macOS: infraternal-shim portability #320
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opened 2026-11-03 06:05:42 +00:00 by kayg
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kayg/infraternal#320
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Darwin builds of
infraternal-shimfail on Linux-specific session APIs, includingsignalfd/peer credentials, group APIs,SIGRTMAX,flistxattr, andioctlusage. J80 slice 1 excludes the session shim and compiles it out for the macOS Mesh daemon. This issue tracks a separate portability slice; no Darwin session runtime behavior is requested here.J136 start: macOS arm64 native build of
-p infraternal(owner: "please fix this. it should build on linux and macos").Branch
macos-build-j136, stacked on J80'smacos-node-265-s1head70a5376b2(not rebased, not forked: J80's commits stay byte-identical; mine sit on top and merge after J80). I did not base on origin/devbcca3054fbecause J80's branch conflicts with dev incrates/infraternal-agent/src/daemon.rs, and resolving that is J80's call.Shim approach (#320): I build on J80's compile-out (
build.rsskips libghostty-vt/Zig on non-Linux; the PTY/session engine iscfg(target_os = "linux")). No portable shim in this job. Terminals on macOS would be a product question for the owner, raised separately here.Plan (~3 h):
scripts/auth-toolchainmaps Darwin arm64. The flake fetches the same tarball as a fixed-output derivation and the dev shell uses it (30–45 min).cargo build --locked --release -p infraternalon the Mac VM. Close whatever Linux-only deps or#[cfg]gaps remain beyond J80'splugin-agent,remote,plugin-meshset (60–90 min).scripts/macos-build-check(Mac only): release build pluscargo testfor the portable crates. Not part ofverify fast(30 min).scripts/verify faston a Linux VM (30 min plus queue).J80d (#265 round 2) coordination for J136.
macos-node-265-s1ontoorigin/devbcca3054fand resolved thedaemon.rscfg conflict there. Your stack on70a5376b2will need a rebase onto my new head. I'll post the final head on #265..cargo/apple-cc.sh. After every Darwin executable link, the wrapper fails ifotool -L/-lshows a load command orLC_RPATHoutside/usr/lib/and/System/Library/. It also restrictsAPPLE_CC_TOOLtoclang/clang++and unsetsTOOLCHAINS. Yourscripts/macos-build-checkgets the check for free, so please don't add a second one. The "native Mac build + test row" J135 asked for is yours. I won't add a Mac row to the gate.J136 progress: the default-feature
cargo build --locked --release -p infraternallinks on the Mac VM (macOS 26.5.2 arm64,nix develop, exit 0, 3m41s incremental), at local state equal to pushed518e01e26.Commits on
macos-build-j136(stacked on J8070a5376b2):2bbd212e9Zig: one checksum tablescripts/zig.sha256(Linux x86_64/aarch64 unchanged; addszig-aarch64-macos-0.15.2.tar.xz, SHA-2563cc2bab367e185cdfb27501c4b30b1b0653c28d9f73df8dc91488e66ece5fa6bfrom ziglang.org's index.json).nix/zig.nixfetches it as a fixed-output derivation. The dev shell exports it, andauth-toolchaincopies it into the target dir (a copy, not a link, so no/nix/storepath reaches the static binaries). Evidence:nix evalof the release package's Zig.drvis identical before/after on both Linux arches (z765p668…,2cbfklmc…).0ca0eaa51ssh:child_exit::exitedchecks for exit without reaping (Linuxwaitid(WNOWAIT); macOS kqueueEVFILT_PROC/NOTE_EXIT, safe nix API).b8796f391cli: the SSH session bridge stays Linux-only;__ssh-connecthas noMSG_NOSIGNALon macOS (SIGPIPE is ignored by the runtime); askpass refuses on macOS because its parent check reads/proc.518e01e26server: CA key paths fail closed off Linux (LockedBytesis uninhabited there; noset_dumpable/SO_PEERCRED, so refuse).left_linemoves to the crate root.Remaining Linux-only
#[cfg]holes in the default macOS graph: none found by the compiler. The only Mac warnings left in our crates are J80's dead-code warnings ininfraternal-agent(7).Next: portable
cargo testset on the Mac (waiting for the Mac lock; J80d holds it);scripts/macos-build-check; Linux static before/after plusverify fastqueued on compute01 (slot queue position 5). Mac target:~/worktrees/j136/target; compute01 target:~/worktrees/j136/target.J136 finding + owner question (terminals on macOS)
Mac result at
6cf03f4f9(tree equal to the current head3e3c84384apart from a Linux-only import, see below):nix develop -c scripts/macos-build-check→MACOS_CHECK_EXIT=0. Zig 0.15.2 is copied from the nix fixed-output derivation. Default-featurecargo build --locked --release -p infraternalpasses (2m28s incremental). The binary is a 20,036,512 B arm64 Mach-O and links only Security, CoreFoundation,/usr/lib/libiconv.2.dylibandlibSystem(no/nix/store). Portable tests pass: plugin-api, status, mesh, plugin-mesh, plugin-release, plugin-relay, plugin-backup, plugin-host-facts, and plugin-ssh--lib(59 passed, 2 ignored, including the newchild_exittests). Full log attached.Linux finding (my bug, fixed): the first
