| 1 | from __future__ import print_function
|
| 2 |
|
| 3 | from _devbuild.gen.runtime_asdl import scope_e
|
| 4 | from _devbuild.gen.value_asdl import value, value_e, value_t
|
| 5 | from core.error import e_die
|
| 6 | from core import pyos
|
| 7 | from core import pyutil
|
| 8 | from core import optview
|
| 9 | from core import state
|
| 10 | from frontend import location
|
| 11 | from mycpp.mylib import tagswitch, iteritems, log
|
| 12 | from osh import split
|
| 13 | from pylib import os_path
|
| 14 |
|
| 15 | import libc
|
| 16 | import posix_ as posix
|
| 17 |
|
| 18 | from typing import Dict, Optional, cast, TYPE_CHECKING
|
| 19 | if TYPE_CHECKING:
|
| 20 | from _devbuild.gen import arg_types
|
| 21 |
|
| 22 | _ = log
|
| 23 |
|
| 24 |
|
| 25 | class EnvConfig(object):
|
| 26 | """Define a string config var read from the environment.
|
| 27 |
|
| 28 | And it's default.
|
| 29 |
|
| 30 | In OSH, it will appear as $PS1 or $PATH or $PWD. You can't see the
|
| 31 | default.
|
| 32 |
|
| 33 | In YSH, it will appear as ENV.PS1 and __default__.PS1. I guess __default__
|
| 34 | can be a Dict or Obj.
|
| 35 |
|
| 36 | Usage:
|
| 37 |
|
| 38 | env_config.Define('PS1', r'\\s-\\v')
|
| 39 |
|
| 40 | # YSH: set ENV.PS1
|
| 41 | # OSH: set PS1
|
| 42 | env_config.InitFromEnv('PS1')
|
| 43 |
|
| 44 | # YSH - get from ENV or __default__
|
| 45 | env_config.Get('PS1')
|
| 46 |
|
| 47 | # Custom logic for PWD
|
| 48 | if not env_config.Exists('PWD'):
|
| 49 | pass
|
| 50 |
|
| 51 | More features:
|
| 52 |
|
| 53 | - On-demand BASHPID
|
| 54 | - io.thisPid() - is BASHPID
|
| 55 | - io.pid() - is $$
|
| 56 | - Init-once UID EUID PPID
|
| 57 | - maybe this should be a separate Funcs class?
|
| 58 | - io.uid() io.euid() io.ppid()
|
| 59 | """
|
| 60 |
|
| 61 | def __init__(self, mem, defaults):
|
| 62 | # type: (state.Mem, Dict[str, value_t]) -> None
|
| 63 |
|
| 64 | # mutates env_dict
|
| 65 | self.mem = mem
|
| 66 | self.exec_opts = mem.exec_opts
|
| 67 | self.defaults = defaults
|
| 68 |
|
| 69 | def Define(self, var_name, default_s):
|
| 70 | # type: (str, str) -> None
|
| 71 | """
|
| 72 | """
|
| 73 |
|
| 74 | def GetVal(self, var_name):
|
| 75 | # type: (str) -> value_t
|
| 76 | """
|
| 77 | YSH: Look at ENV.PATH, and then __defaults__.PATH
|
| 78 | OSH: Look at $PATH
|
| 79 | """
|
| 80 | if self.mem.exec_opts.env_obj(): # e.g. $[ENV.PATH]
|
| 81 |
|
| 82 | val = self.mem.env_dict.get(var_name)
|
| 83 | if val is None:
|
| 84 | val = self.defaults.get(var_name)
|
| 85 |
|
| 86 | if val is None:
|
| 87 | return value.Undef
|
| 88 |
|
| 89 | #log('**ENV obj val = %s', val)
|
| 90 |
|
| 91 | else: # e.g. $PATH
|
| 92 | val = self.mem.GetValue(var_name)
|
| 93 |
|
| 94 | return val
|
| 95 |
|
| 96 | def Get(self, var_name):
|
| 97 | # type: (str) -> Optional[str]
|
| 98 | """
|
