`go run` fails

[joshlf]

Crate name: mundane
Build failure link: https://docs.rs/crate/mundane/0.4.4/builds/357678

Additional details: Based on the following log output, I believe what's happening is that, since the GOCACHE environment variable is not set, go run is defaulting to $HOME/.cache, and I'm guessing that $HOME is set to /. This means that go run tries creating /.cache, which it doesn't have permission to do. See here for more details on Go's build cache.

[INFO] [stderr]   cd /opt/rustwide/workdir/boringssl/boringssl/crypto/err && /usr/bin/go run err_data_generate.go > /opt/rustwide/target/debug/build/mundane-6275d256bd1e392c/out/boringssl/build_1/crypto/err_data.c
[INFO] [stderr]   failed to initialize build cache at /.cache/go-build: mkdir /.cache: permission denied

[jyn514]

Most of the build environment is read-only. You could try setting GOCACHE to a subdirectory of the target directory in your build script.

[joshlf]

My thinking is that it would make sense to set GOCACHE to some reasonable value for all docs.rs builds; I can't think of a reason that it would need to be specific to Mundane?

[jyn514]

Hmm, I wonder if it makes sense rather than fixing GOCACHE specifically to set HOME to a temporary directory.

[joshlf]

That makes sense too, although I'd be worried about that having more wide-ranging implications (much more software uses HOME than GOCACHE), so I feel like just setting GOCACHE would be safer.

[jyn514]

Note that this is blocked on a rustwide update one way or another: #1278

[joshlf]

I'm not sure I understand why the change we're discussing here is blocked on #1278? Is it just that all docs.rs deployments are blocked on it?

[jyn514]

Docs.rs doesn't set any of these variables itself, they're set through rustwide. Rustwide 0.12 has switched to tokio 1.0, and I'm not willing to have over 600 dependencies just to fix this bug.

[joshlf]

Ah, I understand, gotcha.

[jyn514]

@joshlf go fails even with HOME set to a writeable directory:

2021/03/24 12:21:02 [INFO] rustwide::cmd: [stderr]   [37/272] Generating err_data.c
2021/03/24 12:21:02 [INFO] rustwide::cmd: [stderr]   FAILED: crypto/err_data.c 
2021/03/24 12:21:02 [INFO] rustwide::cmd: [stderr]   cd /opt/rustwide/workdir/boringssl/boringssl/crypto/err && /usr/bin/go run err_data_generate.go > /opt/rustwide/target/debug/build/mundane-6275d256bd1e392c/out/boringssl/build_1/crypto/err_data.c
2021/03/24 12:21:02 [INFO] rustwide::cmd: [stderr]   go: golang.org/x/crypto@v0.0.0-20200622213623-75b288015ac9: Get https://proxy.golang.org/golang.org/x/crypto/@v/v0.0.0-20200622213623-75b288015ac9.mod: dial tcp: lookup proxy.golang.org on 10.3.0.1:53: dial udp 10.3.0.1:53: connect: network is unreachable
2021/03/24 12:21:02 [INFO] rustwide::cmd: [stderr]   [38/272] Generating cipher_extra/chacha20_poly1305_x86_64.S
2021/03/24 12:21:02 [INFO] rustwide::cmd: [stderr]   ninja: build stopped: subcommand failed.

[jyn514]

You could vendor the sources, but we will not lift the network restriction for any crate.