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tests: use `f --hexdump` to print file content...

tests: use `f --hexdump` to print file content The inline print.py in this test wasn't fully compatible with Python 3 because it was reading from sys.stdin, which already normalized line endings since it operates in the realm of str on Python 3. To do this correctly, we'd need to read from sys.stdin.buffer on Python 3. This would entail conditional code. I felt this was too much effort. So I just replaced the custom script with `f`, which already knows how to do the right thing. test-mactext.t now passes on Python 3 on Windows. Differential Revision: https://phab.mercurial-scm.org/D8336

Gregory Szorc - - Load All Authors

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        $ cat > unix2mac.py <<EOF

        > import sys

        > 

        > for path in sys.argv[1:]:

        >     data = open(path, 'rb').read()

        >     data = data.replace(b'\n', b'\r')

        >     open(path, 'wb').write(data)

        > EOF

        $ hg init

        $ echo '[hooks]' >> .hg/hgrc

        $ echo 'pretxncommit.cr = python:hgext.win32text.forbidcr' >> .hg/hgrc

        $ echo 'pretxnchangegroup.cr = python:hgext.win32text.forbidcr' >> .hg/hgrc

        $ cat .hg/hgrc

        [hooks]

        pretxncommit.cr = python:hgext.win32text.forbidcr

        pretxnchangegroup.cr = python:hgext.win32text.forbidcr

        $ echo hello > f

        $ hg add f

        $ hg ci -m 1

        $ "$PYTHON" unix2mac.py f

        $ hg ci -m 2

        attempt to commit or push text file(s) using CR line endings

        in dea860dc51ec: f

        transaction abort!

        rollback completed

        abort: pretxncommit.cr hook failed

        [255]

        $ hg cat f | f --hexdump

        0000: 68 65 6c 6c 6f 0a                               |hello.|

        $ f --hexdump f

        f:

        0000: 68 65 6c 6c 6f 0d                               |hello.|

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				$ cat > unix2mac.py <<EOF
				> import sys
				>
				> for path in sys.argv[1:]:
				> data = open(path, 'rb').read()
				> data = data.replace(b'\n', b'\r')
				> open(path, 'wb').write(data)
				> EOF
				$ hg init
				$ echo '[hooks]' >> .hg/hgrc
				$ echo 'pretxncommit.cr = python:hgext.win32text.forbidcr' >> .hg/hgrc
				$ echo 'pretxnchangegroup.cr = python:hgext.win32text.forbidcr' >> .hg/hgrc
				$ cat .hg/hgrc
				[hooks]
				pretxncommit.cr = python:hgext.win32text.forbidcr
				pretxnchangegroup.cr = python:hgext.win32text.forbidcr

				$ echo hello > f
				$ hg add f
				$ hg ci -m 1

				$ "$PYTHON" unix2mac.py f
				$ hg ci -m 2
				attempt to commit or push text file(s) using CR line endings
				in dea860dc51ec: f
				transaction abort!
				rollback completed
				abort: pretxncommit.cr hook failed
				[255]
				$ hg cat f \| f --hexdump

				0000: 68 65 6c 6c 6f 0a \|hello.\|
				$ f --hexdump f
				f:
				0000: 68 65 6c 6c 6f 0d \|hello.\|