I am trying to list the packages that are essential to install Ruby. For example, on Archlinux:
$ pacman -Si ruby
Repository : extra
Name : ruby
Version : 2.7.1-3
Description : An object-oriented language for quick and easy programming
Architecture : x86_64
URL : https://www.ruby-lang.org/en/
Licenses : BSD custom
Groups : None
Provides : None
Depends On : gdbm openssl libffi libyaml gmp zlib rubygems ruby-irb
Optional Deps : ruby-docs: Ruby documentation
tk: for Ruby/TK
Conflicts With : None
Replaces : None
Download Size : 3.30 MiB
Installed Size : 13.34 MiB
Packager : Anatol Pomozov <[email protected]>
Build Date : Sat 22 Aug 2020 03:46:33 IST
Validated By : MD5 Sum SHA-256 Sum Signature
In other words, Depends On : gdbm openssl libffi libyaml gmp zlib rubygems is what I want in Ubuntu.
On Ubuntu, I am trying to do this:
$ apt-cache show ruby
The output is:
Package: ruby
Architecture: amd64
Version: 1:2.5.1
Multi-Arch: allowed
Priority: optional
Section: interpreters
Source: ruby-defaults
Origin: Ubuntu
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Antonio Terceiro <[email protected]>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 37
Provides: irb, rdoc, rubygems
Depends: ruby2.5
Suggests: ri, ruby-dev
Conflicts: ruby-activesupport-2.3, ruby-activesupport-3.2
Breaks: apt-listbugs (<< 0.1.6), rbenv (<= 0.4.0-1), ruby-debian (<< 0.3.8+b3), ruby-switch (<= 0.1.0)
Replaces: irb, rdoc, rubygems
Filename: pool/main/r/ruby-defaults/ruby_2.5.1_amd64.deb
Size: 5712
MD5sum: 4fbbfcf2431190a889f2430ffd017110
SHA1: 2b56994915b61fe6009613e0b879d9de16699206
SHA256: b01fd79a656f1e36542d1dd1046713ffb2d5f29902e433d06884333fcb151488
Homepage: http://www.ruby-lang.org/
Description-en: Interpreter of object-oriented scripting language Ruby (default version)
Ruby is the interpreted scripting language for quick and easy
object-oriented programming. It has many features to process text
files and to do system management tasks (as in perl). It is simple,
straight-forward, and extensible.
.
This package is a dependency package, which depends on Debian's default Ruby
version (currently v2.5).
Description-md5: 9b1885fba57cb2974ce14902f85d3e27
Task: kubuntu-desktop, kubuntu-full
Supported: 5y
It doesn't list packages like openssl or zlib as dependency. But when I try to purge openssl (this is dangerous, and I just ran the command and pressed the N key to skip removal), it also lists ruby in the removal list. That means Ruby depends on OpenSSL.
I have also followed answers like this, which lists the packages that depends on ruby, not the packages ruby depends on.
If you ask why is that important, the reason is I am writing a guide how to compile Ruby with various optflags (CFLAGS) for performance, mainly for Arch. Then wanted to add Ubuntu as well, and I didn't get a complete dependency list which is required to build Ruby. I can't list the arch packages, because Ubuntu has some different and weird names. Like calling base-devel as build-essential, etc.
So what's the way to list packages?
Use apt-rdepends from the eponymous package:
$ apt-rdepends ruby
ruby
Depends: ruby2.7
ruby2.7
Depends: libc6 (>= 2.4)
Depends: libruby2.7 (>= 2.7.0~preview1)
Depends: rubygems-integration (>= 1.8)
libc6
Depends: libcrypt1
Depends: libgcc-s1
libcrypt1
Depends: libc6 (>= 2.25)
libgcc-s1
Depends: gcc-10-base (= 10.2.0-6)
Depends: libc6 (>= 2.14)
gcc-10-base
...
ca-certificates
Depends: debconf (>= 0.5)
Depends: debconf-2.0
Depends: openssl (>= 1.1.1)
openssl
Depends: libc6 (>= 2.15)
Depends: libssl3 (>= 3.0.0~~alpha1)
libssl3
Depends: debconf (>= 0.5)
Depends: debconf-2.0
Depends: libc6 (>= 2.25)
Since you’re interested in building the package, you might need the -b option which will recursively list the package’s build-dependencies.
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments