feat: baseline run:script, run:container and run:shell to support stdin and argv

dsl-reference.md

@@ -928,6 +928,8 @@ Enables the execution of external processes encapsulated within a containerized
 | ports | `map` | `no` | The container's port mappings, if any  |
 | volumes | `map` | `no` | The container's volume mappings, if any  |
 | environment | `map` | `no` | A key/value mapping of the environment variables, if any, to use when running the configured process |
+| stdin | `string` | `no` | A runtime expression, if any, passed as argv to the command or default container CMD|
+| arguments | `string[]` | `no` | A list of the arguments, if any, passed as argv to the command or default container CMD |
 | lifetime | [`containerLifetime`](#container-lifetime) | `no` | An object used to configure the container's lifetime. |
 
 ###### Examples
@@ -939,10 +941,23 @@ document:
   name: run-container-example
   version: '0.1.0'
 do:
+  - setInput:
+      set:
+        message: Hello World
   - runContainer:
+      input:
+        from: ${ .message }
       run:
         container:
-          image: fake-image
+          image: alpine
+          stdin: ${ . }
+          command: |
+            input=$(cat)
+            echo "STDIN was: $input"
+            echo "ARGS are $1 $2"
+          arguments:
+          - Foo
+          - Bar
 ```
 
 > [!NOTE]
@@ -961,9 +976,11 @@ Enables the execution of custom scripts or code within a workflow, empowering wo
 | language | `string` | `yes` | The language of the script to run.<br>*Supported values are: [`js`](https://tc39.es/ecma262/2024/) and [`python`](https://www.python.org/downloads/release/python-3131/).* |
 | code | `string` | `no` | The script's code.<br>*Required if `source` has not been set.* |
 | source | [externalResource](#external-resource) | `no` | The script's resource.<br>*Required if `code` has not been set.* |
-| arguments | `map` | `no` | A list of the arguments, if any, of the script to run |
+| stdin | `string` | `no` | A runtime expression, if any, to the script as standard input (stdin).|
+| arguments | `string[]` | `no` | A list of the arguments, if any, to the script as argv |
 | environment | `map` | `no` | A key/value mapping of the environment variables, if any, to use when running the configured script process |
 
+
 > [!WARNING]
 > To ensure cross-compatibility, Serverless Workflow strictly limits the versions of supported scripting languages. These versions may evolve with future releases. If you wish to use a different version of a language, you may do so by utilizing the [`container process`](#container-process).
 
@@ -1001,7 +1018,8 @@ Enables the execution of shell commands within a workflow, enabling workflows to
 | Name | Type | Required | Description |
 |:--|:---:|:---:|:---|
 | command | `string` | `yes` | The shell command to run |
-| arguments | `map` | `no` | A list of the arguments of the shell command to run |
+| stdin | `string` | `no` | A runtime expression, if any, to the shell command as standard input (stdin).|
+| arguments | `string[]` | `no` | A list of the arguments, if any, to the shell command as argv |
 | environment | `map` | `no` | A key/value mapping of the environment variables, if any, to use when running the configured process |
 
 ###### Examples
@@ -1013,10 +1031,22 @@ document:
   name: run-shell-example
   version: '0.1.0'
 do:
+  - setInput:
+      set:
+        message: Hello World
   - runShell:
+      input:
+        from: ${ .message }
       run:
         shell:
-          command: 'echo "Hello, ${ .user.name }"'
+          stdin: ${ . }
+          command: |
+            input=$(cat)
+            echo "STDIN was: $input"
+            echo "ARGS are $1 $2"
+          arguments:
+          - Foo
+          - Bar
 ```
 
