Basic groundwork for viperid, a fantasy console

crates/editor/.gitignore

@@ -0,0 +1 @@
+target/

crates/editor/Cargo.lock

@@ -0,0 +1,24 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
+version = "1.0.82"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f538837af36e6f6a9be0faa67f9a314f8119e4e4b5867c6ab40ed60360142519"
+
+[[package]]
+name = "editor"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "shared",
+]
+
+[[package]]
+name = "shared"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+]

crates/editor/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "editor"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.82"
+player = { path = "../player" } 
+viperid = { path = "../.." }

crates/editor/src/go_builder.rs

@@ -0,0 +1,80 @@
+use std::{fs::File, io::Read, path::{Path, PathBuf}, process::Command};
+
+use viperid::VResult;
+
+pub struct GoBuilder {
+    project_directory: PathBuf,
+    entry_point: PathBuf
+}
+
+impl GoBuilder {
+    pub fn new(project_directory: &Path) -> VResult<GoBuilder> {
+        // make sure Go is a supported version
+        let output = Command::new("go").arg("version").output()?;
+
+        if !output.status.success() {
+            anyhow::bail!("Go is not installed or did not start: {:?}", output.status)
+        }
+
+        // TODO: Support more Go versions
+        let text = output.stdout;
+        if !text.starts_with(b"go version go1.21") {
+            anyhow::bail!("unsupported Go version (must be 1.21): {}", String::from_utf8_lossy(&text).trim())
+        }
+
+        // make sure the project is really here
+        if !project_directory.exists() {
+            anyhow::bail!("project directory must exist: {}", project_directory.to_string_lossy())
+        }
+
+        let entry_point = project_directory.join("main.go");
+        if !entry_point.exists() {
+            anyhow::bail!("entry point must exist: {}", entry_point.to_string_lossy())
+        }
+
+        // OK, we should be able to do things with Go without any errors
+        Ok(GoBuilder {
+            project_directory: PathBuf::from(project_directory),
+            entry_point
+        })
+    }
+
+    pub fn build(&self) -> VResult<Vec<u8>> {
+        // NOTE: We've checked that the project directory exists
+        if !self.project_directory.exists() {
+            anyhow::bail!(
+                "project directory disappeared: {}", 
+                self.project_directory.to_string_lossy()
+            );
+        }
+        if !self.entry_point.exists() {
+            anyhow::bail!(
+                "entry point disappeared: {}", 
+                self.entry_point.to_string_lossy()
+            );
+        }
+
+        let project_directory = &self.project_directory;
+        let entry_point = &self.entry_point;
+        let build_directory = project_directory.join("build");
+        let wasm_name = build_directory.join("game.wasm");
+
+        let mut child = Command::new("go")
+            .args(["build", "-o"]).arg(&wasm_name)
+            .env("GOOS", "wasip1")
+            .env("GOARCH", "wasm")
+            .arg("-trimpath")
+            .arg(entry_point)
+            .spawn()?;
+        let status = child.wait()?;
+        if !status.success() {
+            anyhow::bail!("go failed");
+        }
+
+        let mut buf = vec![];
+        File::open(wasm_name)?.read_to_end(&mut buf)?;
+        Ok(buf)
+    }
+
+
+}

crates/editor/src/main.rs

@@ -0,0 +1,14 @@
+use std::path::PathBuf;
+
+use viperid::VResult;
+
+use crate::go_builder::GoBuilder;
+
+mod go_builder;
+
+fn main() -> VResult<()> {
+    let builder = GoBuilder::new(&PathBuf::from("example_project"))?;
+    let wasm = builder.build()?;
+    player::run_entry_point(&wasm)?;
+    Ok(())
+}