Refactor

1 files changed, 139 insertions, 6 deletions

diff --git a/dots_manager/config.py b/dots_manager/config.py
index d6194f6..96d3293 100644
--- a/dots_manager/config.py
+++ b/dots_manager/config.py
@@ -1,14 +1,147 @@
+import argparse
+import os
+import json
+import logging
 from dataclasses import dataclass
+from typing import Dict, Any, Optional
 from pathlib import Path
-import os
+from dots_manager.shell import run_shell_command
+from dots_manager.utils import merge_dicts
+from dots_manager.kawaii_logger import setup_logger
+
+
+@dataclass(frozen=True)
+class Environment:
+    platform: str
+    system_name: str
+    context: Dict[str, Any]
+    logger: logging.Logger
+
+    @staticmethod
+    def from_argv(args: argparse.Namespace):
+        logger = setup_logger(verbose=args.verbose, logger_name="dots_manager")
+
+        platform = args.platform or run_shell_command(
+            [str(args.helper_scripts / "platform.sh")], logger
+        )
+        if not platform:
+            raise ValueError("failed to determine platform... ")
+        os.environ["PLATFORM"] = platform
+
+        system_name: Optional[str] = args.system_name or run_shell_command(
+            [str(args.helper_scripts / "system_name.sh")], logger
+        )
+        if not system_name:
+            raise ValueError("failed to determine system name... ")
+
+        context = load_context(platform, system_name, args.context, logger)
+        return Environment(platform, system_name, context, logger)
 
 
 @dataclass(frozen=True)
-class Config:
+class Constants:
     default_target_dir: Path = Path.home()
-    default_source_dir: Path = Path(__file__).parent.parent / "dots"
-    default_compiled_dir: Path = Path("./.compiled_dotfiles/")
-    script_dir: Path = Path("home/scripts")
-    contexts: Path = Path("contexts.json")
+
+    dots_repo_dir: Path = Path.home() / Path("dotfiles")
+    default_source_dir: Path = dots_repo_dir / Path("dots")
+    default_compiled_dir: Path = dots_repo_dir / Path(".compiled_dotfiles")
+
+    default_script_dir: Path = default_source_dir / Path("home/scripts")
+    default_context: Path = dots_repo_dir / Path("context.json")
+
     template_extension: str = ".j2"
     max_workers: int = (os.cpu_count() or 1) * 2
+
+    global_context_key: str = "_global"
+    platform_default_context_key: str = "_default"
+
+
+def load_context(
+    platform: str, system_name: str, context_file: Path, logger: logging.Logger
+):
+    logger.info(f"reading context file: {context_file} ✧*:｡ﾟ✧")
+
+    context = json.loads(context_file.read_text())
+
+    global_context = context.get(Constants.global_context_key, {})
+    platform_defaults = context.get(platform, {}).get(
+        Constants.platform_default_context_key, {}
+    )
+    defaults = merge_dicts(global_context, platform_defaults)
+
+    system_config = context.get(platform, {}).get(system_name, {})
+    if not system_config:
+        logger.warning(
+            f"could not find context for 'contexts.{platform}.{system_name}' in {context_file.absolute()}"
+        )
+    return {
+        "platform": platform,
+        "system_name": system_name,
+        **merge_dicts(defaults, system_config),
+    }
+
+
+def parse_arguments() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="૮ ․ ․ ྀིა emprespresso's dotfiles manager 🐧✧˖°"
+    )
+    parser.add_argument(
+        "--verbose",
+        "-v",
+        action="store_true",
+        default=os.environ.get("DEBUG", "false").lower() in ("y", "yes", "true", "t"),
+        help="enables verbose logging.",
+    )
+
+    parser.add_argument("--compile", action="store_true", help="compile le dotfiles.")
+    parser.add_argument(
+        "--source",
+        type=Path,
+        default=Constants.default_source_dir,
+        help=f"where to look for templated dotfile packages. default: '{Constants.default_source_dir}'.",
+    )
+    parser.add_argument(
+        "--output",
+        type=Path,
+        default=Constants.default_compiled_dir,
+        help=f"where to store compiled, stowable dotfile packages. default: '{Constants.default_compiled_dir}'.",
+    )
+    parser.add_argument(
+        "--context",
+        type=Path,
+        default=Constants.default_context,
+        help=f"path to contexts, stored as json. default: '{Constants.default_context}'.",
+    )
+    parser.add_argument(
+        "--helper-scripts",
+        type=Path,
+        default=Constants.default_script_dir,
+        help="where to find executable scripts to determine system info (device name, platform, etc.).",
+    )
+    parser.add_argument(
+        "--system-name",
+        type=str,
+        default=None,
+        help="the system's name. when unspecified, inferred via the hostname, or on osx, computername.",
+    )
+    parser.add_argument(
+        "--platform",
+        type=str,
+        default=None,
+        help="the system's os platform (i.e. osx, linux, bsd, windows, etc.). when unspecified, inferred via $OSTYPE.",
+    )
+
+    parser.add_argument(
+        "--stow", action="store_true", help="action: stow compiled dotfiles"
+    )
+    parser.add_argument(
+        "--clean", action="store_true", help="action: clean stowed dotfiles"
+    )
+    parser.add_argument(
+        "--target",
+        type=Path,
+        default=Constants.default_target_dir,
+        help=f"where the dotfile packages' symlinks will be stowed. default: '{Constants.default_target_dir}'",
+    )
+
+    return parser.parse_args()