Improved xtask

xtask/Cargo.toml

@@ -8,5 +8,6 @@ publish = false
 
 [dependencies]
 anyhow = "1"
-pico-args = "0.3"
 smoljson = "0.1"
+xshell = "0.1"
+xflags = "0.1"

xtask/src/bindgen.rs

@@ -1,17 +1,12 @@
+use crate::flags::Bindgen;
 use anyhow::{anyhow, Context, Result};
 use std::path::{Path, PathBuf};
 
-pub struct GenBindings {
-    pub bindings_path: Option<String>,
-    pub output_path: Option<String>,
-    pub wasm_import_name: Option<String>,
-}
-
-impl GenBindings {
+impl Bindgen {
     pub fn run(self) -> Result<()> {
         let root = crate::project_root();
         let bindings = self
-            .bindings_path
+            .cimgui_path
             .map(PathBuf::from)
             .unwrap_or_else(|| root.join("imgui-sys/third-party"));
 
@@ -24,6 +19,7 @@ impl GenBindings {
             .wasm_import_name
             .or_else(|| std::env::var("IMGUI_RS_WASM_IMPORT_NAME").ok())
             .unwrap_or_else(|| "imgui-sys-v0".to_string());
+
         let types = get_types(&bindings.join("structs_and_enums.json"))?;
         let funcs = get_definitions(&bindings.join("definitions.json"))?;
         let header = bindings.join("cimgui.h");
@@ -147,15 +143,3 @@ fn generate_binding_file(
 
     Ok(())
 }
-
-// impl Deref for CountingCommand {
-//     type Target = std::process::Command;
-//     fn deref(&self) -> &Self::Target {
-//         &self.c
-//     }
-// }
-// impl std::ops::DerefMut for CountingCommand {
-//     fn deref_mut(&mut self) -> &mut Self::Target {
-//         &mut self.c
-//     }
-// }

xtask/src/flags.rs

@@ -0,0 +1,88 @@
+//! xflags is a bit jank still, but pretty nice compared to pico_args, and
+//! compiles a billion times faster than clap/structopt.
+//!
+//! When you modify stuff in the args_parser block, you'll get compile errors.
+//! to fix these:
+//! 1. run `env XFLAGS_DUMP= cargo build` in the shell.
+//! 2. this will error, but should spit out a block of code delimited by
+//!    "generated start" and "generated end" comments. (if not, you probably
+//!    have an error message about your usage of the macro, fix and retry)
+//! 3. Copy the generated code, and replace the bottom of this file with it.
+//!
+//! Also, rust-analyzer says this file has a "unresolved macro call". I don't
+//! know why, just ignore it — it goes away if you close this file.
+
+#![allow(dead_code)]
+
+xflags::args_parser! {
+    /// Run custom build command.
+    cmd xtask {
+        optional -v, --verbose
+
+        default cmd help {
+            /// Print help information.
+            optional -h, --help
+        }
+        /// Run lints the way we'd run it in CI
+        cmd lint {}
+        /// Run tests the way we'd run them in CI
+        cmd test {}
+
+        /// produce bindings using bindgen (must have bindgen installed)
+        cmd bindgen {
+            optional --cimgui-path cimgui_path: String
+            optional --output-path output_path: String
+            optional --wasm-import-name wasm_import_name: String
+        }
+    }
+}
+
+// generated start
+// The following code is generated by `xflags` macro.
+// Run `env XFLAGS_DUMP= cargo build` to regenerate.
+#[derive(Debug)]
+pub struct Xtask {
+    pub verbose: bool,
+    pub subcommand: XtaskCmd,
+}
+
+#[derive(Debug)]
+pub enum XtaskCmd {
+    Help(Help),
+    Lint(Lint),
+    Test(Test),
+    Bindgen(Bindgen),
+}
+
+#[derive(Debug)]
+pub struct Help {
+    pub help: bool,
+}
+
+#[derive(Debug)]
+pub struct Lint {}
+
+#[derive(Debug)]
+pub struct Test {}
+
+#[derive(Debug)]
+pub struct Bindgen {
+    pub cimgui_path: Option<String>,
+    pub output_path: Option<String>,
+    pub wasm_import_name: Option<String>,
+}
+
+impl Xtask {
+    pub const HELP: &'static str = Self::_HELP;
+
+    pub fn from_env() -> xflags::Result<Self> {
+        let mut p = xflags::rt::Parser::new_from_env();
+        Self::_parse(&mut p)
+    }
+
+    pub fn from_vec(args: Vec<std::ffi::OsString>) -> xflags::Result<Self> {
+        let mut p = xflags::rt::Parser::new(args);
+        Self::_parse(&mut p)
+    }
+}
+// generated end

