https://issues.dlang.org/show_bug.cgi?id=18649

Seb <greensunny12@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |greensunny12@gmail.com

--- Comment #1 from Seb <greensunny12@gmail.com> ---
I was shocked a bit about this because I thought libcurl4 doesn't exist in Ubuntu and is currently only available in experimental in Debian:

https://packages.debian.org/experimental/libcurl4 https://packages.ubuntu.com/search?keywords=libcurl&searchon=names&suite=artful&section=all

The binary library is called libcurl3 (the API/development packages is
libcurl4-dev)

https://askubuntu.com/questions/469360/what-is-the-difference-between-libcurl3-and-libcurl4

However, I tried this myself in Docker and I can reproduce this:

---
root@84fd31deb36c:/# apt-get install libcurl3
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 dmd : Depends: libc6-dev but it is not going to be installed
       Depends: gcc but it is not going to be installed
 libcurl3 : Depends: libssl1.0.0 (>= 1.0.2~beta3) but it is not going to be
installed
            Conflicts: libcurl4 but 7.58.0-2ubuntu3 is to be installed
 libcurl4 : Conflicts: libcurl3 but 7.58.0-2ubuntu2 is to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or
specify a solution).
---

---
root@84fd31deb36c:/# apt-get install libcurl4
Reading package lists... Done
Building dependency tree
Reading state information... Done
libcurl4 is already the newest version (7.58.0-2ubuntu3).
libcurl4 set to manually installed.
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 dmd : Depends: libc6-dev but it is not going to be installed
       Depends: gcc but it is not going to be installed
       Depends: libcurl3 but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or
specify a solution).
---

At least it seems like dmd isn't the only application: https://bugs.launchpad.net/ubuntu/+source/curl/+bug/1754294


BTW the file that creates the DEB ball is here:

https://github.com/dlang/installer/blob/master/linux/dmd_deb.sh#L347

I'm not sure what's the best fix for this as libcurl4 doesn't exist in Debian (and the DEB ball is supposed to be general-purpose).

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https://issues.dlang.org/show_bug.cgi?id=18649

--- Comment #2 from Seb <greensunny12@gmail.com> ---
Background info on the rename:

https://launchpad.net/ubuntu/+source/curl/7.58.0-2ubuntu2

 Rename libcurl3 to libcurl4, because libcurl exposes an SSL_CTX via
    CURLOPT_SSL_CTX_FUNCTION, and this object changes incompatibly between
    openssl 1.0 and openssl 1.1.

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https://issues.dlang.org/show_bug.cgi?id=18649

--- Comment #3 from Seb <greensunny12@gmail.com> ---
BTW @Alex: as another an alternative until this is resolved, you might want to try the install script:

https://dlang.org/install.html

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https://issues.dlang.org/show_bug.cgi?id=18649

--- Comment #4 from Alex Whitman <alex.whitman@durham.ac.uk> ---
My 18.04 install was done just before curl was moved to libcurl4 so for now I'm holding back the upgrade of those packages, meaning I was able to install the 2.079.0 deb.

The solution might be as simple as changing the dependency to libcurl3 OR libcurl4 but I don't know the internals at all to know if that would work.

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https://issues.dlang.org/show_bug.cgi?id=18649

greenify <greeenify@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |greeenify@gmail.com

--- Comment #5 from greenify <greeenify@gmail.com> ---
The "official" deb ball is supposed to run on Debian too, so probably the only
solution for a universal deb ball would be to drop the dependency on libcurl.
It's only used for std.net.curl and dynamically loaded when needed.
The d-apt registry should be able to set the dependency correctly though.

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https://issues.dlang.org/show_bug.cgi?id=18649

--- Comment #6 from Seb <greensunny12@gmail.com> ---
An attempt at fixing it by simply making libcurl optional (it's only needed for std.net.curl) https://github.com/dlang/installer/pull/314

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https://issues.dlang.org/show_bug.cgi?id=18649

Martin Nowak <code@dawg.eu> changed:

           What    |Removed                     |Added
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                 CC|                            |code@dawg.eu

--- Comment #7 from Martin Nowak <code@dawg.eu> ---
- The libcurl dependency should be demoted to recommended (installed by default) or suggested, atm. it's still a dependency.

- It's confusing to see libcurl3 as dependency and libcurl4-openssl-dev as
suggestion.

https://github.com/dlang/installer/blob/47830a15d1a576b683c92b4bb4adc4a1d83a2b5d/linux/dmd_deb.sh#L347-L348
  Has anyone ever succeeded to install that with `-o
APT::Install-Suggests="true"` or `--install-suggests`?

- It's a pity that debian doesn't have a meta-package for libcurl, but I'd research how other packages resolved this issue (libcurl-ocaml depends on libcurl3-gnutls while libcurl-ocaml-dev depends on libcurl4-gnutls-dev).

- Use an alternative package name `libcurl4 | libcurl3` to support installations without libcurl4 availability. Assuming that all OSes with libcurl4 switch to that by default, otherwise you'd be back to the conflict.

So how about:
DEPENDS='libc6, libc6-dev, gcc, libgcc1, libstdc++6'
RECOMMENDS='libcurl4 | libcurl3'
SUGGESTS='libcurl4-openssl-dev, gcc-multilib'

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https://issues.dlang.org/show_bug.cgi?id=18649

--- Comment #8 from Alex Whitman <alex.whitman@durham.ac.uk> ---
I've given Martin's suggestion of using Recommends a go and it appears to work.
 The steps I took were:

- Purge existing dmd installation
- Upgrade curl, bringing in libcurl4, removing libcurl3
- Unpacked dmd_2.079.0-0_amd64.deb
- Edited the control file with the changes to the Depends section and added the
Recommends section.
- Repacked the .deb
- Installed the .deb

The installation worked but I don't have anything that uses std.net.curl to test.

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https://issues.dlang.org/show_bug.cgi?id=18649

--- Comment #9 from github-bugzilla@puremagic.com ---
Commits pushed to master at https://github.com/dlang/installer

https://github.com/dlang/installer/commit/4790451e11f3891cf74efa54b9e1b2e29fd4eaa9 fix Issue 18649 - curl on Ubuntu 18.04 depends on libcurl4, ...

... .deb installer depends on libcurl3

- depend on libcurl4 | libcurl3 alternative
- degrading libcurl from dependency to recommends would be welcome,
  but does not work because recommendations are not installed for raw
  .deb packages (--fix-broken only installs dependencies).
  `dpkg -i dmd_2.079.1-0_amd64.deb && apt-get --fix-broken install`
- also add suggested libcurl-dev alternative

https://github.com/dlang/installer/commit/8233177ccc37c4ca5e6a8cfdc39b0a06ece5b2d7 Merge pull request #318 from MartinNowak/test_pkg_install

fix Issue 18649 - curl on Ubuntu 18.04 depends on libcurl4, ...

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https://issues.dlang.org/show_bug.cgi?id=18649

github-bugzilla@puremagic.com changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

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