view tests/test-hybridencode.py @ 32697:19b9fc40cc51

revlog: skeleton support for version 2 revlogs

There are a number of improvements we want to make to revlogs
that will require a new version - version 2. It is unclear what the
full set of improvements will be or when we'll be done with them.
What I do know is that the process will likely take longer than a
single release, will require input from various stakeholders to
evaluate changes, and will have many contentious debates and
bikeshedding.

It is unrealistic to develop revlog version 2 up front: there
are just too many uncertainties that we won't know until things
are implemented and experiments are run. Some changes will also
be invasive and prone to bit rot, so sitting on dozens of patches
is not practical.

This commit introduces skeleton support for version 2 revlogs in
a way that is flexible and not bound by backwards compatibility
concerns.

An experimental repo requirement for denoting revlog v2 has been
added. The requirement string has a sub-version component to it.
This will allow us to declare multiple requirements in the course
of developing revlog v2. Whenever we change the in-development
revlog v2 format, we can tweak the string, creating a new
requirement and locking out old clients. This will allow us to
make as many backwards incompatible changes and experiments to
revlog v2 as we want. In other words, we can land code and make
meaningful progress towards revlog v2 while still maintaining
extreme format flexibility up until the point we freeze the
format and remove the experimental labels.

To enable the new repo requirement, you must supply an experimental
and undocumented config option. But not just any boolean flag
will do: you need to explicitly use a value that no sane person
should ever type. This is an additional guard against enabling
revlog v2 on an installation it shouldn't be enabled on. The
specific scenario I'm trying to prevent is say a user with a
4.4 client with a frozen format enabling the option but then
downgrading to 4.3 and accidentally creating repos with an
outdated and unsupported repo format. Requiring a "challenge"
string should prevent this.

Because the format is not yet finalized and I don't want to take
any chances, revlog v2's version is currently 0xDEAD. I figure
squatting on a value we're likely never to use as an actual revlog
version to mean "internal testing only" is acceptable. And
"dead" is easily recognized as something meaningful.

There is a bunch of cleanup that is needed before work on revlog
v2 begins in earnest. I plan on doing that work once this patch
is accepted and we're comfortable with the idea of starting down
this path.

from __future__ import absolute_import, print_function
from mercurial import (
    store,
)

def show(s):
    # show test input
    print("A = '%s'" % s.encode("string_escape"))

    # show the result of the C implementation, if available
    h = store._pathencode(s)
    print("B = '%s'" % h.encode("string_escape"))

    # compare it with reference implementation in Python
    r = store._hybridencode(s, True)
    if h != r:
        print("R = '%s'" % r.encode("string_escape"))
    print()

show("data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&'()+,-.;=[]^`{}")

print("uppercase char X is encoded as _x")
show("data/ABCDEFGHIJKLMNOPQRSTUVWXYZ")

print("underbar is doubled")
show("data/_")

print("tilde is character-encoded")
show("data/~")

print("characters in ASCII code range 1..31")
show('data/\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f'
          '\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f')

print("characters in ASCII code range 126..255")
show('data/\x7e\x7f'
          '\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f'
          '\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f')
show('data/\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf'
          '\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf')
show('data/\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf'
          '\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf')
show('data/\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef'
          '\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff')

print("Windows reserved characters")
show('data/less <, greater >, colon :, double-quote ", backslash \\'
           ', pipe |, question-mark ?, asterisk *')

print("encoding directories ending in .hg, .i or .d with '.hg' suffix")
show('data/x.h.i/x.hg/x.i/x.d/foo')
show('data/a.hg/a.i/a.d/foo')
show('data/au.hg/au.i/au.d/foo')
show('data/aux.hg/aux.i/aux.d/foo')
show('data/auxy.hg/auxy.i/auxy.d/foo')

print("but these are not encoded on *filenames*")
show('data/foo/x.hg')
show('data/foo/x.i')
show('data/foo/x.d')
show('data/foo/a.hg')
show('data/foo/a.i')
show('data/foo/a.d')
show('data/foo/au.hg')
show('data/foo/au.i')
show('data/foo/au.d')
show('data/foo/aux.hg')
show('data/foo/aux.i')
show('data/foo/aux.d')
show('data/foo/auxy.hg')
show('data/foo/auxy.i')
show('data/foo/auxy.d')

print("plain .hg, .i and .d directories have the leading dot encoded")
show('data/.hg/.i/.d/foo')

show('data/aux.bla/bla.aux/prn/PRN/lpt/com3/nul/coma/foo.NUL/normal.c.i')

