Make it easier to install? about postgrex HOT 8 CLOSED

Hey @dbenamy, we are sorry about that. We released postgrex depending on elixir-dev by accident and that is what is causing pain.

Please try using this commit: ec804cb

from postgrex.

Thanks for the quick reply!

I changed my mix.exs to have

  defp deps do
    [
      {:phoenix, github: "phoenixframework/phoenix"},
      {:postgrex, "0.4.2", github: "ericmj/postgrex", tag: "ec804cb"}, # this revision works with elixir 0.13.0
      {:ecto, github: "elixir-lang/ecto"}
    ]
  end

ran

mix deps.clean --all
mix deps.get
mix deps.update postgrex

which gave normal looking output, and then

mix compile
Unchecked dependencies for environment dev:
* postgrex (git://github.com/ericmj/postgrex.git)
  the dependency postgrex in mix.exs is overriding a child dependency:

  > In mix.exs:
    {:postgrex, "0.4.2", [git: "git://github.com/ericmj/postgrex.git", tag: "ec804cb"]}

  > In deps/ecto/mix.exs:
    {:postgrex, "~> 0.4.0", [git: "git://github.com/ericmj/postgrex.git", optional: true]}

  Ensure they match or specify one of the above in your Statman.Mixfile deps and set `override: true`
** (Mix) Can't continue due to errors on dependencies

Am I missing something?

from postgrex.

You need to add override: true, like this: {:postgrex, "0.4.2", github: "ericmj/postgrex", tag: "ec804cb", override: true}.

from postgrex.

That did it, thanks!!

Why does the override setting exist? If the version and/or tag are given, I would think that it's clear what the dev wants. But I'm really new at all this so I'm probably missing some important piece :-)

from postgrex.

@dbenamy the override exists because you may accidentally replace a dependency specified below. The override is to make sure you are defining it exactly because you want to override something.

from postgrex.

Got it. Thanks for the explanation.

Want me to take a stab at a patch which updates the error message to
explain this and how to solve it?

On Thu, Apr 24, 2014 at 12:21 PM, José Valim [email protected]:

@dbenamy https://github.com/dbenamy the override exists because you may
accidentally replace a dependency specified below. The override is to make
sure you are defining it exactly because you want to override something.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/12#issuecomment-41300389
.

from postgrex.

@dbenamy The error message already includes the solution. From what you pasted: "Ensure they match or specify one of the above in your Statman.Mixfile deps and set override: true".

Do you think it should be more clear?

from postgrex.

Oh :-) Now that I read it more carefully, I totally understand what it's saying. Maybe I was too new to elixir or too tired to process it at the time.

If I was going to rewrite the message though, I might have it say something like this

$ mix compile
** (Mix) Can't continue due to errors on dependencies
"projdir/mix.exs" has this dependency:
    {:postgrex, "0.4.2", [git: "git://github.com/ericmj/postgrex.git", tag: "ec804cb"]}
which conflicts with another dependency in "projdir/deps/ecto/mix.exs":
    {:postgrex, "~> 0.4.0", [git: "git://github.com/ericmj/postgrex.git", optional: true]}

Normally, you should change "projdir/mix.exs" to specify the same version as ecto, for example:
    {:postgrex, "~> 0.4.0", [git: "git://github.com/ericmj/postgrex.git"]}
If you really want to use the version in "projdir/mix.exs", add the override setting like this:
    {:postgrex, "0.4.2", [git: "git://github.com/ericmj/postgrex.git", tag: "ec804cb", override: true]}

But it's probably not too important.

from postgrex.