Cargo.lock

@@ -1923,6 +1923,7 @@ dependencies = [
  "prometeu-core",
  "serde",
  "serde_json",
+ "tempfile",
 ]
 
 [[package]]
@@ -2320,6 +2321,19 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "tempfile"
+version = "3.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "655da9c7eb6305c55742045d5a8d2037996d61d8de95806335c7c86ce0f82e9c"
+dependencies = [
+ "fastrand",
+ "getrandom",
+ "once_cell",
+ "rustix 1.1.3",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.4.1"

crates/prometeu-compiler/Cargo.toml

@@ -26,3 +26,6 @@ clap = { version = "4.5.54", features = ["derive"] }
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.149"
 anyhow = "1.0.100"
+
+[dev-dependencies]
+tempfile = "3.10.1"

crates/prometeu-compiler/src/common/config.rs

@@ -0,0 +1,43 @@
+use serde::{Deserialize, Serialize};
+use std::path::{Path, PathBuf};
+use anyhow::Result;
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct ProjectConfig {
+    pub script_fe: String,
+    pub entry: PathBuf,
+}
+
+impl ProjectConfig {
+    pub fn load(project_dir: &Path) -> Result<Self> {
+        let config_path = project_dir.join("prometeu.json");
+        let content = std::fs::read_to_string(config_path)?;
+        let config: ProjectConfig = serde_json::from_str(&content)?;
+        Ok(config)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::fs;
+    use tempfile::tempdir;
+
+    #[test]
+    fn test_load_valid_config() {
+        let dir = tempdir().unwrap();
+        let config_path = dir.path().join("prometeu.json");
+        fs::write(
+            config_path,
+            r#"{
+            "script_fe": "pbs",
+            "entry": "main.pbs"
+        }"#,
+        )
+        .unwrap();
+
+        let config = ProjectConfig::load(dir.path()).unwrap();
+        assert_eq!(config.script_fe, "pbs");
+        assert_eq!(config.entry, PathBuf::from("main.pbs"));
+    }
+}

crates/prometeu-compiler/src/common/mod.rs

@@ -2,3 +2,4 @@ pub mod diagnostics;
 pub mod spans;
 pub mod files;
 pub mod symbols;
+pub mod config;

crates/prometeu-compiler/src/compiler.rs

@@ -4,6 +4,7 @@
 //! It handles the transition between different compiler phases: Frontend -> IR -> Backend.
 
 use crate::backend;
+use crate::common::config::ProjectConfig;
 use crate::common::files::FileManager;
 use crate::common::symbols::Symbol;
 use crate::frontends::Frontend;
@@ -13,6 +14,7 @@ use std::path::Path;
 
 /// The result of a successful compilation process.
 /// It contains the final binary and the metadata needed for debugging.
+#[derive(Debug)]
 pub struct CompilationUnit {
     /// The raw binary data formatted as Prometeu ByteCode (PBC).
     /// This is what gets written to a `.pbc` file.
@@ -51,35 +53,87 @@ impl CompilationUnit {
 /// # Example
 /// ```no_run
 /// use std::path::Path;
-/// let entry = Path::new("src/main.ts");
-/// let unit = prometeu_compiler::compiler::compile(entry).expect("Failed to compile");
+/// let project_dir = Path::new(".");
+/// let unit = prometeu_compiler::compiler::compile(project_dir).expect("Failed to compile");
 /// unit.export(Path::new("build/program.pbc"), true, true).unwrap();
 /// ```
-pub fn compile(entry: &Path) -> Result<CompilationUnit> {
-    let mut file_manager = FileManager::new();
+pub fn compile(project_dir: &Path) -> Result<CompilationUnit> {
+    let config = ProjectConfig::load(project_dir)?;
+
+    // 1. Select Frontend
+    // The _frontend is responsible for parsing source code and producing the IR.
+    let _frontend: Box<dyn Frontend> = match config.script_fe.as_str() {
+        "pbs" => anyhow::bail!("Frontend 'pbs' not yet implemented"),
+        _ => anyhow::bail!("Invalid frontend: {}", config.script_fe),
+    };
     
-    // 1. Select Frontend (Currently only TS is supported)
-    // The frontend is responsible for parsing source code and producing the IR.
-    let frontend = /** ??? **/;
-    
-    // 2. Compile to IR (Intermediate Representation)
-    // This step abstracts away source-specific syntax (like TypeScript) into a
-    // generic set of instructions that the backend can understand.
-    let ir_module = frontend.compile_to_ir(entry, &mut file_manager)
-        .map_err(|bundle| anyhow::anyhow!("Compilation failed with {} errors", bundle.diagnostics.len()))?;
+    #[allow(unreachable_code, unused_variables, unused_mut)]
+    {
+        let entry = project_dir.join(&config.entry);
+        let mut file_manager = FileManager::new();
+
+        // 2. Compile to IR (Intermediate Representation)
+        // This step abstracts away source-specific syntax (like TypeScript) into a
+        // generic set of instructions that the backend can understand.
+        let ir_module = _frontend.compile_to_ir(&entry, &mut file_manager)
+            .map_err(|bundle| anyhow::anyhow!("Compilation failed with {} errors", bundle.diagnostics.len()))?;
+            
+        // 3. IR Validation
+        // Ensures the generated IR is sound and doesn't violate any VM constraints
+        // before we spend time generating bytecode.
+        ir::validate::validate_module(&ir_module)
+            .map_err(|bundle| anyhow::anyhow!("IR Validation failed: {:?}", bundle))?;
+            
+        // 4. Emit Bytecode
+        // The backend takes the validated IR and produces the final binary executable.
+        let result = backend::emit_module(&ir_module, &file_manager)?;
         
