fix: install Alpine runtime dependencies

src/main.ts

@@ -4,7 +4,8 @@ import { gte } from 'semver'
 import {
   getDownloadArchive,
   determineInstalledVersion,
-  getCliPath
+  getCliPath,
+  installAlpineRuntimeDependencies
 } from './utils.js'
 
 export const CLI_CONFIG_REGISTRY = 'SUPABASE_INTERNAL_IMAGE_REGISTRY'
@@ -37,6 +38,8 @@ export async function run(): Promise<void> {
         : await tc.extractTar(pathToArchive)
     const pathToCLI = getCliPath(extractedPath, download.format)
 
+    await installAlpineRuntimeDependencies(download.format)
+
     // Expose the tool by adding it to the PATH
     core.addPath(pathToCLI)
 

src/utils.ts

@@ -157,6 +157,37 @@ export const getCliPath = (
   return archiveFormat === 'apk' ? `${extractedPath}/usr/bin` : extractedPath
 }
 
+export const installAlpineRuntimeDependencies = async (
+  archiveFormat: ArchiveFormat
+): Promise<void> => {
+  if (archiveFormat !== 'apk') {
+    return
+  }
+
+  try {
+    await doExec('command -v apk')
+  } catch {
+    throw new Error(
+      'Linux musl containers need libstdc++ and libgcc to run Supabase CLI. Install them before supabase/setup-cli.'
+    )
+  }
+
+  try {
+    await doExec('apk info -e libstdc++ libgcc')
+    return
+  } catch {
+    const { stdout } = await doExec('id -u')
+    if (stdout.trim() !== '0') {
+      throw new Error(
+        "Alpine/musl containers need libstdc++ and libgcc to run Supabase CLI. Add 'apk add --no-cache libstdc++ libgcc' before supabase/setup-cli, or run this job container as root."
+      )
+    }
+  }
+
+  // The Supabase CLI shim in the apk dynamically links these Alpine runtime libraries.
+  await doExec('apk add --no-cache libstdc++ libgcc')
+}
+
 export const getDownloadUrl = async (
   version: string,
   githubToken?: string