| 99 | Like GetVal(), but returns a strin, or None
|
| 100 | """
|
| 101 | val = self.GetVal(var_name)
|
| 102 | if val.tag() != value_e.Str:
|
| 103 | return None
|
| 104 | return cast(value.Str, val).s
|
| 105 |
|
| 106 |
|
| 107 | class ShellFiles(object):
|
| 108 |
|
| 109 | def __init__(self, lang, home_dir, mem, flag):
|
| 110 | # type: (str, str, state.Mem, arg_types.main) -> None
|
| 111 | assert lang in ('osh', 'ysh'), lang
|
| 112 | self.lang = lang
|
| 113 | self.home_dir = home_dir
|
| 114 | self.mem = mem
|
| 115 | self.flag = flag
|
| 116 |
|
| 117 | self.init_done = False
|
| 118 |
|
| 119 | def HistVar(self):
|
| 120 | # type: () -> str
|
| 121 | return 'HISTFILE' if self.lang == 'osh' else 'YSH_HISTFILE'
|
| 122 |
|
| 123 | def DefaultHistoryFile(self):
|
| 124 | # type: () -> str
|
| 125 | return os_path.join(self.home_dir,
|
| 126 | '.local/share/oils/%s_history' % self.lang)
|
| 127 |
|
| 128 | def HistoryFile(self):
|
| 129 | # type: () -> Optional[str]
|
| 130 | assert self.init_done
|
| 131 |
|
| 132 | # TODO: In non-strict mode we should try to cast the HISTFILE value to a
|
| 133 | # string following bash's rules
|
| 134 | if 0:
|
| 135 | UP_val = self.mem.GetValue(self.HistVar())
|
| 136 | if UP_val.tag() == value_e.Str:
|
| 137 | val = cast(value.Str, UP_val)
|
| 138 | return val.s
|
| 139 | else:
|
| 140 | # Note: if HISTFILE is an array, bash will return ${HISTFILE[0]}
|
| 141 | return None
|
| 142 |
|
| 143 | #return state.GetStringFromEnv(self.mem, self.HistVar())
|
| 144 | return self.mem.env_config.Get(self.HistVar())
|
| 145 |
|
| 146 |
|
| 147 | def GetWorkingDir():
|
| 148 | # type: () -> str
|
| 149 | """Fallback for pwd and $PWD when there's no 'cd' and no inherited $PWD."""
|
| 150 | try:
|
| 151 | return posix.getcwd()
|
| 152 | except (IOError, OSError) as e:
|
| 153 | e_die("Can't determine working directory: %s" % pyutil.strerror(e))
|
| 154 |
|
| 155 |
|
| 156 | # This was derived from bash --norc -c 'argv "$COMP_WORDBREAKS".
|
| 157 | # Python overwrites this to something Python-specific in Modules/readline.c, so
|
| 158 | # we have to set it back!
|
| 159 | # Used in both core/competion.py and osh/state.py
|
| 160 | _READLINE_DELIMS = ' \t\n"\'><=;|&(:'
|
| 161 |
|
| 162 |
|
| 163 | def InitDefaultVars(mem):
|
| 164 | # type: (state.Mem) -> None
|
| 165 |
|
| 166 | # These 3 are special, can't be changed
|
| 167 | state.SetGlobalString(mem, 'UID', str(posix.getuid()))
|
| 168 | state.SetGlobalString(mem, 'EUID', str(posix.geteuid()))
|
| 169 | state.SetGlobalString(mem, 'PPID', str(posix.getppid()))
|
| 170 |
|
| 171 | # For getopts builtin - meant to be read, not changed
|
| 172 | state.SetGlobalString(mem, 'OPTIND', '1')
|
| 173 |
|
| 174 | # These can be changed. Could go AFTER environment, e.g. in
|
| 175 | # InitVarsAfterEnv().
