Don't try to determine interactivity if ui() called with interactive=False. WSGI applications are not supposed to refer to sys.stdin. In ed6df6b1c29a, hgweb and hgwebdir were fixed to pass interactive=False to their ui()'s, but sys.stdin.isatty() was still called by the ui objects. This change makes sure only the ui.fixconfig() method will call ui.isatty() (by making the ui._readline() method, which is currently only called from ui.prompt(), private). ui.fixconfig() is changed to let config files override the initial interactivity setting, but not check isatty() if interactive=False was specified in the creation of the ui.

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#!/bin/sh

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hg init

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mkdir alpha

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touch alpha/one

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mkdir beta

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touch beta/two

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hg add alpha/one beta/two

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hg ci -m "start" -d "1000000 0"

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echo 1 > alpha/one

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echo 2 > beta/two

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echo EVERYTHING

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hg diff --nodates

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echo BETA ONLY

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hg diff --nodates beta

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echo INSIDE BETA

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cd beta

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hg diff --nodates .