Make exit code propagate

reid/src/ld.rs

@@ -104,3 +104,15 @@ fn find_objectfile(name: &str) -> String {
         .unwrap()
         .to_owned()
 }
+
+pub fn execute(path: &PathBuf) -> Option<i32> {
+    let output = Command::new(path.clone()).output().expect("Unable to execute {path}");
+
+    if !output.status.success() {
+        let code = output.status.code().unwrap_or(255);
+        log::error!("{path:?} exited with code {code}");
+        println!("{}", unsafe { String::from_utf8_unchecked(output.stderr) });
+    }
+
+    output.status.code()
+}

reid/src/main.rs

@@ -1,8 +1,12 @@
-use std::{fs, path::PathBuf};
+use std::{fs, path::PathBuf, process};
 
 use argh::FromArgs;
 use log::*;
-use reid::{compile_simple, ld::LDRunner, CustomIRs};
+use reid::{
+    compile_simple,
+    ld::{execute, LDRunner},
+    CustomIRs,
+};
 use reid_lib::compile::CompileOutput;
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -23,6 +27,7 @@ struct Options {
 #[argh(subcommand)]
 enum Command {
     Build(BuildOpts),
+    Run(RunOpts),
 }
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -36,6 +41,17 @@ struct BuildOpts {
     path: PathBuf,
 }
 
+#[derive(FromArgs, PartialEq, Debug)]
+/// Build and then execute the executable
+#[argh(subcommand, name = "run")]
+struct RunOpts {
+    #[argh(option, long = "lib", short = 'l')]
+    /// additional libraries to link against (with ld)
+    libraries: Vec<String>,
+    #[argh(positional)]
+    path: PathBuf,
+}
+
 fn main() {
     let options: Options = argh::from_env();
     let mut errlog = stderrlog::new();
@@ -45,12 +61,12 @@ fn main() {
     }
     errlog.init().unwrap();
 
-    match options.command {
-        Command::Build(build) => {
+    match &options.command {
+        Command::Build(BuildOpts { libraries, path }) | Command::Run(RunOpts { libraries, path }) => {
             let cpu = std::env::var("CPU").unwrap_or("generic".to_owned());
             let features = std::env::var("REIDFLAGS").unwrap_or("".to_owned());
 
-            let path = match build.path.canonicalize() {
+            let path = match path.canonicalize() {
                 Ok(path) => path,
                 Err(e) => {
                     error!("{e}");
@@ -64,6 +80,7 @@ fn main() {
             let llir_path = parent.with_extension("llir");
             let mir_path = parent.with_extension("mir");
             let asm_path = parent.with_extension("asm");
+            let out_path = object_path.with_extension("out");
 
             let before = std::time::SystemTime::now();
 
@@ -108,13 +125,25 @@ fn main() {
 
                     let linker = std::env::var("LD").unwrap_or("ld".to_owned());
                     let mut linker = LDRunner::from_command(&linker).with_library("c").with_library("m");
-                    for library in build.libraries {
+                    for library in libraries {
                         linker = linker.with_library(&library);
                     }
-                    linker.invoke(&object_path, &object_path.with_extension("out"));
+                    linker.invoke(&object_path, &out_path);
+                }
+                Err(e) => {
+                    log::error!("{e}");
+                    return;
                 }
-                Err(e) => panic!("{}", e),
             };
+
+            match &options.command {
+                Command::Build(_) => {}
+                Command::Run(_) => {
+                    if let Some(code) = execute(&out_path) {
+                        process::exit(code);
+                    }
+                }
+            }
         }
     }
 }