show('data/AUX/SECOND/X.PRN/FOURTH/FI:FTH/SIXTH/SEVENTH/EIGHTH/NINETH/'
     'TENTH/ELEVENTH/LOREMIPSUM.TXT.i')
show('data/enterprise/openesbaddons/contrib-imola/corba-bc/netbeansplugin/'
     'wsdlExtension/src/main/java/META-INF/services/org.netbeans.modules'
     '.xml.wsdl.bindingsupport.spi.ExtensibilityElementTemplateProvider.i')
show('data/AUX.THE-QUICK-BROWN-FOX-JU:MPS-OVER-THE-LAZY-DOG-THE-QUICK-'
     'BROWN-FOX-JUMPS-OVER-THE-LAZY-DOG.TXT.i')
show('data/Project Planning/Resources/AnotherLongDirectoryName/'
     'Followedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt')
show('data/Project.Planning/Resources/AnotherLongDirectoryName/'
     'Followedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt')
show('data/foo.../foo   / /a./_. /__/.x../    bla/.FOO/something.i')

show('data/c/co/com/com0/com1/com2/com3/com4/com5/com6/com7/com8/com9')
show('data/C/CO/COM/COM0/COM1/COM2/COM3/COM4/COM5/COM6/COM7/COM8/COM9')
show('data/c.x/co.x/com.x/com0.x/com1.x/com2.x/com3.x/com4.x/com5.x'
                                        '/com6.x/com7.x/com8.x/com9.x')
show('data/x.c/x.co/x.com0/x.com1/x.com2/x.com3/x.com4/x.com5'
                                        '/x.com6/x.com7/x.com8/x.com9')
show('data/cx/cox/comx/com0x/com1x/com2x/com3x/com4x/com5x'
                                            '/com6x/com7x/com8x/com9x')
show('data/xc/xco/xcom0/xcom1/xcom2/xcom3/xcom4/xcom5'
                                            '/xcom6/xcom7/xcom8/xcom9')

show('data/l/lp/lpt/lpt0/lpt1/lpt2/lpt3/lpt4/lpt5/lpt6/lpt7/lpt8/lpt9')
show('data/L/LP/LPT/LPT0/LPT1/LPT2/LPT3/LPT4/LPT5/LPT6/LPT7/LPT8/LPT9')
show('data/l.x/lp.x/lpt.x/lpt0.x/lpt1.x/lpt2.x/lpt3.x/lpt4.x/lpt5.x'
                                        '/lpt6.x/lpt7.x/lpt8.x/lpt9.x')
show('data/x.l/x.lp/x.lpt/x.lpt0/x.lpt1/x.lpt2/x.lpt3/x.lpt4/x.lpt5'
                                        '/x.lpt6/x.lpt7/x.lpt8/x.lpt9')
show('data/lx/lpx/lptx/lpt0x/lpt1x/lpt2x/lpt3x/lpt4x/lpt5x'
                                            '/lpt6x/lpt7x/lpt8x/lpt9x')
show('data/xl/xlp/xlpt/xlpt0/xlpt1/xlpt2/xlpt3/xlpt4/xlpt5'
                                            '/xlpt6/xlpt7/xlpt8/xlpt9')

show('data/con/p/pr/prn/a/au/aux/n/nu/nul')
show('data/CON/P/PR/PRN/A/AU/AUX/N/NU/NUL')
show('data/con.x/p.x/pr.x/prn.x/a.x/au.x/aux.x/n.x/nu.x/nul.x')
show('data/x.con/x.p/x.pr/x.prn/x.a/x.au/x.aux/x.n/x.nu/x.nul')
show('data/conx/px/prx/prnx/ax/aux/auxx/nx/nux/nulx')
show('data/xcon/xp/xpr/xprn/xa/xau/xaux/xn/xnu/xnul')

show('data/a./au./aux./auxy./aux.')
show('data/c./co./con./cony./con.')
show('data/p./pr./prn./prny./prn.')
show('data/n./nu./nul./nuly./nul.')
show('data/l./lp./lpt./lpt1./lpt1y./lpt1.')
show('data/lpt9./lpt9y./lpt9.')
show('data/com./com1./com1y./com1.')
show('data/com9./com9y./com9.')

show('data/a /au /aux /auxy /aux ')

print("largest unhashed path")
show('data/123456789-123456789-123456789-123456789-123456789-'
          'unhashed--xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("shortest hashed path")
show('data/123456789-123456789-123456789-123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("changing one char in part that's hashed away produces a different hash")
show('data/123456789-123456789-123456789-123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxy-'
          '123456789-123456')

print("uppercase hitting length limit due to encoding")
show('data/A23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/Z23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("compare with lowercase not hitting limit")
show('data/a23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/z23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("not hitting limit with any of these")
show("data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&'()+,-.;="
          "[]^`{}xxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-"
          "123456789-12345")

print("underbar hitting length limit due to encoding")
show('data/_23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("tilde hitting length limit due to encoding")
show('data/~23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("Windows reserved characters hitting length limit")
show('data/<23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/>23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/:23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/"23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/\\23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/|23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/?23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/*23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("initial space hitting length limit")
show('data/ 23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("initial dot hitting length limit")
show('data/.23456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("trailing space in filename hitting length limit")
show('data/123456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-1234 ')

print("trailing dot in filename hitting length limit")
show('data/123456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-1234.')

