Add environment variable parsing support and implement CI fixes

README.md

@@ -17,3 +17,11 @@ npx vale
 ## Why
 
 Because the ones who know, know.
+
+## Advanced
+
+If you need to use a different binary than the pre-installed one (ie: the package doesn't support your system), you can specify a custom one like so:
+
+```bash
+VALE_BIN="/path/to/vale" npx vale
+```

src/vale.ts

@@ -1,18 +1,42 @@
 #!/usr/bin/env node
 import { spawnSync } from "node:child_process";
-import { outputBin } from "./shared";
 import { existsSync } from "fs-extra";
-if (existsSync(outputBin)) {
-  const result = spawnSync(outputBin, process.argv.slice(2), {
-    stdio: "inherit",
-  });
-  if (result.signal) {
-    console.error(`Process failed with signal: ${result.signal}`);
+import { outputBin } from "./shared";
+
+function resolveBin(): string {
+  const { VALE_BIN } = process.env;
+
+  if (VALE_BIN) {
+    if (existsSync(VALE_BIN)) {
+      return VALE_BIN;
+    }
+    console.error(
+      `VALE_BIN variable was specified but the path could not be found. Tried binary: ${VALE_BIN}`,
+    );
+    process.exit(1)
   }
-  if (result.error) {
-    console.error(`Failed to run Vale, process exited with error: ${result.error.message}`)
+
+  if (!existsSync(outputBin)) {
+    console.error("Missing Vale binary. Did you run the postinstall?");
+    process.exit(1);
   }
-  process.exit(result.status ?? 1);
+
+  return outputBin;
+}
+
+const bin = resolveBin();
+
+const result = spawnSync(bin, process.argv.slice(2), {
+  stdio: "inherit",
+});
+
+if (result.signal) {
+  console.error(`Process failed with signal: ${result.signal}`);
+}
+if (result.error) {
+  console.error(
+    `Failed to run Vale, process exited with error: ${result.error.message}`,
+  );
 }
-console.error("Missing Vale binary. Did you run the postinstall?");
-process.exit(1);
+
+process.exit(result.status ?? 1);