move bindings generation to Rust build script
bit cleaner, esp. as less hardcoding of "debug" path instant updates all the way through to Haskell when we change Rust code (this wasn't actually working at all before even when we did manually run the script, because TH file-dependency tracking seemed to get confused with the way that the Bash code moved a file to the header path rather than editing it) should update to point to my comment on hs-bindgen actually, isn't there a race condition here? the header files are generated before the new Rust code is actually compiled, and Cabal could in theory end up still linking against the old output hardcoding "target" isn't great, though we do already do so in the Cabal file there seems to be no env var for it though docs suggest we're supposed to use OUT_DIR, but that has an unpredictable path... we could output the dir somewhere I suppose, and configure Cabal to use that, but that adds a fair bit of complexity look in to https://doc.rust-lang.org/cargo/reference/build-scripts.html#change-detection? bit blunt compared to e.g. Cabal Hooks, and anyway I think in the long run I'll be ditching `build.rs`, as discussed above
This commit is contained in:
George Thomas
parent
beb9e14542
commit
927bf229a4
@ -56,7 +56,6 @@
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llvmPackages.libclang
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llvmPackages.libclang
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llvmPackages.llvm
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llvmPackages.llvm
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rust-analyzer
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rust-analyzer
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rust-cbindgen
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];
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];
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};
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};
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});
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});
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@ -1,64 +1,5 @@
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#!/usr/bin/env bash
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#!/usr/bin/env bash
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set -euo pipefail
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set -euo pipefail
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# TODO this is a complete vibe-coded hack, but the header patching at least is crucial
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# Prepare Rust artifacts and C header for hs-bindgen.
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#
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# Pipeline:
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# 1. cargo build - build the Rust static library
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# 2. cbindgen - generate a C header from the Rust source
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# 3. awk - patch the header for hs-bindgen compatibility
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#
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# System include paths (needed by libclang on NixOS) are detected
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# automatically at TH compile time by GarnetRs.Raw — no env vars needed.
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#
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# Prerequisites: run inside the Nix dev shell (provides gcc, cbindgen).
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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RUST_DIR="$SCRIPT_DIR/rust"
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HEADER_NAME="garnet_rs.h"
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HEADER="$RUST_DIR/target/debug/$HEADER_NAME"
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# --- Step 1: Build Rust static library ---
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echo "=== Building Rust library ==="
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cargo build --manifest-path "$RUST_DIR/Cargo.toml"
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# --- Step 2: Generate C header with cbindgen ---
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echo "=== Running cbindgen ==="
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cbindgen \
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--lang c \
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--crate garnet-rs \
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--output "$HEADER" \
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--style tag \
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"$RUST_DIR"
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echo " Raw header written to $HEADER"
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# --- Step 3: Patch the header for hs-bindgen compatibility ---
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#
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# cbindgen emits: union { ... }; (anonymous)
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# hs-bindgen needs: union { ... } body; (named)
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# See: https://github.com/well-typed/hs-bindgen/issues/1649
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echo "=== Patching header ==="
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awk '
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# Name anonymous unions: }; at end of union block inside struct -> } body;
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/^ \};$/ && saw_union {
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print " } body;"
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saw_union = 0
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next
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}
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/^ union \{$/ {
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saw_union = 1
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}
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{ print }
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' "$HEADER" > "${HEADER}.tmp" && mv "${HEADER}.tmp" "$HEADER"
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echo " Patched header at $HEADER"
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echo "=== Done ==="
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echo "Run 'cabal run' to test."
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# place static lib in position for bundling with Cabal
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# place static lib in position for bundling with Cabal
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cp rust/target/debug/libgarnet_rs.a $(cabal list-bin . | sed -e 's=x/garnet/build/garnet/garnet=build=g')
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cp rust/target/debug/libgarnet_rs.a $(cabal list-bin . | sed -e 's=x/garnet/build/garnet/garnet=build=g')
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616
rust/Cargo.lock
generated
616
rust/Cargo.lock
generated
@ -2,6 +2,622 @@
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# It is not intended for manual editing.
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# It is not intended for manual editing.
