From bfeb0cd211653016015407e93a31284efeb75be9 Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Wed, 15 Sep 2021 03:35:19 -0500
Subject: [PATCH] feat: add function for checking the version of a binary

---
 src/utils/setup/version.ts | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/src/utils/setup/version.ts b/src/utils/setup/version.ts
index bb9943ff..112cfe76 100644
--- a/src/utils/setup/version.ts
+++ b/src/utils/setup/version.ts
@@ -1,4 +1,6 @@
 import { isValidUrl } from "../http/validate_url"
+import semverCompare from "semver/functions/compare"
+import { getExecOutput } from "@actions/exec"
 
 /**
  * Gets the specific versions supported by this action compatible with the supplied (specific or minimum) version in
@@ -48,3 +50,33 @@ export async function getSpecificVersionAndUrl(
 
   throw new Error(`Unsupported target! (platform='${platform}', version='${version}')`)
 }
+
+export const versionRegex = /v(\d\S*)\s/
+
+/** Get the version of a binary */
+export async function getBinVersion(file: string) {
+  try {
+    const { stderr, stdout } = await getExecOutput(file, ["--version"])
+    const version = stdout.match(versionRegex)?.[1] ?? stderr.match(versionRegex)?.[1]
+    return version
+  } catch (e) {
+    console.error(e)
+    return undefined
+  }
+}
+
+/** Check if the given bin is up to date against the target version */
+export async function isBinUptoDate(givenFile: string, targetVersion: string) {
+  const givenVersion = await getBinVersion(givenFile)
+  if (
+    typeof givenVersion === "string" &&
+    typeof targetVersion === "string" &&
+    givenVersion !== "" &&
+    targetVersion !== ""
+  ) {
+    return semverCompare(givenVersion, targetVersion) !== -1
+  } else {
+    // assume given version is old
+    return false
+  }
+}