### Environment File Example (.env)

Source: https://github.com/nickstenning/honcho/blob/main/doc/using_procfiles.rst

Demonstrates how to create a .env file to specify environment variables for Honcho processes. These variables are made available to all processes started by Honcho.

```shell
$ cat >.env <<EOF
RACK_ENV=production
ASSET_ROOT=https://myapp.s3.amazonaws.com/assets
PROCFILE=Procfile
EOF
```

--------------------------------

### Set up Honcho for Local Development

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Steps to install Honcho locally within a virtual environment using pip and setup tools. This includes installing Honcho in editable mode with export dependencies and tox.

```bash
mkvirtualenv honcho
cd honcho/
pip install -e .[export] tox
```

--------------------------------

### Example Honcho Export Commands

Source: https://github.com/nickstenning/honcho/blob/main/doc/export.rst

Demonstrates basic usage of the `honcho export` command for generating configuration files for supervisord and upstart. It shows how to specify the application name, format, and output directory.

```bash
$ honcho export -a myapp supervisord /etc/supervisor/conf.d

```

```bash
$ honcho export -a myapp upstart /etc/init

```

--------------------------------

### Start Processes with Honcho CLI

Source: https://context7.com/nickstenning/honcho/llms.txt

This command starts all processes defined in the Procfile or specific processes. It supports custom ports, multiple instances, suppressing output, using custom Procfile/env files, and disabling color/prefix.

```bash
# Start all processes defined in Procfile
honcho start

# Start specific processes
honcho start web worker

# Start with custom port (default is 5000)
honcho start -p 8000

# Run multiple instances of processes
honcho start -c web=2,worker=3

# Suppress output from specific processes
honcho start -q worker,cache

# Use custom Procfile and .env files
honcho -f Procfile.dev -e .env.local start

# Disable colored output and prefix
honcho --no-colour --no-prefix start
```

--------------------------------

### Procfile Syntax Example

Source: https://github.com/nickstenning/honcho/blob/main/doc/using_procfiles.rst

Defines the basic syntax for a Procfile, which is a plain text file listing process types and their corresponding shell commands. Process types can include alphanumerics, underscores, and dashes.

```plaintext
<process type>: <command>
```

--------------------------------

### Run a Specific Tox Environment

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Example of how to run a specific tox test environment, such as for Python 3.9, using the '-e' flag.

```bash
tox -e py39
```

--------------------------------

### Environment File (.env) Configuration Example

Source: https://context7.com/nickstenning/honcho/llms.txt

Shows the format of an .env file, which is used to define environment variables for all processes managed by Honcho. These variables can include database URLs, port numbers, and secret keys.

```env
# .env - environment variables for all processes
RACK_ENV=production
DATABASE_URL=postgresql://localhost/mydb
REDIS_URL=redis://localhost:6379/0
PORT=5000
SECRET_KEY=mysecretkey
PYTHONUNBUFFERED=true
```

--------------------------------

### Basic Procfile Structure Example

Source: https://context7.com/nickstenning/honcho/llms.txt

Defines the basic structure of a Procfile, where each line specifies a process type and its corresponding command. This format is used by Honcho to manage application processes.

```procfile
# Procfile - each line defines a process type
web: gunicorn -b "0.0.0.0:$PORT" -w 4 myapp:app
worker: python worker.py --priority high,med,low
worker_low: python worker.py --priority med,low
redis: redis-server
scheduler: python scheduler.py
```

--------------------------------

### Honcho Invocation with Custom Options

Source: https://github.com/nickstenning/honcho/blob/main/doc/using_procfiles.rst

An example of how to invoke Honcho with custom options, such as specifying a different application root directory and Procfile name. This is useful when your project structure deviates from the defaults.

```shell
$ honcho -d .. -f Procfile.dev start
```

--------------------------------

### Display Honcho Version and Help using CLI

Source: https://context7.com/nickstenning/honcho/llms.txt

These commands display the version information of Honcho and provide help messages. 'honcho version' shows the installed version, while 'honcho help' provides general help or specific command help.

```bash
# Show Honcho version
honcho version

# General help
honcho help

# Help for specific command
honcho help start
```

--------------------------------

### Python Plugin for Custom Honcho Exporter

Source: https://github.com/nickstenning/honcho/blob/main/doc/export.rst

Illustrates how to create a custom exporter plugin for Honcho using Python. This example defines a `SimpleExport` class that inherits from `honcho.export.base.BaseExport` and uses Jinja2 for templating. It includes methods to load templates and render them for each process.

```python
import jinja2

from honcho.export.base import BaseExport

class SimpleExport(BaseExport):
    def get_template_loader(self):
        return jinja2.PackageLoader(package_name=__package__,
                                    package_path='templates')

    def render(self, processes, context):
        tpl = get_template('run.sh')

        for p in processes:
            filename = 'run-{0}.sh'.format(p.name)
            ctx = context.copy()
            ctx['process'] = p
            script = tpl.render(ctx)

