Package: emacs;
Reported by: "Trent W. Buck" <trentbuck <at> gmail.com>
Date: Tue, 14 Dec 2021 04:58:02 UTC
Severity: wishlist
Found in version 27.1
Message #28 received at 52477 <at> debbugs.gnu.org (full text, mbox):
From: "Trent W. Buck" <trentbuck <at> gmail.com> To: Eli Zaretskii <eliz <at> gnu.org> Cc: stefan <at> marxist.se, 52477 <at> debbugs.gnu.org, Michael Albinus <michael.albinus <at> gmx.de> Subject: Re: bug#52477: 27.1; .crx and .crx3 are zip files Date: Wed, 22 Dec 2021 14:50:43 +1100
Eli Zaretskii wrote:
> > From: Michael Albinus <michael.albinus <at> gmx.de>
> > Cc: stefan <at> marxist.se, trentbuck <at> gmail.com, 52477 <at> debbugs.gnu.org
> > Date: Thu, 16 Dec 2021 12:59:01 +0100
> >
> > > If the file doesn't follow the PKZip spec in the initial signature,
> > > who knows what else in that spec doesn't it follow? The ZIP spec has
> > > a lot of special rules and formatting requirements, so if a file
> > > doesn't follow them, how can we support it without knowing its exact
> > > format specification?
> >
> > ".crx" files are Chrome Extensions, as shown by Stefan. They are
> > specified, see for example <https://developer.chrome.com/docs/extensions/reference/>.
> >
> > Personally, I have no strong opinion whether we shall support them.
>
> Me neither, but if someone wants to extend arc-mode.el to support
> those extension, that would be welcome, I think. My point is that we
> cannot just add this file type before we implement those extensions.
FTR, as the end user, I don't really care HOW it's implemented.
I also don't really care about editing, i.e. read-only support is fine.
I have a similar "eyeball the result" workflow for .deb using
/usr/share/emacs/site-lisp/elpa-src/debian-el-37/deb-view.el
Another case of "it's a zip, but" is the .pyz, which
has an (optional) shebang before the PK:
bash5$ mkdir MyCoolApp
bash5$ touch MyCoolApp/__init__.py
bash5$ echo 'print("Hello, World!")' >MyCoolApp/__main__.py
bash5$ python3 -m zipapp --compress --python=/usr/bin/python3 MyCoolApp
bash5$ ./MyCoolApp.pyz
Hello, World!
bash5$ head -n1 MyCoolApp.pyz
#!/usr/bin/python3
bash5$ file MyCoolApp.pyz
MyCoolApp.pyz: Zip archive data, made by v2.0 UNIX, extract using at least v2.0, last modified Tue Jun 10 02:57:41 2014, uncompressed size 23, method=deflate
bash5$ emacs MyCoolApp.pyz
<Emacs does not understand it>
Someone mentioned libarchive, originally from BSD, which provides a
standard interface to EVERY(ish) archive and compression format.
Is it reasonable for emacs to just chuck out arc-mode (and tar-mode
and jka-compr) and instead just use libarchive?
It's already used by vlc and a lot of GNOME stuff.
libarchive already understands both .pyz and .crx3 files, at least for reading:
bash5$ bsdtar -vtf MyCoolApp.pyz
-rw-r--r-- 0 0 0 23 Dec 22 14:33 __main__.py
-rw-r--r-- 0 0 0 0 Dec 22 14:33 __init__.py
bash5$ bsdtar -vtf jamhcnnkihinmdlkakkaopbjbbcngflc_99.0.4764.2_all_nfh7crk5nxg3omjxfwx5cuhrz4.crx3
-rw-rw-r-- 0 0 0 3484 Dec 13 12:34 hyph-und-ethi.hyb
-rw-rw-r-- 0 0 0 2712 Dec 13 12:34 hyph-tk.hyb
-rw-rw-r-- 0 0 0 703 Dec 13 12:34 hyph-te.hyb
-rw-rw-r-- 0 0 0 554 Dec 13 12:34 hyph-ta.hyb
-rw-rw-r-- 0 0 0 6631 Dec 13 12:34 hyph-sl.hyb
-rw-rw-r-- 0 0 0 1414 Dec 13 12:34 hyph-pt.hyb
-rw-rw-r-- 0 0 0 607 Dec 13 12:34 hyph-pa.hyb
-rw-rw-r-- 0 0 0 647 Dec 13 12:34 hyph-or.hyb
-rw-rw-r-- 0 0 0 145263 Dec 13 12:34 hyph-nn.hyb
-rw-rw-r-- 0 0 0 145263 Dec 13 12:34 hyph-nb.hyb
-rw-rw-r-- 0 0 0 687 Dec 13 12:34 hyph-mr.hyb
-rw-rw-r-- 0 0 0 5142 Dec 13 12:34 hyph-mn-cyrl.hyb
-rw-rw-r-- 0 0 0 776 Dec 13 12:34 hyph-ml.hyb
-rw-rw-r-- 0 0 0 1839 Dec 13 12:34 hyph-la.hyb
-rw-rw-r-- 0 0 0 711 Dec 13 12:34 hyph-kn.hyb
-rw-rw-r-- 0 0 0 605 Dec 13 12:34 hyph-hy.hyb
-rw-rw-r-- 0 0 0 317251 Dec 13 12:34 hyph-hu.hyb
-rw-rw-r-- 0 0 0 3031 Dec 13 12:34 hyph-hr.hyb
-rw-rw-r-- 0 0 0 687 Dec 13 12:34 hyph-hi.hyb
-rw-rw-r-- 0 0 0 655 Dec 13 12:34 hyph-gu.hyb
-rw-rw-r-- 0 0 0 35824 Dec 13 12:34 hyph-ga.hyb
-rw-rw-r-- 0 0 0 8165 Dec 13 12:34 hyph-fr.hyb
-rw-rw-r-- 0 0 0 665 Dec 13 12:34 hyph-eu.hyb
-rw-rw-r-- 0 0 0 21421 Dec 13 12:34 hyph-et.hyb
-rw-rw-r-- 0 0 0 14995 Dec 13 12:34 hyph-es.hyb
-rw-rw-r-- 0 0 0 59802 Dec 13 12:34 hyph-en-us.hyb
-rw-rw-r-- 0 0 0 46607 Dec 13 12:34 hyph-en-gb.hyb
-rw-rw-r-- 0 0 0 120218 Dec 13 12:34 hyph-de-ch-1901.hyb
-rw-rw-r-- 0 0 0 120412 Dec 13 12:34 hyph-de-1996.hyb
-rw-rw-r-- 0 0 0 121393 Dec 13 12:34 hyph-de-1901.hyb
-rw-rw-r-- 0 0 0 6967 Dec 13 12:34 hyph-da.hyb
-rw-rw-r-- 0 0 0 35913 Dec 13 12:34 hyph-cy.hyb
-rw-rw-r-- 0 0 0 52842 Dec 13 12:34 hyph-cu.hyb
-rw-rw-r-- 0 0 0 703 Dec 13 12:34 hyph-bn.hyb
-rw-rw-r-- 0 0 0 3467 Dec 13 12:34 hyph-bg.hyb
-rw-rw-r-- 0 0 0 6098 Dec 13 12:34 hyph-be.hyb
-rw-rw-r-- 0 0 0 703 Dec 13 12:34 hyph-as.hyb
-rw-r--r-- 0 0 0 178 Dec 13 12:34 manifest.json
drwxrwxr-x 0 0 0 0 Dec 13 12:34 _metadata/
-rw-rw-r-- 0 0 0 5698 Dec 13 12:34 _metadata/verified_contents.json
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