|
| 176 |
|
| 177 | # Default value; user may unset it.
|
| 178 | # $ echo -n "$IFS" | python -c 'import sys;print repr(sys.stdin.read())'
|
| 179 | # ' \t\n'
|
| 180 | state.SetGlobalString(mem, 'IFS', split.DEFAULT_IFS)
|
| 181 |
|
| 182 | state.SetGlobalString(mem, 'HOSTNAME', libc.gethostname())
|
| 183 |
|
| 184 | # In bash, this looks like 'linux-gnu', 'linux-musl', etc. Scripts test
|
| 185 | # for 'darwin' and 'freebsd' too. They generally don't like at 'gnu' or
|
| 186 | # 'musl'. We don't have that info, so just make it 'linux'.
|
| 187 | state.SetGlobalString(mem, 'OSTYPE', pyos.OsType())
|
| 188 |
|
| 189 | # When xtrace_rich is off, this is just like '+ ', the shell default
|
| 190 | state.SetGlobalString(mem, 'PS4',
|
| 191 | '${SHX_indent}${SHX_punct}${SHX_pid_str} ')
|
| 192 |
|
| 193 | # bash-completion uses this. Value copied from bash. It doesn't integrate
|
| 194 | # with 'readline' yet.
|
| 195 | state.SetGlobalString(mem, 'COMP_WORDBREAKS', _READLINE_DELIMS)
|
| 196 |
|
| 197 | # TODO on $HOME: bash sets it if it's a login shell and not in POSIX mode!
|
| 198 | # if (login_shell == 1 && posixly_correct == 0)
|
| 199 | # set_home_var ();
|
| 200 |
|
| 201 |
|
| 202 | def CopyVarsFromEnv(exec_opts, environ, mem):
|
| 203 | # type: (optview.Exec, Dict[str, str], state.Mem) -> None
|
| 204 |
|
| 205 | # POSIX shell behavior: env vars become exported global vars
|
| 206 | if not exec_opts.no_exported():
|
| 207 | # This is the way dash and bash work -- at startup, they turn everything in
|
| 208 | # 'environ' variable into shell variables. Bash has an export_env
|
| 209 | # variable. Dash has a loop through environ in init.c
|
| 210 | for n, v in iteritems(environ):
|
| 211 | mem.SetNamed(location.LName(n),
|
| 212 | value.Str(v),
|
| 213 | scope_e.GlobalOnly,
|
| 214 | flags=state.SetExport)
|
| 215 |
|
| 216 | # YSH behavior: env vars go in ENV dict, not exported vars. Note that
|
| 217 | # ysh:upgrade can have BOTH ENV and exported vars. It's OK if they're on
|
| 218 | # at the same time.
|
| 219 | if exec_opts.env_obj():
|
| 220 | # This is for invoking bin/ysh
|
| 221 | # If you run bin/osh, then exec_opts.env_obj() will be FALSE at this point.
|
| 222 | # When you write shopt --set ysh:all or ysh:upgrade, then the shopt
|
| 223 | # builtin will call MaybeInitEnvDict()
|
| 224 | mem.MaybeInitEnvDict(environ)
|
| 225 |
|
| 226 |
|
| 227 | def InitVarsAfterEnv(mem):
|
| 228 | # type: (state.Mem) -> None
|
| 229 |
|
| 230 | # If PATH SHELLOPTS PWD are not in environ, then initialize them.
|
| 231 | if 0:
|
| 232 | s = mem.env_config.Get('PATH')
|
| 233 | if s is None:
|
| 234 | # Setting PATH to these two dirs match what zsh and mksh do. bash and
|
| 235 | # dash add {,/usr/,/usr/local}/{bin,sbin}
|
| 236 | state.SetStringInEnv(mem, 'PATH', '/bin:/usr/bin')
|
| 237 |
|
| 238 | if 1:
|
| 239 | val = mem.GetValue('PATH')
|
| 240 | if val.tag() == value_e.Undef:
|
| 241 | # Setting PATH to these two dirs match what zsh and mksh do. bash and
|
| 242 | # dash add {,/usr/,/usr/local}/{bin,sbin}
|
| 243 | state.SetGlobalString(mem, 'PATH', '/bin:/usr/bin')
|
| 244 |
|
| 245 | val = mem.GetValue('SHELLOPTS')
|
| 246 | if val.tag() == value_e.Undef:
|
| 247 | # Divergence: bash constructs a string here too, it doesn't just read it
|
| 248 | state.SetGlobalString(mem, 'SHELLOPTS', '')
|
| 249 | # It's readonly, even if it's not set
|
| 250 | mem.SetNamed(location.LName('SHELLOPTS'),
|
| 251 | None,
|
| 252 | scope_e.GlobalOnly,
|
| 253 | flags=state.SetReadOnly)
|
| 254 | # NOTE: bash also has BASHOPTS
|
| 255 |
|
| 256 | val = mem.GetValue('PWD')
|
| 257 | if val.tag() == value_e.Undef:
|
| 258 | state.SetGlobalString(mem, 'PWD', GetWorkingDir())
|
| 259 | # It's EXPORTED, even if it's not set. bash and dash both do this:
|
| 260 | # env -i -- dash -c env
|
| 261 | mem.SetNamed(location.LName('PWD'),
|
| 262 | None,
|
| 263 | scope_e.GlobalOnly,
|
| 264 | flags=state.SetExport)
|
| 265 |
|
| 266 | # Set a MUTABLE GLOBAL that's SEPARATE from $PWD. It's used by the 'pwd'
|
| 267 | # builtin, and it can't be modified by users.
|
| 268 | val = mem.GetValue('PWD')
|
| 269 | assert val.tag() == value_e.Str, val
|
| 270 | pwd = cast(value.Str, val).s
|
| 271 | mem.SetPwd(pwd)
|
| 272 |
|
| 273 |
|
| 274 | def InitInteractive(mem, sh_files, lang):
|
| 275 | # type: (state.Mem, ShellFiles, str) -> None
|
| 276 | """Initialization that's only done in the interactive/headless shell."""
|
| 277 |
|
| 278 | ps1_str = mem.env_config.Get('PS1')
|
| 279 | if ps1_str is None:
|
| 280 | # TODO: I don't want to export this default
|
| 281 | state.SetStringInEnv(mem, 'PS1', r'\s-\v\$ ')
|
| 282 | else:
|
| 283 | if lang == 'ysh':
|
| 284 | state.SetStringInEnv(mem, 'PS1', 'ysh ' + ps1_str)
|
| 285 |
|
| 286 | if 0:
|
| 287 | ps1_str = state.GetStringFromEnv(mem, 'PS1')
|
| 288 | if ps1_str is None:
|
| 289 | state.SetStringInEnv(mem, 'PS1', r'\s-\v\$ ')
|
| 290 | else:
|
| 291 | if lang == 'ysh':
|
| 292 | state.SetStringInEnv(mem, 'PS1', 'ysh ' + ps1_str)
|
| 293 |
|
| 294 | if 0:
|
| 295 | mem.env_config.defaults['PS1'] = value.Str(r'\s-\v\$ ')
|
| 296 | ps1_str = mem.env_config.Get('PS1')
|
| 297 | #log('ps1 %r', ps1_str)
|
| 298 | if ps1_str is not None:
|
| 299 | if lang == 'ysh': # YSH prepends 'ysh ' to PS1
|
| 300 | #state.SetStringInEnv(mem, 'PS1', 'ysh ' + ps1_str)
|