print("initial space in directory hitting length limit")
show('data/ x/456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("initial dot in directory hitting length limit")
show('data/.x/456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("trailing space in directory hitting length limit")
show('data/x /456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("trailing dot in directory hitting length limit")
show('data/x./456789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("with directories that need direncoding, hitting length limit")
show('data/x.i/56789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/x.d/56789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/x.hg/5789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("Windows reserved filenames, hitting length limit")
show('data/con/56789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/prn/56789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/aux/56789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/nul/56789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/com1/6789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/com9/6789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/lpt1/6789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')
show('data/lpt9/6789-123456789-123456789-123456789-123456789-'
          'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("non-reserved names, just not hitting limit")
show('data/123456789-123456789-123456789-123456789-123456789-'
          '/com/com0/lpt/lpt0/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12345')

print("hashed path with largest untruncated 1st dir")
show('data/12345678/-123456789-123456789-123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated 1st dir")
show('data/123456789/123456789-123456789-123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest untruncated two dirs")
show('data/12345678/12345678/9-123456789-123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated two dirs")
show('data/123456789/123456789/123456789-123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest untruncated three dirs")
show('data/12345678/12345678/12345678/89-123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated three dirs")
show('data/123456789/123456789/123456789/123456789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest untruncated four dirs")
show('data/12345678/12345678/12345678/12345678/789-123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated four dirs")
show('data/123456789/123456789/123456789/123456789/123456789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest untruncated five dirs")
show('data/12345678/12345678/12345678/12345678/12345678/6789-'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated five dirs")
show('data/123456789/123456789/123456789/123456789/123456789/'
          'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest untruncated six dirs")
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/ed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated six dirs")
show('data/123456789/123456789/123456789/123456789/123456789/'
          '123456789/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest untruncated seven dirs")
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/xxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated seven dirs")
show('data/123456789/123456789/123456789/123456789/123456789/'
          '123456789/123456789/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest untruncated eight dirs")
print("(directory 8 is dropped because it hits _maxshortdirslen)")
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345678/xxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with smallest truncated eight dirs")
print("(directory 8 is dropped because it hits _maxshortdirslen)")
show('data/123456789/123456789/123456789/123456789/123456789/'
          '123456789/123456789/123456789/xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with largest non-dropped directory 8")
print("(just not hitting the _maxshortdirslen boundary)")
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("...adding one truncated char to dir 1..7 won't drop dir 8")
show('data/12345678x/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678x/12345678/12345678/12345678/12345'
          '678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678/12345678x/12345678/12345678/12345'
          '678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678/12345678/12345678x/12345678/12345'
          '678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678/12345678/12345678/12345678x/12345'
          '678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678x/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678x/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path with shortest dropped directory 8")
print("(just hitting the _maxshortdirslen boundary)")
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/123456/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("hashed path that drops dir 8 due to dot or space at end is")
print("encoded, and thus causing to hit _maxshortdirslen")
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/1234./-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/1234 /-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print("... with dir 8 short enough for encoding")
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12./xx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12 /xx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-123456')

print('''Extensions are replicated on hashed paths. Note that
we only get to encode files that end in .i or .d inside the
store. Encoded filenames are thus bound in length.''')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.345.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.345.d')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.34567.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.345678.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789-.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789-1.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789-12.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789-123.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789-1234.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789-12345.i')
show('data/12345678/12345678/12345678/12345678/12345678/12345'
          '678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
          '123456789-12.3456789-12345-ABCDEFGHIJKLMNOPRSTUVWX'
          'YZ-abcdefghjiklmnopqrstuvwxyz-ABCDEFGHIJKLMNOPRSTU'
          'VWXYZ-1234567890-xxxxxxxxx-xxxxxxxxx-xxxxxxxx-xxxx'
          'xxxxx-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwww'
          'wwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww.i')

print("paths outside data/ can be encoded")
show('metadata/dir/00manifest.i')
show('metadata/12345678/12345678/12345678/12345678/12345678/'
          '12345678/12345678/12345678/12345678/12345678/12345678/'
          '12345678/12345678/00manifest.i')