```

--------------------------------

### Python API: Manager Class for Process Management

Source: https://context7.com/nickstenning/honcho/llms.txt

Demonstrates how to use the `Manager` class from the `honcho.manager` module to programmatically start and manage multiple processes. It allows adding processes with custom commands, environments, and working directories, and includes a custom printer for output.

```python
import sys
from honcho.manager import Manager
from honcho.printer import Printer

# Create a manager instance with custom printer
printer = Printer(sys.stdout, colour=True, prefix=True)
manager = Manager(printer=printer)

# Add processes to the manager
manager.add_process('web', 'python server.py', env={'PORT': '8000'})
manager.add_process('worker', 'python worker.py', quiet=False)
manager.add_process('redis', 'redis-server', cwd='/var/lib/redis')

# Start all processes and wait for completion
manager.loop()

# Exit with appropriate return code
sys.exit(manager.returncode)
```

--------------------------------

### Setting PYTHONUNBUFFERED for Unbuffered Output in Honcho

Source: https://github.com/nickstenning/honcho/blob/main/doc/using_procfiles.rst

This example demonstrates how to set the PYTHONUNBUFFERED environment variable within a Procfile to ensure that Python programs do not buffer their output when run through Honcho. This is crucial for seeing small amounts of output in real-time. No external dependencies are required beyond Python and Honcho.

```Procfile
myprogram: PYTHONUNBUFFERED=true python myprogram.py
```

--------------------------------

### Process Events from Queue

Source: https://context7.com/nickstenning/honcho/llms.txt

Processes messages from an event queue, handling 'start', 'line', and 'stop' message types. It prints information about process status and output lines. No external dependencies are explicitly shown for this snippet.

```python
while not events.empty():
    msg = events.get()
    if msg.type == 'start':
        print(f"Process started with PID: {msg.data['pid']}")
    elif msg.type == 'line':
        print(f"Output: {msg.data}")
    elif msg.type == 'stop':
        print(f"Process exited with code: {msg.data['returncode']}")
```

--------------------------------

### Registering a Custom Honcho Exporter with Setuptools

Source: https://github.com/nickstenning/honcho/blob/main/doc/export.rst

Shows how to register a custom Honcho exporter plugin using the `entry_points` mechanism in a `setup.py` file. This allows Honcho to discover and utilize the custom exporter format.

```python
from setuptools import setup

setup(
    name='honcho_export_simple',
    ...
    entry_points={
        'honcho_exporters': [
            'simple=honcho_export_simple:SimpleExport',
        ],
    },
)

```

--------------------------------

### Honcho Command-Line Help

Source: https://github.com/nickstenning/honcho/blob/main/doc/using_procfiles.rst

Displays the available command-line arguments and tasks for the Honcho utility. It shows options for specifying environment files, application root directories, and Procfile paths.

```shell
$ honcho --help
usage: honcho [-h] [-e ENV] [-d DIR] [--no-colour] [--no-prefix] [-f FILE]
              [-v]
              {check,export,help,run,start,version} ...

Manage Procfile-based applications

optional arguments:
  -h, --help            show this help message and exit
  -e ENV, --env ENV     environment file[,file] (default: .env)
  -d DIR, --app-root DIR
                        procfile directory (default: .)
  --no-colour           disable coloured output
  --no-prefix           disable logging prefix
  -f FILE, --procfile FILE
                        procfile path (default: Procfile)
  -v, --version         show program's version number and exit

tasks:
  {check,export,help,run,start,version}
    check               validate a Procfile
    export              export a Procfile to another format
    help                describe available tasks or one specific task
    run                 run a command using your application's environment
    start               start the application (or a specific PROCESS)
    version             display honcho version
```

--------------------------------

### List Available Tox Environments

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Command to display a list of all available testing environments configured in tox.

```bash
tox -l
```

--------------------------------

### Merging Environment Files in Honcho

Source: https://github.com/nickstenning/honcho/blob/main/doc/using_procfiles.rst

Illustrates how Honcho can merge environment variables from multiple files specified with the -e option. This allows for a more organized way to manage different environment configurations.

```shell
$ echo 'ANIMAL_1=giraffe' >.env.one
$ echo 'ANIMAL_2=elephant' >.env.two
$ honcho -e .env.one,.env.two run sh -c 'env | grep -i animal'
ANIMAL_1=giraffe
ANIMAL_2=elephant
```

