Add checks for programs which are required for the test suite to run. All prerequisite programs are checked for existance, and if any are missing, a list of missing programs is printed, and the test suite is aborted. All programs currently used in the tests, except those in core-utils, are checked.

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#!/bin/sh

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hg

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hg -q

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hg help

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hg -q help

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hg add -h

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hg add --skjdfks

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hg help diff

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hg help status

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hg -q help status

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hg help foo

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hg skjdfks

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exit 0