 ##### Workflow Process
@@ -2829,4 +2859,4 @@ Describes the client of a [Model Context Protocol (MCP)](https://modelcontextpro
 ```yaml
 name: synapse
 version: '1.0.0-alpha5.2'
-```
+```

examples/run-container-stdin-and-arguments.yaml

@@ -0,0 +1,23 @@
+document:
+  dsl: '1.0.2'
+  namespace: test
+  name: run-container-stdin-and-arguments
+  version: '0.1.0'
+do:
+  - setInput:
+      set:
+        message: Hello World
+  - runContainer:
+      input:
+        from: ${ .message }
+      run:
+        container:
+          image: alpine
+          command: |
+            input=$(cat)
+            echo "STDIN was: $input"
+            echo "ARGS are $1 $2"
+          stdin: ${ . }
+          arguments:
+          - Foo
+          - Bar

examples/run-script-with-stdin-and-arguments.yaml

@@ -0,0 +1,30 @@
+document:
+  dsl: 1.0.2
+  namespace: examples
+  name: run-script-with-stdin-and-arguments
+  version: 1.0.0
+do:
+  - runScript:
+      output: 
+        as: "${ fromjson }"
+      run:
+        script:
+          language: javascript
+          stdin: "Hello Workflow"
+          environment:
+           foo: bar
+          arguments:
+          - hello
+          code: |
+            // Reading Input from STDIN
+            import { readFileSync } from 'node:fs';
+            const stdin = readFileSync(process.stdin.fd, 'utf8');
+            console.log('stdin > ', stdin) // Output: stdin > Hello Workflow
+
+            // Reading from argv
+            const [_, __, arg] = process.argv;
+            console.log('arg > ', arg) // Output: arg > hello
+
+            // Reading from env
+            const foo = process.env.foo;
+            console.log('env > ', foo) // Output: env > bar

examples/run-shell-stdin-and-arguments.yaml

@@ -0,0 +1,22 @@
+document:
+  dsl: 1.0.2
+  namespace: examples
+  name: run-script-with-stdin-and-arguments
+  version: 1.0.0
+do:
+  - setInput:
+      set:
+        message: Hello World
+  - runShell:
+      input:
+        from: ${ .message }
+      run:
+        shell:
+          stdin: ${ . }
+          command: |
+            input=$(cat)
+            echo "STDIN was: $input"
+            echo "ARGS are $1 $2"
+          arguments:
+          - Foo
+          - Bar

schema/workflow.yaml

@@ -809,6 +809,16 @@ $defs:
                       type: object
                       title: ContainerEnvironment
                       description: A key/value mapping of the environment variables, if any, to use when running the configured process.
+                    stdin:
+                      type: string
+                      title: ContainerStdin
+                      description: A runtime expression, if any, passed as argv to the command or default container CMD
+                    arguments:
+                      type: array
+                      title: ContainerArguments
+                      description: A list of the arguments, if any, passed as argv to the command or default container CMD
+                      items:
+                        type: string
                     lifetime:
                       $ref: '#/$defs/containerLifetime'
                       title: ContainerLifetime
@@ -828,11 +838,16 @@ $defs:
                       type: string
                       title: ScriptLanguage
                       description: The language of the script to run.
+                    stdin:
+                      type: string
+                      title: ScriptStdin
+                      description: A runtime expression, if any, to the script as standard input (stdin).
                     arguments:
-                      type: object
+                      type: array
                       title: ScriptArguments
-                      description: A key/value mapping of the arguments, if any, to use when running the configured script.
-                      additionalProperties: true
+                      description: A list of the arguments, if any, to the script as argv
+                      items:
+                        type: string                    
                     environment:
                       type: object
                       title: ScriptEnvironment
@@ -870,11 +885,16 @@ $defs:
                       type: string
                       title: ShellCommand
                       description: The shell command to run.
+                    stdin:
+                      type: string
+                      title: ShellStdin
+                      description: A runtime expression, if any, to the shell command as standard input (stdin).
                     arguments:
-                      type: object
+                      type: array
                       title: ShellArguments
-                      description: A list of the arguments of the shell command to run.
-                      additionalProperties: true
+                      description: A list of the arguments, if any, to the shell command as argv
+                      items:
+                        type: string    
                     environment:
                       type: object
                       title: ShellEnvironment
@@ -1928,4 +1948,4 @@ $defs:
       export:
         $ref: '#/$defs/export'
         title: SubscriptionIteratorExport
-        description: An object, if any, used to customize the content of the workflow context.
+        description: An object, if any, used to customize the content of the workflow context.