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Diffstat (limited to 'users/kranzes/wasm-hello-world/Cargo.nix')
| -rw-r--r-- | users/kranzes/wasm-hello-world/Cargo.nix | 1083 |
1 files changed, 1083 insertions, 0 deletions
diff --git a/users/kranzes/wasm-hello-world/Cargo.nix b/users/kranzes/wasm-hello-world/Cargo.nix new file mode 100644 index 000000000000..2f629a04d6e7 --- /dev/null +++ b/users/kranzes/wasm-hello-world/Cargo.nix @@ -0,0 +1,1083 @@ +# This file was @generated by crate2nix 0.14.1 with the command: +# "generate" "--all-features" +# See https://github.com/kolloch/crate2nix for more info. + +{ nixpkgs ? <nixpkgs> +, pkgs ? import nixpkgs { config = { }; } +, lib ? pkgs.lib +, stdenv ? pkgs.stdenv +, buildRustCrateForPkgs ? pkgs: pkgs.buildRustCrate + # This is used as the `crateOverrides` argument for `buildRustCrate`. +, defaultCrateOverrides ? pkgs.defaultCrateOverrides + # The features to enable for the root_crate or the workspace_members. +, rootFeatures ? [ "default" ] + # If true, throw errors instead of issueing deprecation warnings. +, strictDeprecation ? false + # Elements to add to the `-C target-feature=` argument passed to `rustc` + # (separated by `,`, prefixed with `+`). + # Used for conditional compilation based on CPU feature detection. +, targetFeatures ? [ ] + # Whether to perform release builds: longer compile times, faster binaries. +, release ? true + # Additional crate2nix configuration if it exists. +, crateConfig ? if builtins.pathExists ./crate-config.nix + then pkgs.callPackage ./crate-config.nix { } + else { } +}: + +rec { + # + # "public" attributes that we attempt to keep stable with new versions of crate2nix. + # + + rootCrate = rec { + packageId = "wasm_hello_world"; + + # Use this attribute to refer to the derivation building your root crate package. + # You can override the features with rootCrate.build.override { features = [ "default" "feature1" ... ]; }. + build = internal.buildRustCrateWithFeatures { + inherit packageId; + }; + + # Debug support which might change between releases. + # File a bug if you depend on any for non-debug work! + debug = internal.debugCrate { inherit packageId; }; + }; + # Refer your crate build derivation by name here. + # You can override the features with + # workspaceMembers."${crateName}".build.override { features = [ "default" "feature1" ... ]; }. + workspaceMembers = { + "wasm_hello_world" = rec { + packageId = "wasm_hello_world"; + build = internal.buildRustCrateWithFeatures { + packageId = "wasm_hello_world"; + }; + + # Debug support which might change between releases. + # File a bug if you depend on any for non-debug work! + debug = internal.debugCrate { inherit packageId; }; + }; + }; + + # A derivation that joins the outputs of all workspace members together. + allWorkspaceMembers = pkgs.symlinkJoin { + name = "all-workspace-members"; + paths = + let members = builtins.attrValues workspaceMembers; + in builtins.map (m: m.build) members; + }; + + # + # "internal" ("private") attributes that may change in every new version of crate2nix. + # + + internal = rec { + # Build and dependency information for crates. + # Many of the fields are passed one-to-one to buildRustCrate. + # + # Noteworthy: + # * `dependencies`/`buildDependencies`: similar to the corresponding fields for buildRustCrate. + # but with additional information which is used during dependency/feature resolution. + # * `resolvedDependencies`: the selected default features reported by cargo - only included for debugging. + # * `devDependencies` as of now not used by `buildRustCrate` but used to + # inject test dependencies into the build + + crates = { + "bumpalo" = rec { + crateName = "bumpalo"; + version = "3.16.0"; + edition = "2021"; + sha256 = "0b015qb4knwanbdlp1x48pkb4pm57b8gidbhhhxr900q2wb6fabr"; + authors = [ + "Nick Fitzgerald <fitzgen@gmail.com>" + ]; + features = { + "allocator-api2" = [ "dep:allocator-api2" ]; + "serde" = [ "dep:serde" ]; + }; + resolvedDefaultFeatures = [ "default" ]; + }; + "cfg-if" = rec { + crateName = "cfg-if"; + version = "1.0.0"; + edition = "2018"; + sha256 = "1za0vb97n4brpzpv8lsbnzmq5r8f2b0cpqqr0sy8h5bn751xxwds"; + authors = [ + "Alex Crichton <alex@alexcrichton.com>" + ]; + features = { + "compiler_builtins" = [ "dep:compiler_builtins" ]; + "core" = [ "dep:core" ]; + "rustc-dep-of-std" = [ "core" "compiler_builtins" ]; + }; + }; + "log" = rec { + crateName = "log"; + version = "0.4.21"; + edition = "2021"; + sha256 = "074hldq1q8rlzq2s2qa8f25hj4s3gpw71w64vdwzjd01a4g8rvch"; + authors = [ + "The Rust Project Developers" + ]; + features = { + "kv_serde" = [ "kv_std" "value-bag/serde" "serde" ]; + "kv_std" = [ "std" "kv" "value-bag/error" ]; + "kv_sval" = [ "kv" "value-bag/sval" "sval" "sval_ref" ]; + "kv_unstable" = [ "kv" "value-bag" ]; + "kv_unstable_serde" = [ "kv_serde" "kv_unstable_std" ]; + "kv_unstable_std" = [ "kv_std" "kv_unstable" ]; + "kv_unstable_sval" = [ "kv_sval" "kv_unstable" ]; + "serde" = [ "dep:serde" ]; + "sval" = [ "dep:sval" ]; + "sval_ref" = [ "dep:sval_ref" ]; + "value-bag" = [ "dep:value-bag" ]; + }; + }; + "once_cell" = rec { + crateName = "once_cell"; + version = "1.19.0"; + edition = "2021"; + sha256 = "14kvw7px5z96dk4dwdm1r9cqhhy2cyj1l5n5b29mynbb8yr15nrz"; + authors = [ + "Aleksey Kladov <aleksey.kladov@gmail.com>" + ]; + features = { + "alloc" = [ "race" ]; + "atomic-polyfill" = [ "critical-section" ]; + "critical-section" = [ "dep:critical-section" "portable-atomic" ]; + "default" = [ "std" ]; + "parking_lot" = [ "dep:parking_lot_core" ]; + "portable-atomic" = [ "dep:portable-atomic" ]; + "std" = [ "alloc" ]; + }; + resolvedDefaultFeatures = [ "alloc" "default" "race" "std" ]; + }; + "proc-macro2" = rec { + crateName = "proc-macro2"; + version = "1.0.85"; + edition = "2021"; + sha256 = "08zwg5l5f3czp62g4cvzgjwnk176lsrwq6kdi4x0arm9bbhlq912"; + libName = "proc_macro2"; + authors = [ + "David Tolnay <dtolnay@gmail.com>" + "Alex Crichton <alex@alexcrichton.com>" + ]; + dependencies = [ + { + name = "unicode-ident"; + packageId = "unicode-ident"; + } + ]; + features = { + "default" = [ "proc-macro" ]; + }; + resolvedDefaultFeatures = [ "default" "proc-macro" ]; + }; + "quote" = rec { + crateName = "quote"; + version = "1.0.36"; + edition = "2018"; + sha256 = "19xcmh445bg6simirnnd4fvkmp6v2qiwxh5f6rw4a70h76pnm9qg"; + authors = [ + "David Tolnay <dtolnay@gmail.com>" + ]; + dependencies = [ + { + name = "proc-macro2"; + packageId = "proc-macro2"; + usesDefaultFeatures = false; + } + ]; + features = { + "default" = [ "proc-macro" ]; + "proc-macro" = [ "proc-macro2/proc-macro" ]; + }; + resolvedDefaultFeatures = [ "default" "proc-macro" ]; + }; + "syn" = rec { + crateName = "syn"; + version = "2.0.66"; + edition = "2021"; + sha256 = "1xfgrprsbz8j31kabvfinb4fyhajlk2q7lxa18fb006yl90kyby4"; + authors = [ + "David Tolnay <dtolnay@gmail.com>" + ]; + dependencies = [ + { + name = "proc-macro2"; + packageId = "proc-macro2"; + usesDefaultFeatures = false; + } + { + name = "quote"; + packageId = "quote"; + optional = true; + usesDefaultFeatures = false; + } + { + name = "unicode-ident"; + packageId = "unicode-ident"; + } + ]; + features = { + "default" = [ "derive" "parsing" "printing" "clone-impls" "proc-macro" ]; + "printing" = [ "dep:quote" ]; + "proc-macro" = [ "proc-macro2/proc-macro" "quote?