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httppeer: implement command executor for version 2 peer...
httppeer: implement command executor for version 2 peer Now that we have a new API for issuing commands which is compatible with wire protocol version 2, we can start using it with wire protocol version 2. This commit replaces our hacky implementation of _call() with something a bit more robust based on the new command executor interface. We now have proper support for issuing multiple commands per HTTP request. Each HTTP request maintains its own client reactor. The implementation is similar to the one in the legacy wire protocol. We use a ThreadPoolExecutor for spinning up a thread to read the HTTP response in the background. This allows responses to resolve in any order. While not implemented on the server yet, a client could use concurrent.futures.as_completed() with a collection of futures and handle responses as they arrive from the server. The return value from issued commands is still a simple list of raw or decoded CBOR data. This is still super hacky. We will want a rich data type for representing command responses. But at least this commit gets us one step closer to a proper peer implementation. Differential Revision: https://phab.mercurial-scm.org/D3297
Pulkit Goyal - - Load All Authors

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test-encoding-textwrap.t
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/ tests / test-encoding-textwrap.t
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Test text wrapping for multibyte characters
$ mkdir t
$ cd t
define commands to display help text
$ cat << EOF > show.py
> from mercurial import registrar
>
> cmdtable = {}
> command = registrar.command(cmdtable)
>
> # Japanese full-width characters:
> @command(b'show_full_ja', [], '')
> def show_full_ja(ui, **opts):
> u'''\u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051 \u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051 \u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051
>
> \u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051 \u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051 \u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051 \u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051
>
> \u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051\u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051\u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051\u3042\u3044\u3046\u3048\u304a\u304b\u304d\u304f\u3051
> '''
>
> # Japanese half-width characters:
> @command(b'show_half_ja', [], '')
> def show_half_ja(ui, *opts):
> u'''\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79
>
> \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79 \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79
>
> \uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79
> '''
>
> # Japanese ambiguous-width characters:
> @command(b'show_ambig_ja', [], '')
> def show_ambig_ja(ui, **opts):
> u'''\u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb
>
> \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb
>
> \u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb\u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb\u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb\u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb\u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb\u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb\u03b1\u03b2\u03b3\u03b4\u03c5\u03b6\u03b7\u03b8\u25cb
> '''
>
> # Russian ambiguous-width characters:
> @command(b'show_ambig_ru', [], '')
> def show_ambig_ru(ui, **opts):
> u'''\u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438
>
> \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438
>
> \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438\u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438\u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438\u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438\u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438\u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438\u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438
> '''
> EOF
"COLUMNS=60" means that there is no lines which has grater than 58 width
(1) test text wrapping for non-ambiguous-width characters
(1-1) display Japanese full-width characters in cp932
$ COLUMNS=60 hg --encoding cp932 --config extensions.show=./show.py help show_full_ja
hg show_full_ja
\x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf \x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf \x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf (esc)
\x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf \x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf (esc)
\x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf \x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf (esc)
\x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf\x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf\x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf (esc)
\x82\xa0\x82\xa2\x82\xa4\x82\xa6\x82\xa8\x82\xa9\x82\xab\x82\xad\x82\xaf (esc)
(some details hidden, use --verbose to show complete help)
(1-2) display Japanese full-width characters in utf-8
$ COLUMNS=60 hg --encoding utf-8 --config extensions.show=./show.py help show_full_ja
hg show_full_ja
\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 \xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 \xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 (esc)
\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 \xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 (esc)
\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 \xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 (esc)
\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 (esc)
\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a\xe3\x81\x8b\xe3\x81\x8d\xe3\x81\x8f\xe3\x81\x91 (esc)
(some details hidden, use --verbose to show complete help)
(1-3) display Japanese half-width characters in cp932
$ COLUMNS=60 hg --encoding cp932 --config extensions.show=./show.py help show_half_ja
hg show_half_ja
\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 (esc)
\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 (esc)
\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 \xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 (esc)
\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 (esc)
\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9 (esc)
(some details hidden, use --verbose to show complete help)
(1-4) display Japanese half-width characters in utf-8
$ COLUMNS=60 hg --encoding utf-8 --config extensions.show=./show.py help show_half_ja
hg show_half_ja
\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 (esc)
\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 (esc)
\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 \xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 (esc)
\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 (esc)
\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9\xef\xbd\xb1\xef\xbd\xb2\xef\xbd\xb3\xef\xbd\xb4\xef\xbd\xb5\xef\xbd\xb6\xef\xbd\xb7\xef\xbd\xb8\xef\xbd\xb9 (esc)
(some details hidden, use --verbose to show complete help)
(2) test text wrapping for ambiguous-width characters
(2-1) treat width of ambiguous characters as narrow (default)
(2-1-1) display Japanese ambiguous-width characters in cp932
$ COLUMNS=60 hg --encoding cp932 --config extensions.show=./show.py help show_ambig_ja
hg show_ambig_ja
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
(some details hidden, use --verbose to show complete help)
(2-1-2) display Japanese ambiguous-width characters in utf-8
$ COLUMNS=60 hg --encoding utf-8 --config extensions.show=./show.py help show_ambig_ja
hg show_ambig_ja
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
(some details hidden, use --verbose to show complete help)
(2-1-3) display Russian ambiguous-width characters in cp1251
$ COLUMNS=60 hg --encoding cp1251 --config extensions.show=./show.py help show_ambig_ru
hg show_ambig_ru
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
(some details hidden, use --verbose to show complete help)
(2-1-4) display Russian ambiguous-width characters in utf-8
$ COLUMNS=60 hg --encoding utf-8 --config extensions.show=./show.py help show_ambig_ru
hg show_ambig_ru
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
(some details hidden, use --verbose to show complete help)
(2-2) treat width of ambiguous characters as wide
(2-2-1) display Japanese ambiguous-width characters in cp932
$ COLUMNS=60 HGENCODINGAMBIGUOUS=wide hg --encoding cp932 --config extensions.show=./show.py help show_ambig_ja
hg show_ambig_ja
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b \x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
\x83\xbf\x83\xc0\x83\xc1\x83\xc2\x83\xd2\x83\xc4\x83\xc5\x83\xc6\x81\x9b (esc)
(some details hidden, use --verbose to show complete help)
(2-2-2) display Japanese ambiguous-width characters in utf-8
$ COLUMNS=60 HGENCODINGAMBIGUOUS=wide hg --encoding utf-8 --config extensions.show=./show.py help show_ambig_ja
hg show_ambig_ja
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b \xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
\xce\xb1\xce\xb2\xce\xb3\xce\xb4\xcf\x85\xce\xb6\xce\xb7\xce\xb8\xe2\x97\x8b (esc)
(some details hidden, use --verbose to show complete help)
(2-2-3) display Russian ambiguous-width characters in cp1251
$ COLUMNS=60 HGENCODINGAMBIGUOUS=wide hg --encoding cp1251 --config extensions.show=./show.py help show_ambig_ru
hg show_ambig_ru
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 \xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
\xcd\xe0\xf1\xf2\xf0\xee\xe9\xea\xe8 (esc)
(some details hidden, use --verbose to show complete help)
(2-2-4) display Russian ambiguous-width characters in utf-8
$ COLUMNS=60 HGENCODINGAMBIGUOUS=wide hg --encoding utf-8 --config extensions.show=./show.py help show_ambig_ru
hg show_ambig_ru
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 \xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
\xd0\x9d\xd0\xb0\xd1\x81\xd1\x82\xd1\x80\xd0\xbe\xd0\xb9\xd0\xba\xd0\xb8 (esc)
(some details hidden, use --verbose to show complete help)
$ cd ..