Merge pull request #879 from ocaml/fix-darcs

Fix darcs installation failure on latest Ubuntu image

Author: smorimoto

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0),
 
 ## [unreleased]
 
+### Fixed
+
+- Fix darcs installation failure on latest Ubuntu image.
+
 ## [3.0.9]
 
 ### Changed

dist/index.js

@@ -1,22 +1,39 @@
 import * as process from "node:process";
-import { exec } from "@actions/exec";
+import { exec, getExecOutput } from "@actions/exec";
 import { PLATFORM } from "./constants.js";
 
+async function checkInstallability(packageName: string) {
+  const output = await getExecOutput("sudo", [
+    "apt-cache",
+    "search",
+    "--names-only",
+    `'^${packageName}$'`,
+  ]);
+  return output.stdout.length !== 0;
+}
+
 export async function installUnixSystemPackages() {
   const isGitHubRunner = process.env.GITHUB_ACTIONS === "true";
   if (isGitHubRunner) {
     if (PLATFORM === "linux") {
+      const darcs = await (async () => {
+        const installability = await checkInstallability("darcs");
+        if (installability) {
+          return ["darcs"];
+        }
+        return [];
+      })();
       await exec("sudo", [
         "apt-get",
         "--yes",
         "install",
         "bubblewrap",
-        "darcs",
         "g++-multilib",
         "gcc-multilib",
         "mercurial",
         "musl-tools",
         "rsync",
+        ...darcs,
       ]);
     } else if (PLATFORM === "macos") {
       await exec("brew", ["install", "darcs", "gpatch", "mercurial"]);