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31 lines
921 B
ReStructuredText
31 lines
921 B
ReStructuredText
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**Added:**
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* <news item>
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**Changed:**
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* xonsh/environ.py: new rule: if default for "registered" environment variable is set to ``DefaultNotGiven``_
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(in env.register(), or DEFAULT_VARS) then variable has no default and raises KeyError if it is not defined in
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environment. Likewise, ``"var" in __xonsh__.env``_ will return False.
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* Changed defaults for ANSICON, TERM and VIRTUAL_ENV to DefaultNotGiven, so code can rationally test whether
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the expected external program has defined these variables. No need to do this for variables that xonsh
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itself defines.
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**Deprecated:**
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* <news item>
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**Removed:**
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* <news item>
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**Fixed:**
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* Fixed #3703 and #3739, recent code change made it impossible to tell whether a (registered) environment variable
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was missing from environment or present and set to its registered default value. The test for ANSICON was
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failing due to this.
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**Security:**
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* <news item>
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