Build and run issues on a Mac

[hubert-da]

Hi, I'd like to report some errors that I ran into on my Mac while going through the getting started guide. Maybe someone will find it useful.

Hash mismatches for go modules

Error

error: hash mismatch in fixed-output derivation '/nix/store/0jgjkfkdw76dkg6vvs2m5p5qw820ljvp-cli-latest-go-modules.drv':
         specified: sha256-NJOPtpqMUEe0F2TIizrUi40l25e0t0eiQr/Y0acQr4I=
            got:    sha256-JPfNPmp+ufZsrCjl7lxdSFefn9SChbIV/8Og6ykOb/Q=
error: 1 dependencies of derivation '/nix/store/s4b6msbg6lysz1k3vhlkz5xva7pi9jfx-cli-latest.drv' failed to build
error: 1 dependencies of derivation '/nix/store/crmx9q265fi88iwx603kqgp3zk7p7lwr-detsys-latest.drv' failed to build

Workaround

Use the "got" hashes.

Comments

Not sure why those have changed. Either I'm using a different version of go or it's platform-dependent. buildGoModule seems to account for that (at least to some extent) with proxyVendor (see here), however, I'm not a go nor nix expert. I also checked all minor versions between 1.15 and 1.19 and I was getting different hashes each time.

Missing go.sum entries

Errors

go: [github.com/symbiont-io/detsys-testkit/src/executor@v0.0.0-00010101000000-000000000000](http://github.com/symbiont-io/detsys-testkit/src/executor@v0.0.0-00010101000000-000000000000) requires
	[go.uber.org/zap@v1.20.0](http://go.uber.org/zap@v1.20.0): missing go.sum entry; to add it:
	go mod download go.uber.org/zap

missing go.sum entry for module providing package [go.uber.org/atomic](http://go.uber.org/atomic) (imported by [go.uber.org/zap](http://go.uber.org/zap)); to add:
	go get go.uber.org/zap@v1.20.0

Fix (as above)

go mod download go.uber.org/zap
go get go.uber.org/zap@v1.20.0

Segmentation fault when running tests

Error

--- FAIL: TestRegister1 (0.00s)
panic: Binary was compiled with 'CGO_ENABLED=0', go-sqlite3 requires cgo to work. This is a stub
	panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x114d41e]

Workaround

Running export CGO_ENABLED=1 just before the tests seems to fix the issue. I'm confused by this, as the default.nix files contain the correct export, so everything should have been built correctly.

Missing dependency

Error

Error occured during analysis:
exit status 1
Exception in thread "main" java.util.concurrent.ExecutionException: java.io.IOException: Cannot run program "dot": error=2, No such file or directory

Fix

nix-env -iA nixpkgs.graphviz (you may want to add it to your Nix dependencies somewhere)

Other errors

... that could potentially find their place in some troubleshooting guide or at least can stay here for reference

Nix search path issue

Error

file 'nixpkgs/lib' was not found in the Nix search path (add it using $NIX_PATH or -I), at /nix/store/f0my6g5a4d353j7h3771baqfn96f1a3v-gitignore-src/default.nix:1:16

Fix

source ~/.nix-profile/etc/profile.d/nix.sh && nix-channel --update (trail and error from various threads and the combination of these 2 seems to work)

Too many open files

Error

opening directory '/nix/store/iyxfjv4v79i38nj2qyr8m5rblp23affm-maven-compiler-plugin-3.1.jar': Too many open files

Fix

ulimit -n 10240 (obviously)