tests: make tests with temporary environment setting portable With "dash" (as "/bin/sh" on Debian GNU/Linux), command execution in "ENV=val foo bar" style doesn't work as expect in test script files, if "foo" is user-defined function: it works fine, if "foo" is existing commands like "hg". 09049042ab99 introduced tests for HGPLAIN and HGPLAINEXCEPT into test-revset.t, and all of them are in such style. This patch doesn't: - add explicit unsetting for HGPLAIN and HGPLAINEXCEPT they are already introduced by 09049042ab99 - write assignment and exporting in one line "ENV=val; export ENV" for two or more environment variables in one line causes failure of test-check-code-hg.t: it is recognized as "don't export and assign at once" unfortunately.

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#require serve

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  $ hg init server

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  $ cd server

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  $ cat >> .hg/hgrc << EOF

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  > [extensions]

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  > strip=

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  > EOF

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  $ echo 1 > foo

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  $ hg commit -A -m 'first'

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  adding foo

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  $ echo 2 > bar

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  $ hg commit -A -m 'second'

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  adding bar

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Produce a bundle to use

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  $ hg strip -r 1

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  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

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  saved backup bundle to $TESTTMP/server/.hg/strip-backup/ed602e697e0f-cc9fff6a-backup.hg (glob)

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Serve from a bundle file

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  $ hg serve -R .hg/strip-backup/ed602e697e0f-cc9fff6a-backup.hg -d -p $HGPORT --pid-file=hg.pid

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  $ cat hg.pid >> $DAEMON_PIDS

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Ensure we're serving from the bundle

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  $ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/?style=raw')

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  200 Script output follows

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  -rw-r--r-- 2 bar

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  -rw-r--r-- 2 foo

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