Adding inContainer input parameter to be able to switch between direct and in-container mode of execution

Author: Waldek Herka

action.yml

@@ -9,6 +9,10 @@ inputs:
     description: 'Azure CLI version to be used to execute the script. If not provided, latest version is used'
     required: false
     default: 'agentazcliversion'
+  inContainer:
+    description: 'Execute the commands in container'
+    required: false
+    default: true
 branding:
   icon: 'login.svg'
   color: 'blue'

dist/index.js

@@ -10,6 +10,7 @@ const cpExec = util.promisify(require('child_process').exec);
 import { createScriptFile, TEMP_DIRECTORY, NullOutstreamStringWritable, deleteFile, getCurrentTime, checkIfEnvironmentVariableIsOmitted } from './utils';
 
 const START_SCRIPT_EXECUTION_MARKER: string = "Starting script execution via docker image mcr.microsoft.com/azure-cli:";
+const START_SCRIPT_DIRECT_EXECUTION_MARKER: string = "Starting script execution via az in the agent:";
 const AZ_CLI_VERSION_DEFAULT_VALUE = 'agentazcliversion'
 const prefix = !!process.env.AZURE_HTTP_USER_AGENT ? `${process.env.AZURE_HTTP_USER_AGENT}` : "";
 
@@ -21,13 +22,15 @@ export async function main() {
 
     var scriptFileName: string = '';
     const CONTAINER_NAME = `MICROSOFT_AZURE_CLI_${getCurrentTime()}_CONTAINER`;
+    let executingInContainer: boolean = false;
     try {
         if (process.env.RUNNER_OS != 'Linux') {
             throw new Error('Please use Linux-based OS as a runner.');
         }
 
         let inlineScript: string = core.getInput('inlineScript', { required: true });
         let azcliversion: string = core.getInput('azcliversion', { required: false }).trim().toLowerCase();
+        let inContainer: boolean = core.getInput('inContainer', { required: false }).trim().toLowerCase() === 'true';
 
         if (azcliversion == AZ_CLI_VERSION_DEFAULT_VALUE) {
             try {
@@ -48,9 +51,22 @@ export async function main() {
             core.error('Please enter a valid script.');
             throw new Error('Please enter a valid script.')
         }
+        if (inContainer == false) {
+            try {
+                inlineScript = ` set -e >&2; echo '${START_SCRIPT_DIRECT_EXECUTION_MARKER}' >&2; ${inlineScript}`;
+                scriptFileName = await createScriptFile(inlineScript);        
+                let args: string[] = ["--noprofile", "--norc", "-e", `${TEMP_DIRECTORY}/${scriptFileName}`];
+                console.log(`${START_SCRIPT_DIRECT_EXECUTION_MARKER}`);
+                await executeBashCommand(args);
+                console.log("az script ran successfully.");
+                return;
+            } catch (err) {
+                console.log('Failed to fetch az cli version from agent. Reverting back to execution in container.')
+            }
+        }
+        executingInContainer = true;
         inlineScript = ` set -e >&2; echo '${START_SCRIPT_EXECUTION_MARKER}' >&2; ${inlineScript}`;
         scriptFileName = await createScriptFile(inlineScript);
-
         /*
         For the docker run command, we are doing the following
         - Set the working directory for docker continer
@@ -75,6 +91,7 @@ export async function main() {
         console.log(`${START_SCRIPT_EXECUTION_MARKER}${azcliversion}`);
         await executeDockerCommand(args);
         console.log("az script ran successfully.");
+
     }
     catch (error) {
         core.error(error);
@@ -84,8 +101,10 @@ export async function main() {
         // clean up
         const scriptFilePath: string = path.join(TEMP_DIRECTORY, scriptFileName);
         await deleteFile(scriptFilePath);
-        console.log("cleaning up container...");
-        await executeDockerCommand(["rm", "--force", CONTAINER_NAME], true);
+        if (executingInContainer) {
+            console.log("cleaning up container...");
+            await executeDockerCommand(["rm", "--force", CONTAINER_NAME], true);
+        }
     }
 };
 
@@ -157,3 +176,43 @@ const executeDockerCommand = async (args: string[], continueOnError: boolean = f
         core.warning(errorStream)
     }
 }
+
+const executeBashCommand = async (args: string[], continueOnError: boolean = false): Promise<void> => {
+
+    const bash: string = await io.which("bash", true);
+    var errorStream: string = '';
+    var shouldOutputErrorStream: boolean = false;
+    var execOptions: any = {
+        outStream: new NullOutstreamStringWritable({ decodeStrings: false }),
+        listeners: {
+            stdout: (data: any) => console.log(data.toString()), //to log the script output while the script is running.
+            errline: (data: string) => {
+                if (!shouldOutputErrorStream) {
+                    errorStream += data + os.EOL;
+                }
+                else {
+                    console.log(data);
+                }
+                if (data.trim() === START_SCRIPT_EXECUTION_MARKER) {
+                    shouldOutputErrorStream = true;
+                    errorStream = ''; // Flush the container logs. After this, script error logs will be tracked.
+                }
+            }
+        }
+    };
+    var exitCode;
+    try {
+        exitCode = await exec.exec(bash, args, execOptions);
+    } catch (error) {
+        if (!continueOnError) {
+            throw error;
+        }
+        core.warning(error);
+    }
+    finally {
+        if (exitCode !== 0 && !continueOnError) {
+            throw new Error(errorStream || 'az cli script failed.');
+        }
+        core.warning(errorStream)
+    }
+}