command-7z: Add new 7-zip(7zz and 7zzs) project support

[zhuyaliang]

Add new 7Z (7zz and 7zzs) support
gnome-file-roller
#455
#450
#433

The latest version of 7zz/7zzs supports RAR by default, and there is no need to determine whether it supports RAR

gboolean available_7zip = is_program_available ("7zz", check_command) || is_program_available ("7zzs", check_command);
if (! check_command || available_7zip || g_file_test ("/usr/lib/p7zip/Codecs/Rar29.so", G_FILE_TEST_EXISTS) || g_file_test ("/usr/lib/p7zip/Codecs/Rar.so", G_FILE_TEST_EXISTS)
     || g_file_test ("/usr/libexec/p7zip/Codecs/Rar29.so", G_FILE_TEST_EXISTS) || g_file_test ("/usr/libexec/p7zip/Codecs/Rar.so", G_FILE_TEST_EXISTS))
    capabilities |= FR_COMMAND_CAN_READ;
}

[raveit65]

Hmm, is 7zz supported by common linux distros. I see only pzip in fedora 38 (just released).

[root@mother ~]# dnf search 7z
Last metadata expiration check: 1:05:30 ago on Fri Apr 14 17:47:41 2023.
========================================= Name & Summary Matched: 7z =========================================
p7zip-gui.x86_64 : 7zG - 7-Zip GUI version
p7zip-plugins.x86_64 : Additional plugins for p7zip
============================================== Name Matched: 7z ==============================================
p7zip.x86_64 : Very high compression ratio file archiver
p7zip-doc.noarch : Manual documentation and contrib directory
============================================ Summary Matched: 7z =============================================
golang-github-kjk-lzmadec.x86_64 : Decompress .7z files in Go using 7z executable
golang-github-kjk-lzmadec-devel.noarch : Decompress .7z files in Go using 7z executable

[zhuyaliang]

@raveit65 Manual download and installation required 7zz

[raveit65]

Ok, but can we open rar files with engrampa and p7zip after this change?
Downloading and installing a sub-program by hand seems not comfortable.

[zhuyaliang]

@raveit65

Ok, but can we open rar files with engrampa and p7zip after this change?

Can decompress rar normally

[mate@mouse eom]$ 7zzs l -- /tmp/share.rar

7-Zip (z) 22.01 (x64) : Copyright (c) 1999-2022 Igor Pavlov : 2022-07-15
 64-bit locale=zh_CN.UTF-8 Threads:2, ASM

Scanning the drive for archives:
1 file, 10983 bytes (11 KiB)

Listing archive: /tmp/share.rar

--
Path = /tmp/share.rar
Type = Rar5
Physical Size = 10983
Solid = -
Blocks = 4
Encrypted = -
Multivolume = -
Volumes = 1

   Date      Time    Attr         Size   Compressed  Name
------------------- ----- ------------ ------------  ------------------------
2021-03-13 18:06:56 ....A         8274         2619  user-window.c
2021-03-13 18:06:56 ....A         2307          927  user-window.h
2022-11-29 19:57:13 ....A         1148          522  update_auto_login_layout.patch
2021-03-17 00:11:51 ....A        34447         6590  user-group-window.c
------------------- ----- ------------ ------------  ------------------------
2022-11-29 19:57:13              46176        10658  4 files

Downloading and installing a sub-program by hand seems not comfortable.

There are currently no available installation packages available, but some users have chosen to manually install them, so we should add support

[lukefromdc]

Support on Debian made possible by compiling without unrar support per DSFG guidelines

[lukefromdc]

With this PR installed and Debian's 7-zip package installed, I can create a .7z but not a .tar.7z archive, the latter regardless of attempting to compress one file or a batch. Compressing to a .7z archive works fine with a batch of files. If this is the intended behavior tar.7z should be removed from the list of options shown in caja-engrampa's "compress" menu

[raveit65]

I can open .7z archive but i can't create a archive. No idea what's wrong here.

[raveit65]

@zhuyaliang
My friend adding some comments to code like in file-roler would really help to understand the PR.
https://gitlab.gnome.org/GNOME/file-roller/-/commit/b798bbd96d3777c20026f1dc2d3e15ecb5bc853d#0687cc92286b7cb5f44c7697bdbe5d00dcad598c_180_180

fr_command_7z_begin_command (FrCommand *comm)
{
	if (_g_program_is_in_path ("7z"))
	// Modern 7-Zip by the original author.
	// Statically linked from a binary distribution, almost guaranteed to work.
	if (_g_program_is_in_path ("7zzs"))
		fr_process_begin_command (comm->process, "7zzs");
	// Dynamically linked from either binary or source distribution.
	else if (_g_program_is_in_path ("7zz"))
		fr_process_begin_command (comm->process, "7zz");
	// Legacy p7zip project.
	else if (_g_program_is_in_path ("7z"))
		fr_process_begin_command (comm->process, "7z");
	else if (_g_program_is_in_path ("7za"))
		fr_process_begin_command (comm->process, "7za");

after reading file-roller commit it was clear that
a) the commit support both programs (p7zip and 7zz)
b) p7zip is unmaintained and 7zz is the replacement
c) distros like fedora/redhat family can use p7zip

I would be helpful to add more comments to PR like in file-roller.
Well, i tested your Commit with p7zip and everything works well (extracting rar, creating .7z and tar.7z archives).
So from my (fedora maintainer) point of view the commit works and i will approve it.

[raveit65]

LGTM

[zhuyaliang]

@lukefromdc Code update, please test again

[lukefromdc]

With the latest changes compressing to .7z produces an archive containing the files chosen, compressing to tar.7z produced a .tar file compressed with 7zip, which I am assuming to be the intended behavior and is certainly functional. Looks good to go