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Allow nuking expandvars globally

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Kovid Goyal 2022-04-15 13:50:40 +05:30
parent e71b9091a3
commit 981ad88309
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 19 additions and 1 deletions
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20
kitty/utils.py
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@ -34,6 +34,24 @@ else:
Options = object Options = object
class Flag:
def __init__(self, initial_val: bool = True) -> None:
self.val = initial_val
def __enter__(self) -> None:
self.val ^= True
def __exit__(self, *a: object) -> None:
self.val ^= True
def __bool__(self) -> bool:
return self.val
disallow_expand_vars = Flag(False)
def expandvars(val: str, env: Mapping[str, str] = {}, fallback_to_os_env: bool = True) -> str: def expandvars(val: str, env: Mapping[str, str] = {}, fallback_to_os_env: bool = True) -> str:
''' '''
Expand $VAR and ${VAR} Use $$ for a literal $ Expand $VAR and ${VAR} Use $$ for a literal $
@ -48,7 +66,7 @@ def expandvars(val: str, env: Mapping[str, str] = {}, fallback_to_os_env: bool =
result = m.group() result = m.group()
return result return result
if '$' not in val: if disallow_expand_vars or '$' not in val:
return val return val
return re.sub(r'\$(?:(\w+)|\{([^}]+)\})', sub, val.replace('$$', '\0')).replace('\0', '$') return re.sub(r'\$(?:(\w+)|\{([^}]+)\})', sub, val.replace('$$', '\0')).replace('\0', '$')