bd9
--- /dev/null
+++ b/crates/mist-api/src/builder.mist
@@ -0,0 +1,188 @@
+use <std::collections::HashMap>;
+use <std::env>;
+use <std::fs>;
+use <std::path::MAIN_SEPARATOR>;
+use <std::path::PathBuf>;
+use <std::process::Command>;
+use <std::process::Stdio>;
+use <cargo_metadata::CompilerMessage>;
+use <cargo_metadata::Message>;
+use <mist_parser::rev_mapper>;
+
+#[derive(Debug, Clone)]
+pub struct MistDiagnosticMessage {
+    pub String message,
+    pub PathBuf file_path,
+    pub String file_name,
+    pub usize line,
+    pub usize column,
+}
+
+#[derive(Debug, Clone)]
+pub enum MistDiagnostic {
+    Error[MistDiagnosticMessage],
+    Warning[MistDiagnosticMessage],
+    Rust[CompilerMessage],
+}
+
+pub bool build(Vec<String> mut args, PathBuf root) {
+    args.remove(0);
+    args.insert(1, "--message-format=json".to_string());
+
+    var is_root = root == env::current_dir().expect("Failed getting env");
+
+    var mut command = Command::new("cargo")
+        .args(args)
+        .stdout(Stdio::piped())
+        .stderr(Stdio::inherit())
+        .stdin(Stdio::inherit())
+        .spawn()
+        .expect("Failed to run cargo");
+
+    var mut reader = std::io::BufReader::new(command.stdout.take().expect("Failed to get reader"));
+
+    var mut diagnostics = Vec::new();
+
+    var mut mapping = HashMap::new();
+
+    var mist_src = format!(".mist{MAIN_SEPARATOR}src");
+
+    for (message : cargo_metadata::Message::parse_stream(&mut reader)) {
+        match (message) {
+            Ok[Message::CompilerMessage[msg]] => {
+                for (span : &msg.message.spans) {
+                    if (span.is_primary) {
+                        var rust_path = root.join(&span.file_name);
+
+                        var mist_file = span
+                            .file_name
+                            .replacen(&mist_src, "src", 1)
+                            .trim_end_matches(".rs")
+                            .to_string()
+                            + ".mist";
+
+                        var mist_path = root.join(&mist_file);
+
+                        if (!fs::exists(&mist_path).expect("Unable to check if mist file exists")) {
+                            diagnostics.push(MistDiagnostic::Rust(msg));
+                            break;
+                        }
+
+                        var map = mapping.entry(rust_path.clone()).or_insert_with(|| {
+                            rev_mapper::get_mapping(
+                                &fs::read_to_string(rust_path)
+                                    .expect("Failed to read file for mapping")
+                            )
+                        });
+
+                        var [_, rev_mapper::MistMap[line, column]] =
+                            rev_mapper::find_mapping(&map, &rev_mapper::RustMap(span.line_end, span.column_start))
+                                .expect("Unable to find mapping");
+
+                        var mist_msg = MistDiagnosticMessage {
+                            message: format!(
+                                "{}: {}",
+                                msg.message.message,
+                                span.label.clone().unwrap_or_default()
+                            ),
+                            file_name: if (is_root) {
+                                mist_file
+                            } else {
+                                mist_path.to_string_lossy().to_string()
+                            },
+                            file_path: mist_path,
+                            line: line,
+                            column: column
+                        };
+
+                        match (msg.message.level) {
+                            cargo_metadata::diagnostic::DiagnosticLevel::Error => {
+                                diagnostics.push(MistDiagnostic::Error(mist_msg))
+                            }
+
+                            cargo_metadata::diagnostic::DiagnosticLevel::Warning => {
+                                diagnostics.push(MistDiagnostic::Warning(mist_msg))
+                            }
+
+                            _ => {}
+                        }
+                    }
+                }
+            }
+
+            Ok[Message::BuildFinished[finish]] => {
+                print_diagnostics(&diagnostics);
+
+                var mut raw_reader = reader.into_inner();
+                var mut stdout = std::io::stdout();
+
+                std::io::copy(&mut raw_reader, &mut stdout)
+                    .map_err(|var v| v.to_string())
+                    .expect("(Mist) Failed to copy IO");
+
+                command.wait().unwrap();
+
+                return finish.success;
+            }
+
+            Ok[Message::TextLine[text]] => println!("{text}");
+            _ => {}
+        }
+    }
+
+    false
+}
+
+pub void print_diagnostics(Vec<MistDiagnostic>* diagnostics) {
+    var mut files = HashMap::new();
+
+    for (diag : diagnostics) {
+        match (diag) {
+            MistDiagnostic::Error[msg] => {
+                var line = get_line(&mut files, &msg);
+
+                println!(
+                    "\n{}:{}:{}\n \x1b[31mError\x1b[0m: {}\n\t{}",
+                    msg.file_name,
+                    msg.line,
+                    msg.column,
+                    msg.message,
+                    line.unwrap_or_default(),
+                )
+            }
+
+            MistDiagnostic::Warning[msg] => {
+                var line = get_line(&mut files, &msg);
+
+                println!(
+                    "\n{}:{}:{}\n \x1b[33mWarning\x1b[0m: {}\n\t{}",
+                    msg.file_name,
+                    msg.line,
+                    msg.column,
+                    msg.message,
+                    line.unwrap_or_default(),
+                )
+            }
+
+            MistDiagnostic::Rust[rs] => println!("{rs}");
+        }
+    }
+}
+
+pub Option<String> get_line(
+    HashMap<PathBuf, Vec<String>> mut* files,
+    MistDiagnosticMessage* msg,
+) {
+    var src_path = msg.file_path.clone();
+
+    var lines = files.entry(src_path.clone()).or_insert_with(|| {
+        fs::read_to_string(src_path)
+            .expect("Unable to read mist file")
+            .lines()
+            .into_iter()
+            .map(String::from)
+            .collect()
+    });
+
+    lines.get(msg.line - 1).map(|var v| v.trim().to_string())
+}