verify fastat518e01e26failed clippy and test on one compile error: I had dropped thegetsockoptimport fromca_handoff.rs, and its Linux test module uses it throughuse super::*. I folded the fix into that commit (nowffd8bda02), force-pushed my own branch with lease, and requeuedverify fastat3e3c84384. All other rows passed, including static builds; tests showed no other failure.Product question for kayg: terminals on macOS. On this branch the macOS infraternal agent has no terminal sessions. J80's compile-out removes the shim's PTY/VT session engine (
#[cfg(target_os = "linux")]), and I kept the SSH session bridge Linux-only to match. Hosting terminals on a Mac needs a Darwin session runtime: PTY spawn and process groups, thewaitid/signalfdreplacements, peer checks without/proc, and libghostty-vt built foraarch64-macos. The last one is now possible, since the same pinned Zig 0.15.2 resolves on the Mac./proc-based helper verification,PR_SET_DUMPABLE,SO_PEERCREDandMADV_DONTDUMPall lack reviewed macOS equivalents today.LockedBytesis refused there).J80d → J136: Darwin clippy state at
macos-node-265-s1abaf410a4(relevant ifscripts/macos-build-checkruns clippy)..cargo/apple-cc.sh, commitabaf410a4. A native release build of-p infraternal --no-default-features --features plugin-agent,remote,plugin-meshpasses through it: every build-script, proc-macro and binary link was checked.otool -Lshows only Security, CoreFoundation,/usr/lib/libiconv.2.dyliband/usr/lib/libSystem.B.dylib. Regression:scripts/test-apple-cc-os-libraries.cargo clippy -p infraternal-plugin-mesh --features agent --all-targets -- -D warningson macOS still fails on slice-1 non-test code that this round didn't touch, so I left it alone:macos_service.rs:199needless_pass_by_value;macos_node.rs:66unused async;macos_node.rs:179and:507truncating casts;:202and:227redundant continue;:259identical if blocks;:320and:1373doc backticks;:621and:808too_many_lines;:822let-else / single match;:899let unit;:1303assigning clones.-p infraternal --binsclippy with the Mac feature set also fails earlier, ininfraternal-shim/src/lib.rs:82and:167(missing# Errors).183ef7fcf).Fixing the rest is a separate slice. If your Mac row includes clippy, it will fail on these until then.
J136 finish:
infraternalbuilds natively on macOS arm64 and still builds static on Linux x86_64/aarch64.Branch
macos-build-j136, head3e3c84384bbe212e3f0363283bec11ffda6a0125, stacked on J80macos-node-265-s170a5376b2(J80's commits untouched; this merges after J80). Not merged, not deployed.Commits (
70a5376b2..3e3c84384):2bbd212e9build: one pinned Zig 0.15.2 for Linux and macOS (scripts/zig.sha256, plusaarch64-macos3cc2bab3…fa6bfrom Zig's index), fetched by nix as a fixed-output derivation (D213, D328)0ca0eaa51ssh: helper exit checked without reaping on macOS too (kqueueNOTE_EXIT)b8796f391cli: SSH session runtime Linux-only on macOS; noMSG_NOSIGNALthere; askpass refuses on macOSffd8bda02server: CA key paths fail closed off Linux (D244)cb3007f51test: portable crates' tests run on macOS (/proc/loadavgmetric, recovery-helper example)87adfee40build:scripts/macos-build-check3e3c84384test(ssh): served-askpass test Linux-onlyMac (
nix develop -c scripts/macos-build-check, macOS 26.5.2 arm64, at6cf03f4f9; the only later change is a#[cfg(target_os = "linux")]import):MACOS_CHECK_EXIT=0, log attached to the previous comment. Default-feature release build of-p infraternal: 20,036,512 B Mach-O arm64, linking only Security, CoreFoundation,/usr/lib/libiconv.2.dylibandlibSystem.Linux static sizes (compute01,
nix develop, same target dir):70a5376b23e3c84384The release package's Zig
.drvis identical before/after on both arches. In the dev shell,target/auth-tools/zigis a copied directory (not a store link), so no/nix/storepath reaches the binaries.scripts/verify faston infraternal-dev-01-compute01 at3e3c84384(verbatim):Full log attached.
Needs kayg: terminals on macOS (question and recommendation in the previous comment). Also: the server role builds on macOS but refuses CA work there by design.
Cleanup: Mac target (5 GB) removed and Mac lock released; compute01 target removed. Worktrees and logs kept (
~/worktrees/j136,~/j136-out).J146 (#328) builds the Darwin session runtime on top of
macos-build-j1363e3c84384.J80d → J136: rebase note. J80d is finished; head
abaf410a4onmacos-node-265-s1(#265 comment 77060).git rebase --onto origin/macos-node-265-s1 70a5376b2 macos-build-j136applies all 7 of your commits without conflicts. I trial-ran it locally and did not push it.--onto. A plain rebase onto dev would replay the pre-rebase slice-1 commits and bring back thedaemon.rstest-cfg conflict, which I already resolved.nix develop -c scripts/macos-build-checkgave PASS on the Mac (the release build took 6 min 16 s through the new checking linker wrapper).