--------------------------------

### Run Tox with Pytest Arguments

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Demonstrates how to pass arguments to pytest through tox, such as using pytest's '-x' flag (stop after first error) with a specific interpreter like PyPy.

```bash
tox -e pypy -- -x
```

--------------------------------

### Clone Honcho Repository

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Instructions for cloning the Honcho repository to your local machine after forking it on GitHub.

```bash
$ git clone git@github.com:your_name_here/honcho.git
```

--------------------------------

### Run All Tox Environments

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Command to execute all defined test environments using tox, ensuring compatibility across different Python versions.

```bash
tox
```

--------------------------------

### Python API: Process Class for Single Process Execution

Source: https://context7.com/nickstenning/honcho/llms.txt

Illustrates the use of the `Process` class from the `honcho.process` module to run a single process with output capture. It allows configuring the command, name, color, quiet mode, environment variables, and handling process events.

```python
import multiprocessing
from honcho.process import Process

# Create a queue for process events
events = multiprocessing.Queue()

# Create and configure a process
proc = Process(
    cmd='python server.py',
    name='web',
    colour=32,  # ANSI color code (green)
    quiet=False,
    env={'PORT': '5000', 'DEBUG': 'true'}
)

# Run the process (blocks until process exits)
proc.run(events=events, ignore_signals=True)
```

--------------------------------

### Commit and Push Changes

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Steps to stage, commit, and push your local changes to your GitHub fork. It includes adding all changes, committing with a descriptive message, and pushing the branch.

```bash
git add .
git commit -m "Your detailed description of your changes."
git push origin name-of-your-bugfix-or-feature
```

--------------------------------

### Env - Parse and Load Procfile Configurations (Python)

Source: https://context7.com/nickstenning/honcho/llms.txt

Parses and loads process configurations from a Procfile and .env files using the honcho.environ module. It handles environment variable expansion and process concurrency. Dependencies include honcho.environ.

```python
from honcho.environ import Env, parse_procfile, parse, expand_processes

# Create Env instance with configuration
config = {
    'app_root': '.',
    'procfile': 'Procfile',
    'port': '5000'
}
env = Env(config)

# Load and parse Procfile
procfile = env.load_procfile()
for name, cmd in procfile.processes.items():
    print(f"{name}: {cmd}")

# Parse .env file content
env_content = """
DATABASE_URL=postgresql://localhost/mydb
REDIS_URL=redis://localhost:6379
DEBUG=true
"""
env_vars = parse(env_content)
print(env_vars)  # {'DATABASE_URL': '...', 'REDIS_URL': '...', 'DEBUG': 'true'}

# Expand processes with concurrency
processes = expand_processes(
    processes={'web': 'python server.py', 'worker': 'python worker.py'},
    concurrency={'web': 2, 'worker': 3},
    env={'SECRET_KEY': 'abc123'},
    port=5000
)

# Results in 5 ProcessParams objects:
# web.1 (PORT=5000), web.2 (PORT=5001)
# worker.1 (PORT=5100), worker.2 (PORT=5101), worker.3 (PORT=5102)
for p in processes:
    print(f"{p.name}: {p.cmd}")
    print(f"  Environment: {p.env}")
    print(f"  Quiet: {p.quiet}")
```

--------------------------------

### Execute Command with Environment using Honcho CLI

Source: https://context7.com/nickstenning/honcho/llms.txt

This command runs an arbitrary command with the application environment loaded from .env files. It supports multiple environment files and custom application root directories.

```bash
# Run arbitrary command with environment from .env
honcho run python manage.py shell

# Run with multiple env files (comma-separated)
honcho -e .env,.env.local run rails console

# Execute shell script with application config
honcho run bash scripts/deploy.sh

# Run with custom app root directory
honcho -d /path/to/app run npm test
```

--------------------------------

### Printer - Format and Display Process Output (Python)

Source: https://context7.com/nickstenning/honcho/llms.txt

Formats and displays process output using the honcho.printer module. It supports custom time formats, padding, coloring, and prefixes for messages. Dependencies include sys, datetime, and honcho.printer.

```python
import sys
import datetime
from honcho.printer import Printer, Message

# Create printer with custom formatting
printer = Printer(
    output=sys.stdout,
    time_format="%H:%M:%S",
    width=10,  # Width for process name padding
    colour=True,
    prefix=True
)

# Create and write a message
msg = Message(
    type='line',
    data=b'Server started on port 5000\n',
    time=datetime.datetime.now(),
    name='web',
    colour=32  # Green ANSI color code
)
printer.write(msg)

# Output format: "14:32:15 web        | Server started on port 5000"

# Write system message without color
system_msg = Message(
    type='line',
    data='All processes started\n',
    time=datetime.datetime.now(),
    name='system',
    colour=None
)
printer.write(system_msg)
```

