Exit Codes

mizu new myapp --template minimal
echo $?  # 0

mizu version
echo $?  # 0

# Template error (corrupted template)
mizu new myapp --template broken
echo $?  # 1

# Write error (permission denied)
mizu new /root/myapp --template minimal
echo $?  # 1

# Unknown command
mizu unknown
echo $?  # 2

# Missing required template
mizu new myapp
echo $?  # 2

# Unknown template
mizu new myapp --template nonexistent
echo $?  # 2

# In empty directory
cd /tmp/empty
mizu dev
# error: no runnable main package found (try --cmd)
echo $?  # 3

#!/bin/bash
set -e  # Exit on any error

# Create project (exits if fails)
mizu new myapp --template api

# Or handle specific codes
mizu dev || {
    code=$?
    case $code in
        1) echo "Error occurred" ;;
        2) echo "Invalid usage" ;;
        3) echo "No project found" ;;
        *) echo "App exited with code $code" ;;
    esac
    exit $code
}

if mizu new myapp --template minimal; then
    echo "Project created!"
    cd myapp && mizu dev
else
    echo "Failed to create project"
    exit 1
fi

# GitHub Actions
steps:
  - name: Create project
    run: mizu new myapp --template api
    # Fails job if exit code != 0

  - name: Validate project
    run: |
      cd myapp
      go mod tidy
      go build ./...

.PHONY: new dev

new:
	mizu new $(NAME) --template $(TEMPLATE) || exit 1

dev:
	mizu dev || (echo "Dev server failed with code $$?"; exit 1)

$ mizu unknown
error: unknown command "unknown"
Run 'mizu --help' for usage.
$ echo $?
2

$ mizu new myapp
error: template is required
Run 'mizu new --list' to see available templates.
$ echo $?
2

$ mizu dev  # in empty directory
error: no runnable main package found (try --cmd)
$ echo $?
3

mizu new myapp --json 2>&1

{
  "success": false,
  "error": {
    "code": "missing_template",
    "message": "template is required (use --template or --list)"
  }
}

# Bad - ignores failures
mizu new myapp --template api
cd myapp

# Good - fails fast
mizu new myapp --template api && cd myapp

#!/bin/bash
set -e  # Script exits on first error
set -o pipefail  # Pipeline fails on first error

mizu new myapp --template api
cd myapp
go mod tidy
mizu dev

mizu dev
case $? in
    0) echo "Clean shutdown" ;;
    3) echo "Run from a Go project directory" ;;
    *) echo "Unexpected exit" ;;
esac