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| 1 | +""" |
| 2 | +Shell profile loader for bensch. |
| 3 | + |
| 4 | +Profiles describe a shell's capabilities, prompt format, rc-disable |
| 5 | +mechanism, and test mode configuration. The runner uses this to |
| 6 | +adapt its behavior for any shell. |
| 7 | +""" |
| 8 | + |
| 9 | +import os |
| 10 | +import yaml |
| 11 | +from pathlib import Path |
| 12 | +from typing import Dict, Any, Optional |
| 13 | + |
| 14 | + |
| 15 | +DEFAULT_PROFILE = { |
| 16 | + "name": "generic", |
| 17 | + "display_name": "Unknown Shell", |
| 18 | + "prompt_pattern": r"\$ ", |
| 19 | + "prompt_set_command": "PS1='$ '", |
| 20 | + "mode_reset_command": "", |
| 21 | + "rc_disable": {"flags": [], "env": {}}, |
| 22 | + "test_mode_env": {}, |
| 23 | + "history_disable": {"env": {"HISTFILE": "/dev/null"}}, |
| 24 | + "capabilities": { |
| 25 | + "readline": False, |
| 26 | + "vi_mode": False, |
| 27 | + "job_control": True, |
| 28 | + "command_completion": False, |
| 29 | + "programmable_completion": False, |
| 30 | + "coproc": False, |
| 31 | + "arrays": False, |
| 32 | + "associative_arrays": False, |
| 33 | + }, |
| 34 | + "suites": {"skip": [], "extra": []}, |
| 35 | +} |
| 36 | + |
| 37 | + |
| 38 | +def find_profiles_dir() -> Path: |
| 39 | + """Find the profiles/ directory relative to this file.""" |
| 40 | + return Path(__file__).parent.parent / "profiles" |
| 41 | + |
| 42 | + |
| 43 | +def load_profile(name: str) -> Dict[str, Any]: |
| 44 | + """ |
| 45 | + Load a shell profile by name. |
| 46 | + |
| 47 | + Args: |
| 48 | + name: Profile name (e.g., 'bash', 'fortsh', 'generic') |
| 49 | + |
| 50 | + Returns: |
| 51 | + Profile dict with all fields populated (defaults merged) |
| 52 | + """ |
| 53 | + profiles_dir = find_profiles_dir() |
| 54 | + profile_path = profiles_dir / f"{name}.yaml" |
| 55 | + |
| 56 | + if not profile_path.exists(): |
| 57 | + # Fall back to generic |
| 58 | + profile_path = profiles_dir / "generic.yaml" |
| 59 | + if not profile_path.exists(): |
| 60 | + return dict(DEFAULT_PROFILE) |
| 61 | + |
| 62 | + with open(profile_path) as f: |
| 63 | + profile = yaml.safe_load(f) or {} |
| 64 | + |
| 65 | + # Merge with defaults (profile overrides defaults) |
| 66 | + merged = dict(DEFAULT_PROFILE) |
| 67 | + for key, value in profile.items(): |
| 68 | + if isinstance(value, dict) and key in merged and isinstance(merged[key], dict): |
| 69 | + merged[key] = {**merged[key], **value} |
| 70 | + else: |
| 71 | + merged[key] = value |
| 72 | + |
| 73 | + return merged |
| 74 | + |
| 75 | + |
| 76 | +def detect_profile(shell_path: str) -> str: |
| 77 | + """ |
| 78 | + Auto-detect profile name from shell binary path. |
| 79 | + |
| 80 | + Args: |
| 81 | + shell_path: Path to the shell binary |
| 82 | + |
| 83 | + Returns: |
| 84 | + Profile name (e.g., 'bash', 'zsh', 'generic') |
| 85 | + """ |
| 86 | + basename = os.path.basename(shell_path).lower() |
| 87 | + |
| 88 | + profiles_dir = find_profiles_dir() |
| 89 | + available = [p.stem for p in profiles_dir.glob("*.yaml")] |
| 90 | + |
| 91 | + # Direct match |
| 92 | + for name in available: |
| 93 | + if basename.startswith(name): |
| 94 | + return name |
| 95 | + |
| 96 | + # Common aliases |
| 97 | + aliases = { |
| 98 | + "sh": "dash", |
| 99 | + "ksh93": "ksh", |
| 100 | + "mksh": "ksh", |
| 101 | + "pdksh": "ksh", |
| 102 | + } |
| 103 | + if basename in aliases: |
| 104 | + return aliases[basename] |
| 105 | + |
| 106 | + return "generic" |
| 107 | + |
| 108 | + |
| 109 | +def get_rc_disable_env(profile: Dict[str, Any]) -> str: |
| 110 | + """ |
| 111 | + Build the RC_DISABLE_ENV string for shell script tests. |
| 112 | + |
| 113 | + Returns a string like 'BASH_ENV= ' or 'FORTSH_RC_FILE=/dev/null ' |
| 114 | + suitable for prefixing shell commands. |
| 115 | + """ |
| 116 | + env_vars = profile.get("rc_disable", {}).get("env", {}) |
| 117 | + parts = [f"{k}={v}" for k, v in env_vars.items()] |
| 118 | + return " ".join(parts) |
| 119 | + |
| 120 | + |
| 121 | +def get_rc_disable_flags(profile: Dict[str, Any]) -> list: |
| 122 | + """Get CLI flags to disable rc file loading.""" |
| 123 | + return profile.get("rc_disable", {}).get("flags", []) |
| 124 | + |
| 125 | + |
| 126 | +def should_skip_suite(profile: Dict[str, Any], suite_name: str) -> bool: |
| 127 | + """Check if a suite should be skipped for this shell.""" |
| 128 | + skip_list = profile.get("suites", {}).get("skip", []) |
| 129 | + return suite_name in skip_list |
| 130 | + |
| 131 | + |
| 132 | +def has_capability(profile: Dict[str, Any], capability: str) -> bool: |
| 133 | + """Check if the shell has a specific capability.""" |
| 134 | + return profile.get("capabilities", {}).get(capability, False) |
