chore: add ensure golanglint version

zx/ensure_golanglint_version.mjs

@@ -0,0 +1,35 @@
+#!/usr/bin/env zx
+
+$.verbose = false;
+
+async function getGoVersion() {
+    const goVersionProcess = await $`go version`;
+    const re = /go version go(.*) /
+    return re.exec(goVersionProcess.stdout)[1]
+}
+
+try {
+
+    let gitRoot = await $`git rev-parse --show-toplevel`;
+    gitRoot = gitRoot.stdout.trim();
+    const lintPath = `${gitRoot}/.github/workflows/golangci.yml`;
+    const catOutput = await $`cat ${lintPath}`;
+    const contents = catOutput.stdout;
+
+    let re = /version:\sv(.*)/
+    const targetVersion = re.exec(contents)[1]
+
+    let currentVersion = await $`golangci-lint --version`
+    re = /golangci-lint has version (.*) built.*/
+    currentVersion = re.exec(currentVersion.stdout)[1]
+
+    let goVersion = await getGoVersion()
+    goVersion = goVersion.substring(0, 4); // strip off the patch version
+    if (currentVersion !== targetVersion) {
+        await $`curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b /Users/chatton/.gvm/pkgsets/go${goVersion}/global/bin v${targetVersion}`
+        console.log("updated to version " + targetVersion);
+    }
+
+} catch (e) {
+    await $`exit 0`;
+}