create action - in mypy we trust

.devcontainer/devcontainer.json

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+{
+  "name": "GHA (square-num-m)",
+  "image": "ghcr.io/jmlopez-rod/m-devcontainer-py311:latest",
+  "runArgs": ["--rm", "--network=host", "--name=square-num-devcontainer"],
+  "postStartCommand": "git config --global --add safe.directory ${containerWorkspaceFolder} && ./install_m.sh",
+  "containerEnv": {
+    "GITHUB_TOKEN": "${localEnv:GITHUB_TOKEN}",
+    "CONTAINER_WORKSPACE": "${containerWorkspaceFolder}"
+  },
+  "mounts": [
+    "source=opt_pnpm,target=/opt/pnpm,type=volume",
+    "source=opt_venv,target=/opt/venv,type=volume",
+    "source=m-vscode-server-extensions,target=/root/.vscode-server/extensions,type=volume",
+    "source=m-vscode-server-extensions-insiders,target=/root/.vscode-server-insiders/extensions,type=volume"
+  ],
+  "customizations": {
+    "vscode": {
+      "settings": {
+        "[json][jsonc][markdown][mdx][yaml]": {
+          "editor.defaultFormatter": "esbenp.prettier-vscode",
+          "editor.formatOnSave": true
+        },
+        "editor.renderWhitespace": "all",
+        "files.associations": {
+          "Makefile.*": "makefile"
+        },
+        "emeraldwalk.runonsave": {
+          "commands": [
+            {
+              "match": "\\.py$",
+              "cmd": "isort ${file}"
+            }
+          ]
+        },
+        "editor.minimap.enabled": false,
+        "editor.rulers": [80, 120],
+        "python.defaultInterpreterPath": "/opt/venv/m/bin/python",
+        "python.pythonPath": "/workspaces/gha-square-num-m/src",
+        "python.languageServer": "Pylance",
+        "python.linting.enabled": true,
+        "python.linting.pylintEnabled": true,
+        "python.linting.pylintArgs": ["--rc-file=.pylintrc"],
+        "python.linting.flake8Enabled": true,
+        "python.linting.flake8Args": ["--config=.flake8"],
+        "python.linting.mypyEnabled": true,
+        "python.linting.mypyArgs": ["--config-file=mypy.ini"]
+      },
+      "extensions": [
+        "GitHub.copilot",
+        "dbaeumer.vscode-eslint",
+        "esbenp.prettier-vscode",
+        "ms-python.python",
+        "ms-python.vscode-pylance",
+        "ms-python.flake8",
+        "EditorConfig.EditorConfig",
+        "unifiedjs.vscode-mdx",
+        "emeraldwalk.RunOnSave",
+        "streetsidesoftware.code-spell-checker"
+      ]
+    }
+  },
+  "shutdownAction": "stopContainer"
+}

.gitignore

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+node_modules
+m/.m
+.mypy_cache
+__pycache__

Makefile

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+mypy:
+	mypy src
+
+action:
+	m github actions src/pkg/actions.py

action.yaml

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+# AUTOGENERATED FILE - Do not update by hand!
+# Edit src/pkg/actions.py
+#   then run `m github actions [python_file]` to update
+
+name: Square Number
+description: Square the given number
+
+inputs:
+  num:
+    description: the number to square
+    required: true
+
+outputs:
+  squared-num:
+    description: the squared number
+    value: ${{ steps.square.outputs.squared-num }}
+
+runs:
+  using: composite
+  steps:
+    - id: square
+      shell: bash
+      env:
+        INPUT_NUM: ${{ inputs.num }}
+      run: PYTHONPATH="$GITHUB_ACTION_PATH/src" python -m pkg.main

install_m.sh

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+#!/bin/bash
+set -euxo pipefail
+
+branch=github-actions
+pip install "git+https://github.com/jmlopez-rod/m.git@$branch"
+
+/opt/m_helpers/_init.sh
+
+echo 'close this terminal and open another one then run `pnpm install`'

package.json

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+{
+  "name": "square-num-gha",
+  "version": "1.0.0",
+  "description": "",
+  "private": true,
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "prettier": "2.8.8"
+  }
+}

src/pkg/actions.py

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+from m.github.actions import Action
+
+from .inputs import GithubInputs
+from .main import main_step
+
+actions = Action(
+    name='Square Number',
+    description='Square the given number',
+    file_path='action.yaml',
+    inputs=GithubInputs,
+    steps=[
+        main_step(step_id='square', args=GithubInputs(num='inputs.num')),
+    ]
+)

src/pkg/inputs.py

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+from m.github.actions import InArg, KebabModel
+
+
+class GithubInputs(KebabModel):
+    """Inputs from the Github Action."""
+
+    num: str = InArg(help='the number to square')

src/pkg/main.py

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+from m.core import Good, Res
+from m.github.actions import KebabModel, OutArg, RunStep, run_action
+
+from .inputs import GithubInputs
+
+
+class Outputs(KebabModel):
+    """Outputs from the Github Action."""
+
+    squared_num: str = OutArg(help='the squared number', export=True)
+
+
+def main(inputs: GithubInputs) -> Res[Outputs]:
+    """Square the given number.
+    
+    Args:
+        inputs: The inputs to the step.
+
+    Returns:
+        The outputs of the step or an issue.
+    """
+    print('Squaring the number')
+    num = int(inputs.num)
+    result = num * num
+    return Good(Outputs(squared_num=str(result)))
+
+
+def main_step(
+    step_id: str,
+    args: GithubInputs
+) -> RunStep[GithubInputs, Outputs]:
+    """Create a step to square the given number.
+    
+    Args:
+        step_id: The id of the step.
+        inputs: The inputs to the step.
+
+    Returns:
+        A step to use in the action.
+    """
+    return RunStep[GithubInputs, Outputs](id=step_id, run=main, args=args)
+
+if __name__ == '__main__':
+    run_action(main)