Go modules issues

Help
1

I’m trying to set up a dev environment for aerc, and I started with the derivation in master, which works perfectly, provided I call it with a default.nix like this:

with import <nixpkgs> {}; \
let 
  buildGo112Module = callPackage <nixpkgs/pkgs/development/go-modules/generic> {
   go = buildPackages.go_1_12; }; 
  aerc = callPackage ./aerc.nix { go=go_1_12; buildGoModule=buildGo112Module; }; 
in aerc

(where aerc.nix is the derivation in master).

I have two problems.

nix-build

I tried cloning the repository and doing a nix-build with the same setup (except for src=./.;), and I get this:

go build \ -ldflags "-X                                                                                                                                        main.Prefix=/nix/store/yi3xzhbidi22rj6kq9k7hj9vrwdjwnjf-aerc-0.2.1 \ 
  -X main.ShareDir=/nix/store/yi3xzhbidi22rj6kq9k7hj9vrwdjwnjf-aerc-0.2.1/share/aerc \ 
  -X main.Version=0.2.1" \
   -o aerc
go: finding github.com/go-ini/ini v1.44.0 go: finding github.com/emersion/go-imap v1.0.0 
go: finding github.com/martinlindhe/base36 v1.0.0
go: finding github.com/stretchr/testify v1.3.0 go: finding git.sr.ht/~sircmpwn/tcell v0.0.0-20190807054800-3fdb6bc01a50 
go: git.sr.ht/~sircmpwn/tcell@v0.0.0-20190807054800-3fdb6bc01a50: open /nix/store/17a5g4bn7754n9312rvy90wj0jvkvrs6-aerc-0.2.1-go-modules/git.sr.ht/~sircmpwn/tcell/@v/v0.0.0-20190807054800-3fdb6bc01a50.info: no such file or directory
go: finding github.com/zenhack/go.notmuch v0.0.0-20190726231123-3d59f87d986e 
go: github.com/zenhack/go.notmuch@v0.0.0-20190726231123-3d59f87d986e: open /nix/store/17a5g4bn7754n9312rvy90wj0jvkvrs6-aerc-0.2.1-go-modules/github.com/zenhack/go.notmuch/@v/v0.0.0-20190726231123-3d59f87d986e.info: no such file or directory

So it seems that go modules from github are being installed normally, but those from different repositories are erroring.
How can I solve that?

Going back to an earlier commit, between the one in the original derivation and master, where the packages were all in github, nix-build runs successfully.

nix-shell

Also, if I do nix-shell and then fetchPhase, configurePhase, in the buildPhase I get:

flags: SHELL=/nix/store/mn4jdnhkz12a6yd6jg6wvb4mqpxf8q1f-bash-interactive-4.4-p23/bin/bash go build \ 
  -ldflags "-X main.Prefix=/usr/local \ 
   -X main.ShareDir=/usr/local/share/aerc \ 
   -X main.Version=0.2.1" \ 
   -o aerc 
go: github.com/emersion/go-maildir@v0.0.0-20190727102040-941194b0ac70: mkdir /nix/store/y1mgms38574a3w6jpm8bpa762j5wn9xg-go-1.12.1/share/go/pkg/mod: read-only file system 
go: github.com/kyoh86/xdg@v1.0.0: mkdir /nix/store/y1mgms38574a3w6jpm8bpa762j5wn9xg-go-1.12.1/share/go/pkg/mod: read-only file system 
go: github.com/smartystreets/goconvey@v0.0.0-20190710185942-9d28bd7c0945: mkdir /nix/store/y1mgms38574a3w6jpm8bpa762j5wn9xg-go-1.12.1/share/go/pkg/mod: read-only file system 
go: github.com/go-ini/ini@v1.44.0: mkdir /nix/store/y1mgms38574a3w6jpm8bpa762j5wn9xg-go-1.12.1/share/go/pkg/mod: read-only file system

Is this an issue of setting $GOPATH? But why does it work in nix-build and not here?

2

Could you please reformat the logs of nix-build and nix-shell? Where the domain git.sr.ht is used, It’s almost unviewable unless one scrolls to the right… It’s also not very clear because of this which message came out first.

3

Wow, sorry, I didn’t notice that copy and paste mess.

I believe it was something like this, but I’m on a different PC now.

4

Never mind, the first problem was just me not having changed the modSha256.

Still don’t know what to do about the second one, though.

5

And this fixed the second problem too, but I don’t know why

with import <nixpkgs> {};
let 
  buildGo112Module = callPackage ~/src/nixpkgs/pkgs/development/go-modules/generic {
    go = buildPackages.go_1_12;
  };
  aerc = callPackage ./aerc.nix { go=go_1_12; buildGoModule=buildGo112Module; };
in 
  stdenv.mkDerivation {
  name = "build";
  buildInputs = aerc.buildInputs ++ aerc.nativeBuildInputs ++ [];
  shellHook=''
        export GOCACHE=$TMPDIR/go-cache
      export GOPATH="$TMPDIR/go"
      mkdir -p "''${GOPATH}/pkg/mod/cache/download"
      '';
}
6

I fixed the nix-shell problem like this: