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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echo "[extensions]" >> $HGRCPATH

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echo "patchbomb=" >> $HGRCPATH

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hg init

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echo a > a

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hg commit -Ama -d '1 0'

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hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar tip | \

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  sed -e 's/\(Message-Id:.*@\).*/\1/'

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echo b > b

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hg commit -Amb -d '2 0'

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hg email --date '1970-1-1 0:2' -n -f quux -t foo -c bar -s test 0:tip | \

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  sed -e 's/\(Message-Id:.*@\).*/\1/' | \

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  sed -e 's/\(In-Reply-To:.*@\).*/\1/'

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hg email -m test.mbox -f quux -t foo -c bar -s test 0:tip