Implemented do ra_check command for enabling/disabling rust-analyzer check.

.vscode/tasks.json

@@ -62,6 +62,16 @@
 			"problemMatcher": [
 				"$rustc"
 			]
+		},
+		{
+			"label": "do ra_check",
+			"type": "shell",
+			"command": "cargo do ra_check",
+			"presentation": {
+				"reveal": "never",
+				"clear": true
+			},
+			"problemMatcher": []
 		}
 	],
 	"inputs": [

TODO/__current.md

@@ -8,8 +8,4 @@
    the event can be coalesced?
 * Timer and resize updates are causing problems.
 * Slow frame upload (2ms for 2mb)?
-* Crash respawn deadlocking.
-
-# DO
-
-* Implement `rust_analyzer_check` cancellation.
+* Crash respawn deadlocking.

tools/do-tasks/build.rs

@@ -18,9 +18,8 @@ fn main() {
     // the offset of the first '[' character in the comment block.
     let mut details_arg_offset = 0;
     for line in rs.lines() {
-        if line.starts_with("// do ") {
+        if let Some(task_line) = line.strip_prefix("// do ") {
             expect_details = true;
-            let task_line = &line["// do ".len()..];
             let (names, options) = parse_task_line(task_line);
             let mut names = names.into_iter();
 

tools/do-tasks/src/main.rs

@@ -7,6 +7,7 @@ fn main() {
     let (task, args) = args();
 
     match task {
+        "ra_check" => ra_check(args),
         "rust_analyzer_check" => rust_analyzer_check(args),
         "fmt" | "f" => fmt(args),
         "test" | "t" => test(args),
@@ -181,7 +182,6 @@ fn test(mut args: Vec<&str>) {
         if all_patterns.iter().any(|a| build_tests.contains(a)) {
             // all build tests.
             cmd_env("cargo", &build_tests_args, &args, &[("TRYBUILD", overwrite)]);
-            return;
         } else {
             // specific test files.
             let mut args = build_tests_args;
@@ -546,8 +546,43 @@ fn rust_analyzer_run(args: Vec<&str>) {
 }
 
 fn rust_analyzer_check(mut args: Vec<&str>) {
-    args.push("--message-format=json");
-    check(args);
+    if !settings_path().join(".rust_analyzer_disabled").exists() {
+        args.push("--message-format=json");
+        check(args);
+    }
+}
+
+// do ra_check [--on,--off]
+//    Enables or disables rust-analyzer check.
+// USAGE:
+//    ra_check --on
+//        Enables rust-analyzer check.
+//    ra_check --off
+//        Disables rust-analyzer check.
+//    ra_check
+//        Toggles rust-analyzer check.
+fn ra_check(mut args: Vec<&str>) {
+    let path = settings_path().join(".rust_analyzer_disabled");
+
+    let enable = if take_flag(&mut args, &["--on"]) {
+        true
+    } else if take_flag(&mut args, &["--off"]) {
+        false
+    } else {
+        path.exists()
+    };
+
+    if enable {
+        if let Err(e) = std::fs::remove_file(path) {
+            if e.kind() != std::io::ErrorKind::NotFound {
+                panic!("{:?}", e)
+            }
+        }
+        println("rust-analyzer check is enabled");
+    } else {
+        let _ = std::fs::File::create(path).unwrap();
+        println("rust-analyzer check is disabled");
+    }
 }
 
 // do help, --help [task]

tools/do-tasks/src/tests.rs

@@ -11,7 +11,7 @@ pub fn version_in_sync() {
     let check_file = |path| {
         let file = read_to_string(path).unwrap();
         let caps = rgx.captures(&file).unwrap_or_else(|| panic!("expected usage help in `{}`", path));
-        if caps.get(1).map(|c| c.as_str()).unwrap_or_default() != &version {
+        if caps.get(1).map(|c| c.as_str()).unwrap_or_default() != version {
             error(format_args!(
                 "usage example is outdated in `{}`\n   expected `zero-ui = \"{}\"'`\n   found    `{}`",
                 path,

tools/do-tasks/src/util.rs

@@ -1,6 +1,7 @@
 use std::env;
 use std::format_args as f;
 use std::io::Write;
+use std::path::PathBuf;
 use std::process::{self, Command, Stdio};
 
 // Command line to run `do`
@@ -30,7 +31,7 @@ fn cmd_impl(cmd: &str, default_args: &[&str], user_args: &[&str], envs: &[(&str,
 
     let mut cmd = Command::new(cmd);
     cmd.args(&args[..]);
-    cmd.envs(envs.iter().filter(|t| !t.0.is_empty() && !t.1.is_empty()).map(|&t| t));
+    cmd.envs(envs.iter().filter(|t| !t.0.is_empty() && !t.1.is_empty()).copied());
 
     for (remove, _) in envs.iter().filter(|t| !t.0.is_empty() && t.1.is_empty()) {
         cmd.env_remove(remove);
@@ -372,3 +373,7 @@ fn color(color: &str) -> &str {
     }
 }
 static mut ANSI_ENABLED: bool = false;
+
+pub fn settings_path() -> PathBuf {
+    std::env::current_exe().unwrap().parent().unwrap().to_owned()
+}