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version = 4
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version = 4
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[[package]]
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name = "anstream"
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version = "0.6.21"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "43d5b281e737544384e969a5ccad3f1cdd24b48086a0fc1b2a5262a26b8f4f4a"
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dependencies = [
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"anstyle",
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"anstyle-parse",
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"anstyle-query",
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"anstyle-wincon",
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"colorchoice",
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"is_terminal_polyfill",
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"utf8parse",
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]
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[[package]]
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name = "anstyle"
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version = "1.0.13"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5192cca8006f1fd4f7237516f40fa183bb07f8fbdfedaa0036de5ea9b0b45e78"
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[[package]]
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name = "anstyle-parse"
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version = "0.2.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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|
checksum = "4e7644824f0aa2c7b9384579234ef10eb7efb6a0deb83f9630a49594dd9c15c2"
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dependencies = [
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"utf8parse",
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]
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[[package]]
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name = "anstyle-query"
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version = "1.1.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
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dependencies = [
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"windows-sys",
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]
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[[package]]
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name = "anstyle-wincon"
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version = "3.0.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
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|
dependencies = [
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"anstyle",
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"once_cell_polyfill",
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"windows-sys",
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]
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[[package]]
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name = "anyhow"
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version = "1.0.102"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
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[[package]]
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name = "bitflags"
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version = "2.11.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
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[[package]]
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name = "cbindgen"
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version = "0.29.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "befbfd072a8e81c02f8c507aefce431fe5e7d051f83d48a23ffc9b9fe5a11799"
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|
dependencies = [
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|
"clap",
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"heck",
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"indexmap",
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"log",
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"proc-macro2",
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"quote",
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"serde",
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"serde_json",
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"syn",
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"tempfile",
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"toml",
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]
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[[package]]
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name = "cfg-if"
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version = "1.0.4"
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|
source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
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||||||
|
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|
[[package]]
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||||||
|
name = "clap"
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||||||
|
version = "4.5.60"
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||||||
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source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "2797f34da339ce31042b27d23607e051786132987f595b02ba4f6a6dffb7030a"
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||||||
|
dependencies = [
|
||||||
|
"clap_builder",
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|
]
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||||||
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[[package]]
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||||||
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name = "clap_builder"
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|
version = "4.5.60"
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||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||||
|
checksum = "24a241312cea5059b13574bb9b3861cabf758b879c15190b37b6d6fd63ab6876"
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||||||
|
dependencies = [
|
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|
"anstream",
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||||||
|
"anstyle",
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||||||
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"clap_lex",
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||||||
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"strsim",
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]
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[[package]]
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name = "clap_lex"
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||||||
|
version = "1.0.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "3a822ea5bc7590f9d40f1ba12c0dc3c2760f3482c6984db1573ad11031420831"
|
||||||
|
|
||||||
|
[[package]]
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||||||
|
name = "colorchoice"
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||||||
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version = "1.0.4"
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||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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|
checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
|
||||||
|
|
||||||
|
[[package]]
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||||||
|
name = "equivalent"
|
||||||
|
version = "1.0.2"
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||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "errno"
|
||||||
|
version = "0.3.14"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
|
||||||
|
dependencies = [
|
||||||
|
"libc",
|
||||||
|
"windows-sys",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "fastrand"
|
||||||
|
version = "2.3.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "foldhash"
|
||||||
|
version = "0.1.5"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
|
||||||
|
|
||||||
[[package]]
|
[[package]]
|
||||||
name = "garnet-rs"
|
name = "garnet-rs"
|
||||||
version = "0.1.0"
|
version = "0.1.0"
|
||||||
|
dependencies = [
|
||||||
|
"cbindgen",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "getrandom"
|
||||||
|
version = "0.4.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "0de51e6874e94e7bf76d726fc5d13ba782deca734ff60d5bb2fb2607c7406555"
|
||||||
|
dependencies = [
|
||||||
|
"cfg-if",
|
||||||
|
"libc",
|
||||||
|
"r-efi",
|
||||||
|
"wasip2",
|
||||||
|
"wasip3",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "hashbrown"
|
||||||
|
version = "0.15.5"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
|
||||||
|
dependencies = [
|
||||||
|
"foldhash",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "hashbrown"
|
||||||
|
version = "0.16.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "heck"
|
||||||
|
version = "0.5.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "id-arena"
|
||||||
|
version = "2.3.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "indexmap"
|
||||||
|
version = "2.13.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
|
||||||
|
dependencies = [
|
||||||
|
"equivalent",
|
||||||
|
"hashbrown 0.16.1",
|
||||||
|
"serde",
|
||||||
|
"serde_core",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "is_terminal_polyfill"
|
||||||
|
version = "1.70.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "itoa"
|
||||||
|
version = "1.0.17"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "92ecc6618181def0457392ccd0ee51198e065e016d1d527a7ac1b6dc7c1f09d2"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "leb128fmt"
|
||||||
|
version = "0.1.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "libc"
|
||||||
|
version = "0.2.182"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "6800badb6cb2082ffd7b6a67e6125bb39f18782f793520caee8cb8846be06112"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "linux-raw-sys"
|
||||||
|
version = "0.12.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "log"
|
||||||
|
version = "0.4.29"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "memchr"
|
||||||
|
version = "2.8.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "once_cell"
|
||||||
|
version = "1.21.3"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
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||||||
|
"indexmap",
|
||||||
|
"log",
|
||||||
|
"semver",
|
||||||
|
"serde",
|
||||||
|
"serde_derive",
|
||||||
|
"serde_json",
|
||||||
|
"unicode-xid",
|
||||||
|
"wasmparser",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "zmij"
|
||||||
|
version = "1.0.21"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
|
||||||
|
|||||||
@ -6,3 +6,6 @@ edition = "2024"
|
|||||||
[lib]
|
[lib]
|
||||||
path = "lib.rs"
|
path = "lib.rs"
|
||||||
crate-type = ["staticlib"]
|
crate-type = ["staticlib"]
|
||||||
|
|
||||||
|
[build-dependencies]
|
||||||
|
cbindgen = "0.29"
|
||||||
|
|||||||
43
rust/build.rs
Normal file
43
rust/build.rs
Normal file
@ -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
|
||||||
|
// would otherwise just use `.write_to_file`
|
||||||
|
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();
|
||||||
|
}
|
||||||
Loading…
x
Reference in New Issue
Block a user