Use @actions-rs/core for cargo/cross execution.

Add problem matcher for cargo output

src/main.ts

@@ -1,79 +1,16 @@
-const os = require('os');
-const process = require('process');
+const path = require('path');
 
 import * as core from '@actions/core';
-import * as exec from '@actions/exec';
-import * as io from '@actions/io';
 
 import * as input from './input';
+import {Cargo, Cross} from '@actions-rs/core';
 
-const CROSS_REV: string = '69b8da7da287055127812c9e4b071756c2b98545';
-
-async function getCargo(): Promise<string> {
-    try {
-        return await io.which('cargo', true);
-    } catch (error) {
-        core.info('cargo is not installed by default for some virtual environments, \
-see https://help.github.com/en/articles/software-in-virtual-environments-for-github-actions');
-        core.info('To install it, use this action: https://github.com/actions-rs/toolchain');
-
-        throw error;
-    }
-}
-
-async function getCross(cargoPath: string): Promise<string> {
-    try {
-        return await io.which('cross', true);
-    } catch (error) {
-        core.debug('Unable to find cross, installing it now');
-    }
-
-    // Somewhat new Rust is required to compile `cross`
-    // (TODO: Not sure what version exactly, should clarify)
-    // but if some action will set an override toolchain before this action called
-    // (ex. `@actions-rs/toolchain` with `toolchain: 1.31.0`)
-    // `cross` compilation will fail.
-    //
-    // In order to skip this problem and install `cross` globally
-    // using the pre-installed system Rust,
-    // we are going to jump to the tmpdir (skipping directory override that way)
-    // install `cross` from there and then jump back.
-
-    const cwd = process.cwd();
-    process.chdir(os.tmpdir());
-
-    try {
-        core.startGroup('Install cross');
-        core.warning('Git version of cross will be installed, \
-see https://github.com/actions-rs/cargo/issues/1');
-        await exec.exec(cargoPath, [
-            'install',
-            '--rev',
-            CROSS_REV,
-            '--git',
-            'https://github.com/rust-embedded/cross.git'
-        ]);
-    } catch (error) {
-        throw error;
-    } finally {
-        // It is important to chdir back!
-        process.chdir(cwd);
-        core.endGroup();
-    }
-
-    // Expecting it to be in PATH already
-    return 'cross';
-}
-
-async function run(): Promise<void> {
-    const actionInput = input.parse();
-    const cargo = await getCargo();
-
+export async function run(actionInput: input.Input): Promise<void> {
     let program;
     if (actionInput.useCross) {
-        program = await getCross(cargo);
+        program = await Cross.getOrInstall();
     } else {
-        program = cargo;
+        program = await Cargo.get();
     }
 
     let args: string[] = [];
@@ -83,12 +20,17 @@ async function run(): Promise<void> {
     args.push(actionInput.command);
     args = args.concat(actionInput.args);
 
-    await exec.exec(program, args);
+    await program.call(args);
 }
 
 async function main(): Promise<void> {
+    const matchersPath = path.join(__dirname, '.matchers');
+    console.log(`##[add-matcher]${path.join(matchersPath, 'rust.json')}`);
+
+    const actionInput = input.get();
+
     try {
-        await run();
+        await run(actionInput);
     } catch (error) {
         core.setFailed(error.message);
     }