Environment and Configuration

class Env:
    """
    Environment configuration manager that handles Procfile loading,
    port configuration, and application root directory management.
    """
    
    def __init__(self, config):
        """
        Initialize environment with configuration dictionary.
        
        Parameters:
        - config: dict, configuration mapping (typically from ChainMap)
        """
    
    def load_procfile(self):
        """
        Load and parse the Procfile.
        
        Returns:
        Procfile object with parsed processes
        
        Raises:
        IOError: if Procfile doesn't exist or isn't readable
        AssertionError: if Procfile format is invalid
        """
    
    @property
    def port(self):
        """
        Get port as integer from configuration.
        
        Returns:
        int: port number
        
        Raises:
        ValueError: if port value is invalid
        """
    
    @property
    def procfile(self):
        """
        Get full path to Procfile.
        
        Returns:
        str: absolute path to Procfile
        """

class Procfile:
    """
    Data structure representing a Procfile with process definitions.
    """
    
    def __init__(self):
        """Initialize empty Procfile."""
    
    def add_process(self, name, command):
        """
        Add a process to the Procfile.
        
        Parameters:
        - name: str, process name (must be unique)
        - command: str, command to execute
        
        Raises:
        AssertionError: if process name is not unique
        """
    
    # Properties
    processes: 'OrderedDict[str, str]'  # Mapping of process names to commands

def parse_procfile(contents):
    """
    Parse Procfile content into a Procfile object.
    
    Parameters:
    - contents: str, raw Procfile content
    
    Returns:
    Procfile object with parsed processes
    """

def parse(content):
    """
    Parse the content of a .env file (KEY=value format) into a dictionary.
    
    Parameters:
    - content: str, .env file content with KEY=value lines
    
    Returns:
    dict: mapping of environment variable names to values
    """

def expand_processes(processes, concurrency=None, env=None, quiet=None, port=None):
    """
    Get a list of processes that need to be started given the specified
    process types, concurrency, environment, quietness, and base port number.
    
    Parameters:
    - processes: dict, mapping of process names to commands
    - concurrency: dict, optional concurrency specification per process type
    - env: dict, optional environment variables to apply to all processes
    - quiet: list, optional list of process names to suppress output for
    - port: int, optional base port number for PORT environment variable
    
    Returns:
    List[ProcessParams]: list of process parameter objects with name, cmd, env, and quiet
    """

ProcessParams = namedtuple("ProcessParams", "name cmd quiet env")

from honcho.environ import parse_procfile, Env

# Parse Procfile content
procfile_content = """
web: python app.py
worker: python worker.py
scheduler: python scheduler.py
"""

procfile = parse_procfile(procfile_content)
print(procfile.processes)
# OrderedDict([('web', 'python app.py'), ('worker', 'python worker.py'), ('scheduler', 'python scheduler.py')])

from honcho.environ import Env

# Configuration typically comes from command-line args, env vars, and defaults
config = {
    'app_root': '/path/to/app',
    'procfile': 'Procfile',
    'port': '5000'
}

env = Env(config)

# Load Procfile
try:
    procfile = env.load_procfile()
    print(f"Found {len(procfile.processes)} processes")
except IOError:
    print("Procfile not found")

# Get port configuration
try:
    port = env.port
    print(f"Port: {port}")
except ValueError as e:
    print(f"Invalid port: {e}")

from honcho.environ import parse

# Parse .env file content
env_content = """
DATABASE_URL=postgresql://localhost:5432/mydb
DEBUG=true
SECRET_KEY=my-secret-key
PORT=8000
"""

env_vars = parse(env_content)
print(env_vars)
# {'DATABASE_URL': 'postgresql://localhost:5432/mydb', 'DEBUG': 'true', 'SECRET_KEY': 'my-secret-key', 'PORT': '8000'}

from honcho.environ import expand_processes, parse_procfile

# Parse Procfile
procfile_content = """
web: python app.py
worker: python worker.py
"""
procfile = parse_procfile(procfile_content)

# Expand processes with concurrency and port assignment
concurrency = {'web': 2, 'worker': 3}
env_vars = {'DATABASE_URL': 'postgresql://localhost:5432/mydb'}
base_port = 5000

expanded = expand_processes(
    procfile.processes,
    concurrency=concurrency,
    env=env_vars,
    port=base_port
)

for process in expanded:
    print(f"Name: {process.name}")
    print(f"Command: {process.cmd}")
    print(f"Environment: {process.env}")
    print(f"Quiet: {process.quiet}")
    print("---")

# Output:
# Name: web.1
# Command: python app.py
# Environment: {'DATABASE_URL': 'postgresql://localhost:5432/mydb', 'HONCHO_PROCESS_NAME': 'web.1', 'PORT': '5000'}
# Quiet: False
# ---
# Name: web.2
# Command: python app.py
# Environment: {'DATABASE_URL': 'postgresql://localhost:5432/mydb', 'HONCHO_PROCESS_NAME': 'web.2', 'PORT': '5001'}
# Quiet: False
# ---
# Name: worker.1, worker.2, worker.3...

from collections import ChainMap
import os
from honcho.environ import Env

# Typical configuration chaining from CLI args, env files, OS env, and defaults
defaults = {'port': '5000', 'procfile': 'Procfile'}
os_env = {'PORT': os.environ.get('PORT')}
env_file = {'DATABASE_URL': 'postgresql://localhost:5432/mydb'}
cli_args = {'app_root': '/path/to/app'}

# Create configuration chain (first match wins)
config = ChainMap(cli_args, env_file, os_env, defaults)

# Create environment manager
env = Env(config)

import re

# Procfile line pattern for parsing
PROCFILE_LINE = re.compile(r'^([A-Za-z0-9_-]+):\s*(.+)$')