xtask/src/lib.rs

@@ -1,30 +0,0 @@
-use std::{
-    env,
-    path::{Path, PathBuf},
-};
-
-pub mod bindgen;
-
-pub fn project_root() -> PathBuf {
-    Path::new(
-        &env::var("CARGO_MANIFEST_DIR").unwrap_or_else(|_| env!("CARGO_MANIFEST_DIR").to_owned()),
-    )
-    .ancestors()
-    .nth(1)
-    .unwrap()
-    .to_path_buf()
-}
-
-pub fn pushd(p: impl AsRef<Path>) -> std::io::Result<Pushd> {
-    let cwd = std::env::current_dir()?;
-    std::env::set_current_dir(p.as_ref())?;
-    Ok(Pushd(cwd))
-}
-pub struct Pushd(PathBuf);
-impl Drop for Pushd {
-    fn drop(&mut self) {
-        if let Err(e) = std::env::set_current_dir(&self.0) {
-            eprintln!("warning: popd failed: {:?}", e);
-        }
-    }
-}

xtask/src/main.rs

@@ -1,7 +1,9 @@
+mod bindgen;
+mod flags;
+
 use anyhow::Result;
-use pico_args::Arguments;
-use xtask::bindgen::GenBindings;
-use xtask::{project_root, pushd};
+use flags::XtaskCmd;
+use std::path::{Path, PathBuf};
 
 fn main() {
     if let Err(e) = try_main() {
@@ -13,47 +15,59 @@ fn main() {
     }
 }
 
-const HELP: &str = "\
-cargo xtask
-Run custom build command.
-
-USAGE:
-    cargo xtask <SUBCOMMAND>
-
-SUBCOMMANDS:
-    bindgen - produce bindings using bindgen \
-        must have bindgen installed, may require unix \
-        as we pass `bindgen` very many CLI args
-TODO:
-    run - run or list examples
-    lint-all - run clippy as we would in CI
-    test-all - run the tests we'd run in CI
-";
-
 fn try_main() -> Result<()> {
-    let _g = pushd(project_root())?;
-
-    let mut args = Arguments::from_env();
-    let subcommand = args.subcommand()?.unwrap_or_default();
-
-    match subcommand.as_str() {
-        "bindgen" => {
-            // none of these are required.
-            let cmd = GenBindings {
-                // defaults to <project>/imgui-sys/third-party
-                bindings_path: args.opt_value_from_str("--cimgui-dir")?,
-                // defaults to <project>/imgui-sys/src
-                output_path: args.opt_value_from_str("--output-dir")?,
-                // defaults to "imgui-sys-v0", but can be set in
-                // env("IMGUI_RS_WASM_IMPORT_NAME")
-                wasm_import_name: args.opt_value_from_str("--wasm-import-name")?,
-            };
-            args.finish()?;
-            cmd.run()?;
-        }
-        _ => {
-            eprintln!("{}", HELP);
-        }
+    let root = project_root();
+    let _d = xshell::pushd(&root)?;
+    let flags = flags::Xtask::from_env()?;
+    if flags.verbose {
+        VERBOSE.store(true, std::sync::atomic::Ordering::Relaxed);
+    }
+    match flags.subcommand {
+        XtaskCmd::Help(_) => eprintln!("{}", flags::Xtask::HELP),
+        XtaskCmd::Lint(_) => lint_all()?,
+        XtaskCmd::Test(_) => test_all()?,
+        XtaskCmd::Bindgen(cmd) => cmd.run()?,
     }
     Ok(())
 }
+
+fn lint_all() -> Result<()> {
+    xshell::cmd!("cargo clippy --workspace --all-targets").run()?;
+    xshell::cmd!(
+        "cargo clippy --manifest-path imgui-winit-support/Cargo.toml --all-features --all-targets"
+    )
+    .run()?;
+    let winits = &["winit-19", "winit-20", "winit-22", "winit-23", "winit-24"];
+    for &winit in winits {
+        xshell::cmd!("cargo clippy --manifest-path imgui-winit-support/Cargo.toml --no-default-features --features {winit} --all-targets").run()?;
+    }
+    xshell::cmd!("cargo fmt --all -- --check").run()?;
+    Ok(())
+}
+
+fn test_all() -> Result<()> {
+    xshell::cmd!("cargo test --workspace --all-targets").run()?;
+    xshell::cmd!("cargo test --workspace --doc").run()?;
+    let winits = &["winit-19", "winit-20", "winit-22", "winit-23", "winit-24"];
+    for &winit in winits {
+        xshell::cmd!("cargo test --manifest-path imgui-winit-support/Cargo.toml --no-default-features --features {winit} --all-targets").run()?;
+    }
+    xshell::cmd!("cargo test -p imgui --release -- --ignored").run()?;
+    Ok(())
+}
+
+static VERBOSE: std::sync::atomic::AtomicBool = std::sync::atomic::AtomicBool::new(false);
+pub fn verbose() -> bool {
+    VERBOSE.load(std::sync::atomic::Ordering::Relaxed)
+}
+
+pub fn project_root() -> PathBuf {
+    Path::new(
+        &std::env::var("CARGO_MANIFEST_DIR")
+            .unwrap_or_else(|_| env!("CARGO_MANIFEST_DIR").to_owned()),
+    )
+    .ancestors()
+    .nth(1)
+    .unwrap()
+    .to_path_buf()
+}