-    // 3. IR Validation
-    // Ensures the generated IR is sound and doesn't violate any VM constraints
-    // before we spend time generating bytecode.
-    ir::validate::validate_module(&ir_module)
-        .map_err(|bundle| anyhow::anyhow!("IR Validation failed: {:?}", bundle))?;
-        
-    // 4. Emit Bytecode
-    // The backend takes the validated IR and produces the final binary executable.
-    let result = backend::emit_module(&ir_module, &file_manager)?;
-    
-    Ok(CompilationUnit {
-        rom: result.rom,
-        symbols: result.symbols,
-    })
+        Ok(CompilationUnit {
+            rom: result.rom,
+            symbols: result.symbols,
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::fs;
+    use tempfile::tempdir;
+
+    #[test]
+    fn test_invalid_frontend() {
+        let dir = tempdir().unwrap();
+        let config_path = dir.path().join("prometeu.json");
+        fs::write(
+            config_path,
+            r#"{
+            "script_fe": "invalid",
+            "entry": "main.pbs"
+        }"#,
+        )
+        .unwrap();
+
+        let result = compile(dir.path());
+        assert!(result.is_err());
+        assert!(result.unwrap_err().to_string().contains("Invalid frontend: invalid"));
+    }
+
+    #[test]
+    fn test_frontend_pbs_not_implemented() {
+        let dir = tempdir().unwrap();
+        let config_path = dir.path().join("prometeu.json");
+        fs::write(
+            config_path,
+            r#"{
+            "script_fe": "pbs",
+            "entry": "main.pbs"
+        }"#,
+        )
+        .unwrap();
+
+        let result = compile(dir.path());
+        assert!(result.is_err());
+        assert!(result.unwrap_err().to_string().contains("Frontend 'pbs' not yet implemented"));
+    }
 }

crates/prometeu-compiler/src/lib.rs

@@ -96,12 +96,11 @@ pub fn run() -> Result<()> {
     match cli.command {
         Commands::Build {
             project_dir,
-            entry,
             out,
             emit_disasm,
             emit_symbols,
+            ..
         } => {
-            let entry = entry.unwrap_or_else(|| project_dir.join("src/main.ts"));
             let build_dir = project_dir.join("build");
             let out = out.unwrap_or_else(|| build_dir.join("program.pbc"));
 
@@ -110,18 +109,15 @@ pub fn run() -> Result<()> {
             }
 
             println!("Building project at {:?}", project_dir);
-            println!("Entry: {:?}", entry);
             println!("Output: {:?}", out);
 
-            let compilation_unit = compiler::compile(&entry)?;
+            let compilation_unit = compiler::compile(&project_dir)?;
             compilation_unit.export(&out, emit_disasm, emit_symbols)?;
         }
         Commands::Verify { project_dir } => {
-            let entry = project_dir.join("src/main.ts");
             println!("Verifying project at {:?}", project_dir);
-            println!("Entry: {:?}", entry);
 
-            compiler::compile(&entry)?;
+            compiler::compile(&project_dir)?;
             println!("Project is valid!");
         }
     }

crates/prometeu-compiler/tests/config_integration.rs

@@ -0,0 +1,36 @@
+use std::fs;
+use tempfile::tempdir;
+use prometeu_compiler::compiler;
+
+#[test]
+fn test_project_root_and_entry_resolution() {
+    let dir = tempdir().unwrap();
+    let project_dir = dir.path();
+    
+    // Create prometeu.json
+    fs::write(
+        project_dir.join("prometeu.json"),
+        r#"{
+            "script_fe": "pbs",
+            "entry": "src/main.pbs"
+        }"#,
+    ).unwrap();
+    
+    // Create src directory and main.pbs
+    fs::create_dir(project_dir.join("src")).unwrap();
+    fs::write(project_dir.join("src/main.pbs"), "").unwrap();
+    
+    // Call compile
+    let result = compiler::compile(project_dir);
+    
+    // It should fail with "Frontend 'pbs' not yet implemented" 
+    // but ONLY after successfully loading the config and resolving the entry.
+    
+    match result {
+        Err(e) => {
+            let msg = e.to_string();
+            assert!(msg.contains("Frontend 'pbs' not yet implemented"), "Unexpected error: {}", msg);
+        }
+        Ok(_) => panic!("Should have failed as pbs is not implemented yet"),
+    }
+}