| 301 | #mem.env_config.defaults['PS1'] = value.Str('ysh ' + ps1_str)
|
| 302 | mem.env_dict['PS1'] = value.Str('ysh ' + ps1_str)
|
| 303 | #log('YSH %r', ps1_str)
|
| 304 |
|
| 305 | # TODO: use env_config
|
| 306 | hist_var = sh_files.HistVar()
|
| 307 | hist_val = mem.GetValue(hist_var)
|
| 308 | if hist_val.tag() == value_e.Undef:
|
| 309 | default_val = sh_files.DefaultHistoryFile()
|
| 310 | # Note: if the directory doesn't exist, GNU readline ignores it
|
| 311 | # This is like
|
| 312 | # HISTFILE=foo
|
| 313 | # setglobal HISTFILE = 'foo'
|
| 314 | # Not like:
|
| 315 | # export HISTFILE=foo
|
| 316 | # setglobal ENV.HISTFILE = 'foo'
|
| 317 | #
|
| 318 | # Note: bash only sets this in interactive shells
|
| 319 | state.SetGlobalString(mem, hist_var, default_val)
|
| 320 |
|
| 321 | sh_files.init_done = True # sanity check before using sh_files
|
| 322 |
|
| 323 | # Old logic:
|
| 324 | if 0:
|
| 325 | # PS1 is set, and it's YSH, then prepend 'ysh' to it to eliminate confusion
|
| 326 | ps1_val = mem.GetValue('PS1')
|
| 327 | with tagswitch(ps1_val) as case:
|
| 328 | if case(value_e.Undef):
|
| 329 | # Same default PS1 as bash
|
| 330 | state.SetGlobalString(mem, 'PS1', r'\s-\v\$ ')
|
| 331 |
|
| 332 | elif case(value_e.Str):
|
| 333 | # Hack so we don't confuse osh and ysh, but we still respect the
|
| 334 | # PS1.
|
| 335 |
|
| 336 | # The user can disable this with
|
| 337 | #
|
| 338 | # func renderPrompt() {
|
| 339 | # return ("${PS1@P}")
|
| 340 | # }
|
| 341 | if lang == 'ysh':
|
| 342 | user_setting = cast(value.Str, ps1_val).s
|
| 343 | state.SetGlobalString(mem, 'PS1', 'ysh ' + user_setting)
|
| 344 |
|
| 345 |
|
| 346 | def InitBuiltins(mem, version_str, defaults):
|
| 347 | # type: (state.Mem, str, Dict[str, value_t]) -> None
|
| 348 | """Initialize memory with shell defaults.
|
| 349 |
|
| 350 | Other interpreters could have different builtin variables.
|
| 351 | """
|
| 352 | # TODO: REMOVE this legacy. ble.sh checks it!
|
| 353 | mem.builtins['OIL_VERSION'] = value.Str(version_str)
|
| 354 |
|
| 355 | mem.builtins['OILS_VERSION'] = value.Str(version_str)
|
| 356 |
|
| 357 | mem.builtins['__defaults__'] = value.Dict(defaults)
|
| 358 |
|
| 359 | # The source builtin understands '///' to mean "relative to embedded stdlib"
|
| 360 | mem.builtins['LIB_OSH'] = value.Str('///osh')
|
| 361 | mem.builtins['LIB_YSH'] = value.Str('///ysh')
|
| 362 |
|
| 363 | # - C spells it NAN
|
| 364 | # - JavaScript spells it NaN
|
| 365 | # - Python 2 has float('nan'), while Python 3 has math.nan.
|
| 366 | #
|
| 367 | # - libc prints the strings 'nan' and 'inf'
|
| 368 | # - Python 3 prints the strings 'nan' and 'inf'
|
| 369 | # - JavaScript prints 'NaN' and 'Infinity', which is more stylized
|
| 370 | mem.builtins['NAN'] = value.Float(pyutil.nan())
|
| 371 | mem.builtins['INFINITY'] = value.Float(pyutil.infinity())
|