Script the full build

Symlink static lib instead of copying
This means we need to run the script much less often.
2026-03-24 11:23:12 +00:00 · 2026-03-24 11:22:41 +00:00 · 2026-03-24 11:17:31 +00:00 · 2026-03-24 11:17:26 +00:00 · 2026-03-24 11:13:57 +00:00
6 changed files with 668 additions and 68 deletions
--- a/6
+++ b/6
@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cargo build --manifest-path ./rust/Cargo.toml
+ln -sf $(pwd)/rust/target/debug/libgarnet_rs.a $(cabal list-bin . | sed -e 's=x/garnet/build/garnet/garnet=build=g')
+cabal build
--- a/flake.nix
+++ b/flake.nix
@ -56,7 +56,6 @@
          llvmPackages.libclang
          llvmPackages.llvm
          rust-analyzer
-          rust-cbindgen
        ];
      };
    });
--- a/67
+++ b/67
@ -1,67 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-# TODO this is a complete vibe-coded hack, but the header patching at least is crucial
-
-# Prepare Rust artifacts and C header for hs-bindgen.
-#
-# Pipeline:
-#   1. cargo build       - build the Rust static library
-#   2. cbindgen           - generate a C header from the Rust source
-#   3. awk                - patch the header for hs-bindgen compatibility
-#   4. cp                 - copy static lib
-#
-# System include paths (needed by libclang on NixOS) are detected
-# automatically at TH compile time by GarnetRs.Raw — no env vars needed.
-#
-# Prerequisites: run inside the Nix dev shell (provides gcc, cbindgen).
-
-SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
-RUST_DIR="$SCRIPT_DIR/rust"
-HEADER_NAME="garnet_rs.h"
-HEADER="$RUST_DIR/target/debug/$HEADER_NAME"
-
-# --- Step 1: Build Rust static library ---
-echo "=== Building Rust library ==="
-cargo build --manifest-path "$RUST_DIR/Cargo.toml"
-
-# --- Step 2: Generate C header with cbindgen ---
-echo "=== Running cbindgen ==="
-cbindgen \
-  --lang c \
-  --crate garnet-rs \
-  --output "$HEADER" \
-  --style tag \
-  "$RUST_DIR"
-
-echo "  Raw header written to $HEADER"
-
-# --- Step 3: Patch the header for hs-bindgen compatibility ---
-#
-# cbindgen emits:    union { ... };       (anonymous)
-# hs-bindgen needs:  union { ... } body;  (named)
-# See: https://github.com/well-typed/hs-bindgen/issues/1649
-echo "=== Patching header ==="
-awk '
-# Name anonymous unions: }; at end of union block inside struct -> } body;
-/^  \};$/ && saw_union {
-    print "  } body;"
-    saw_union = 0
-    next
-}
-/^  union \{$/ {
-    saw_union = 1
-}
-
-{ print }
-' "$HEADER" > "${HEADER}.tmp" && mv "${HEADER}.tmp" "$HEADER"
-
-echo "  Patched header at $HEADER"
-
-# --- Step 4: Copy static lib for Cabal ---
-#
-# Place library in the location from which Cabal can bundle it.
-cp rust/target/debug/libgarnet_rs.a $(cabal list-bin . | sed -e 's=x/garnet/build/garnet/garnet=build=g')
-
-echo "=== Done ==="
-echo "Run 'cabal run' to test."
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@ -2,6 +2,622 @@
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+ "serde_json",
+ "wasm-encoder",
+ "wasm-metadata",
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+ "anyhow",
+ "id-arena",
+ "indexmap",
+ "log",
+ "semver",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "unicode-xid",
+ "wasmparser",
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--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@ -6,3 +6,6 @@ edition = "2024"
 [lib]
 path = "lib.rs"
 crate-type = ["staticlib"]
+
+[build-dependencies]
+cbindgen = "0.29"
--- a/rust/build.rs
+++ b/rust/build.rs
@ -0,0 +1,43 @@
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    let profile = env::var("PROFILE").unwrap();
+
+    let bindings = cbindgen::Builder::new()
+        .with_crate(&crate_dir)
+        .with_language(cbindgen::Language::C)
+        .with_style(cbindgen::Style::Tag)
+        .generate()
+        .expect("Unable to generate bindings");
+
+    // TODO vibe-coded workaround for hs-bindgen issue:
+    // https://github.com/well-typed/hs-bindgen/issues/1649#issuecomment-3994425922
+    let mut buf = Vec::new();
+    bindings.write(&mut buf);
+    let header = String::from_utf8(buf).unwrap();
+    let mut patched = String::new();
+    let mut saw_union = false;
+    for line in header.lines() {
+        if line == "  };" && saw_union {
+            patched.push_str("  } body;\n");
+            saw_union = false;
+            continue;
+        }
+        if line == "  union {" {
+            saw_union = true;
+        }
+        patched.push_str(line);
+        patched.push('\n');
+    }
+    fs::write(
+        PathBuf::from(&crate_dir)
+            .join("target")
+            .join(&profile)
+            .join("garnet_rs.h"),
+        patched,
+    )
+    .unwrap();
+}
Author	SHA1	Message	Date
George Thomas	2ed609fadb	Script the full build	2026-03-24 11:23:12 +00:00
George Thomas	ef625c307d	Symlink static lib instead of copying This means we need to run the script much less often.	2026-03-24 11:22:41 +00:00
George Thomas	f10c7a29a7	Revert "Ditch Bash script for custom setup" This reverts commit 1f1c0d959da699ce04f7951ecbcdb7976c8c0750. This doesn't work well with multi-component builds. For example, it requires `"haskell.sessionLoading": "singleComponent"` in VSCode, which makes HLS work less reliably.	2026-03-24 11:17:31 +00:00
George Thomas	1f1c0d959d	Ditch Bash script for custom setup	2026-03-24 11:17:26 +00:00
George Thomas	6d6bb4ba58	Move bindings generation to Rust build script	2026-03-24 11:13:57 +00:00