remove sccache from CI (#1132)

CI jobs were running out of space and failing. Recent example:

https://github.com/NomicFoundation/slang/actions/runs/11488369511/job/32017344957

This is an intrim solution to disable `sccache`, which occupies a lot of
space.
Long term, we should look into splitting our testing into multiple jobs,
and only set up the required toolchains for each job as needed.

bin/hermit.hcl

@@ -7,8 +7,6 @@ env = {
   "RUST_BACKTRACE": "full",
   "RUST_STABLE_VERSION": "1.79.0", // __RUST_STABLE_VERSION_MARKER__ (keep in sync)
   "RUST_NIGHTLY_VERSION": "nightly-2024-06-17", // __RUST_NIGHTLY_VERSION_MARKER__ (keep in sync)
-  "RUSTC_WRAPPER": "${HERMIT_ENV}/bin/sccache",
-  "SCCACHE_DIR": "${HERMIT_ENV}/.hermit/sccache",
 
   // TypeScript:
   "TS_NODE_PROJECT": "${HERMIT_ENV}/tsconfig.json",

crates/infra/cli/src/commands/perf/benchmark/mod.rs

@@ -77,7 +77,7 @@ impl BenchmarkController {
             .property("--project", "slang")
             .property("--adapter", "rust_iai_callgrind")
             .property("--testbed", testbed)
-            .env("BENCHER_API_TOKEN", token);
+            .secret("BENCHER_API_TOKEN", token);
 
         if dry_run {
             command = command.flag("--dry-run");

crates/infra/utils/src/cargo/workspace.rs

@@ -145,5 +145,7 @@ impl CargoWorkspaceCommands for Command {
                 .unwrap(),
             ),
         )
+        // Print extra logs when build cache is invalidated:
+        .env("CARGO_LOG", "cargo::core::compiler::fingerprint=info")
     }
 }

crates/infra/utils/src/commands/mod.rs

@@ -17,7 +17,10 @@ use crate::paths::{PathExtensions, PrivatePathExtensions};
 pub struct Command {
     name: String,
     args: Vec<String>,
+
     environment: HashMap<String, String>,
+    secrets: HashMap<String, String>,
+
     current_dir: Option<PathBuf>,
 }
 
@@ -27,7 +30,10 @@ impl Command {
         Self {
             name: name.into(),
             args: vec![],
+
             environment: HashMap::new(),
+            secrets: HashMap::new(),
+
             current_dir: None,
         }
     }
@@ -70,6 +76,13 @@ impl Command {
         self
     }
 
+    #[must_use]
+    pub fn secret(mut self, key: impl Into<String>, value: impl Into<String>) -> Self {
+        self.secrets.insert(key.into(), value.into());
+
+        self
+    }
+
     #[must_use]
     pub fn current_dir(mut self, current_dir: impl Into<PathBuf>) -> Self {
         let current_dir = current_dir.into();
@@ -155,6 +168,7 @@ fn spawn_with_defaults(command: &Command, stdio: impl Fn() -> Stdio) -> Result<C
         .envs(vars())
         // Then apply any user provided overrides:
         .envs(&command.environment)
+        .envs(&command.secrets)
         // Set up stdio:
         .stdin(stdio())
         .stdout(stdio())
@@ -222,7 +236,11 @@ impl Display for Command {
             parts.push("&&".to_owned());
         }
 
-        for key in self.environment.keys() {
+        for (key, value) in &self.environment {
+            parts.push(format!("{key}='{value}'"));
+        }
+
+        for key in self.secrets.keys() {
             // Note: GitHub CI might not be able to obfuscate all secrets. Let's err on the side of caution:
             parts.push(format!("{key}='XXX'"));
         }