--------------------------------

### Custom Export - Create Process Management Configurations (Python)

Source: https://context7.com/nickstenning/honcho/llms.txt

Defines a custom export mechanism for generating process management configuration files, extending honcho.export.base.BaseExport. It uses Jinja2 templating for rendering configurations. Dependencies include honcho.export, jinja2, and honcho.environ.

```python
from honcho.export.base import BaseExport, File
from jinja2 import PackageLoader

class CustomExport(BaseExport):
    def get_template_loader(self):
        return PackageLoader('mypackage', 'templates')

    def render(self, processes, context):
        """
        Generate configuration files for process management.

        Args:
            processes: List of ProcessParams with name, cmd, env, quiet
            context: Dict with app, app_root, log, shell, user keys

        Yields:
            File objects with name, content, executable attributes
        """
        template = self.get_template('myformat.conf')

        for process in processes:
            content = template.render(
                process=process,
                app=context['app'],
                user=context['user'],
                log_dir=context['log']
            )

            filename = f"{context['app']}-{process.name}.conf"
            yield File(name=filename, content=content, executable=False)

# Use the custom exporter
from honcho.environ import Env, expand_processes

config = {'app_root': '.', 'procfile': 'Procfile', 'port': '5000'}
env = Env(config)
procfile = env.load_procfile()

processes = expand_processes(
    procfile.processes,
    concurrency={'web': 2},
    env={'DATABASE_URL': 'postgresql://localhost/db'},
    port=5000
)

exporter = CustomExport()
context = {
    'app': 'myapp',
    'app_root': '/opt/myapp',
    'log': '/var/log/myapp',
    'shell': '/bin/bash',
    'user': 'appuser'
}

for file in exporter.render(processes, context):
    with open(f'/etc/myformat/{file.name}', 'w') as f:
        f.write(file.content)
    if file.executable:
        import os
        os.chmod(f'/etc/myformat/{file.name}', 0o755)
```

--------------------------------

### Popen - Subprocess Wrapper for Process Execution (Python)

Source: https://context7.com/nickstenning/honcho/llms.txt

Wraps subprocess execution using honcho.process.Popen, allowing for management of child processes. It supports environment variables, working directories, and capturing output. Dependencies include honcho.process and subprocess.

```python
from honcho.process import Popen
import subprocess

# Create a managed subprocess
proc = Popen(
    'python server.py',
    env={'PORT': '5000', 'DEBUG': 'true'},
    cwd='/path/to/app',
    start_new_session=True
)

# Read output line by line
for line in iter(proc.stdout.readline, b''):
    print(line.decode('utf-8'), end='')

# Wait for completion
proc.stdout.close()
proc.wait()
print(f"Process exited with code: {proc.returncode}")
```

--------------------------------

### Export Procfile to Process Management Formats using Honcho CLI

Source: https://context7.com/nickstenning/honcho/llms.txt

This command exports the Procfile configuration to various process management formats like systemd, supervisord, upstart, and runit. It supports custom application names, users, concurrency, ports, log directories, and custom templates.

```bash
# Export to systemd
honcho export -a myapp -u myuser systemd /etc/systemd/system

# Export to supervisord with custom concurrency
honcho export -c web=2,worker=4 -a myapp supervisord /etc/supervisor/conf.d

# Export to upstart with port and log configuration
honcho export -p 5000 -l /var/log/myapp -a myapp upstart /etc/init

# Export to runit with custom shell
honcho export -s /bin/bash -a myapp runit /etc/service

# Use custom templates directory
honcho export -t ./templates/supervisord -a myapp supervisord /etc/supervisor/conf.d
```

--------------------------------

### Create a New Branch for Development

Source: https://github.com/nickstenning/honcho/blob/main/CONTRIBUTING.rst

Command to create a new Git branch for developing bug fixes or new features.

```bash
git checkout -b name-of-your-bugfix-or-feature
```

--------------------------------

### Validate Procfile Syntax with Honcho CLI

Source: https://context7.com/nickstenning/honcho/llms.txt

This command checks the syntax of the Procfile. It can validate the default Procfile or a specific one, and provides output indicating if the Procfile is valid.

```bash
# Check default Procfile
honcho check

# Validate specific Procfile
honcho -f Procfile.production check

# Expected output for valid Procfile:
# Valid procfile detected (web, worker, redis)
```

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