/proc-macro" ]; + "test" = [ "syn-test-suite/all-features" ]; + }; + resolvedDefaultFeatures = [ "clone-impls" "default" "derive" "full" "parsing" "printing" "proc-macro" "visit" ]; + }; + "unicode-ident" = rec { + crateName = "unicode-ident"; + version = "1.0.12"; + edition = "2018"; + sha256 = "0jzf1znfpb2gx8nr8mvmyqs1crnv79l57nxnbiszc7xf7ynbjm1k"; + authors = [ + "David Tolnay <dtolnay@gmail.com>" + ]; + + }; + "wasm-bindgen" = rec { + crateName = "wasm-bindgen"; + version = "0.2.92"; + edition = "2018"; + sha256 = "1a4mcw13nsk3fr8fxjzf9kk1wj88xkfsmnm0pjraw01ryqfm7qjb"; + authors = [ + "The wasm-bindgen Developers" + ]; + dependencies = [ + { + name = "cfg-if"; + packageId = "cfg-if"; + } + { + name = "wasm-bindgen-macro"; + packageId = "wasm-bindgen-macro"; + } + ]; + features = { + "default" = [ "spans" "std" ]; + "enable-interning" = [ "std" ]; + "gg-alloc" = [ "wasm-bindgen-test/gg-alloc" ]; + "serde" = [ "dep:serde" ]; + "serde-serialize" = [ "serde" "serde_json" "std" ]; + "serde_json" = [ "dep:serde_json" ]; + "spans" = [ "wasm-bindgen-macro/spans" ]; + "strict-macro" = [ "wasm-bindgen-macro/strict-macro" ]; + "xxx_debug_only_print_generated_code" = [ "wasm-bindgen-macro/xxx_debug_only_print_generated_code" ]; + }; + resolvedDefaultFeatures = [ "default" "spans" "std" ]; + }; + "wasm-bindgen-backend" = rec { + crateName = "wasm-bindgen-backend"; + version = "0.2.92"; + edition = "2018"; + sha256 = "1nj7wxbi49f0rw9d44rjzms26xlw6r76b2mrggx8jfbdjrxphkb1"; + authors = [ + "The wasm-bindgen Developers" + ]; + dependencies = [ + { + name = "bumpalo"; + packageId = "bumpalo"; + } + { + name = "log"; + packageId = "log"; + } + { + name = "once_cell"; + packageId = "once_cell"; + } + { + name = "proc-macro2"; + packageId = "proc-macro2"; + } + { + name = "quote"; + packageId = "quote"; + } + { + name = "syn"; + packageId = "syn"; + features = [ "full" ]; + } + { + name = "wasm-bindgen-shared"; + packageId = "wasm-bindgen-shared"; + } + ]; + features = { + "extra-traits" = [ "syn/extra-traits" ]; + }; + resolvedDefaultFeatures = [ "spans" ]; + }; + "wasm-bindgen-macro" = rec { + crateName = "wasm-bindgen-macro"; + version = "0.2.92"; + edition = "2018"; + sha256 = "09npa1srjjabd6nfph5yc03jb26sycjlxhy0c2a1pdrpx4yq5y51"; + procMacro = true; + authors = [ + "The wasm-bindgen Developers" + ]; + dependencies = [ + { + name = "quote"; + packageId = "quote"; + } + { + name = "wasm-bindgen-macro-support"; + packageId = "wasm-bindgen-macro-support"; + } + ]; + features = { + "spans" = [ "wasm-bindgen-macro-support/spans" ]; + "strict-macro" = [ "wasm-bindgen-macro-support/strict-macro" ]; + }; + resolvedDefaultFeatures = [ "spans" ]; + }; + "wasm-bindgen-macro-support" = rec { + crateName = "wasm-bindgen-macro-support"; + version = "0.2.92"; + edition = "2018"; + sha256 = "1dqv2xs8zcyw4kjgzj84bknp2h76phmsb3n7j6hn396h4ssifkz9"; + authors = [ + "The wasm-bindgen Developers" + ]; + dependencies = [ + { + name = "proc-macro2"; + packageId = "proc-macro2"; + } + { + name = "quote"; + packageId = "quote"; + } + { + name = "syn"; + packageId = "syn"; + features = [ "visit" "full" ]; + } + { + name = "wasm-bindgen-backend"; + packageId = "wasm-bindgen-backend"; + } + { + name = "wasm-bindgen-shared"; + packageId = "wasm-bindgen-shared"; + } + ]; + features = { + "extra-traits" = [ "syn/extra-traits" ]; + "spans" = [ "wasm-bindgen-backend/spans" ]; + }; + resolvedDefaultFeatures = [ "spans" ]; + }; + "wasm-bindgen-shared" = rec { + crateName = "wasm-bindgen-shared"; + version = "0.2.92"; + edition = "2018"; + links = "wasm_bindgen"; + sha256 = "15kyavsrna2cvy30kg03va257fraf9x00ny554vxngvpyaa0q6dg"; + authors = [ + "The wasm-bindgen Developers" + ]; + + }; + "wasm_hello_world" = rec { + crateName = "wasm_hello_world"; + version = "0.1.0"; + edition = "2021"; + src = lib.cleanSourceWith { filter = sourceFilter; src = ./.; }; + type = [ "cdylib" ]; + dependencies = [ + { + name = "wasm-bindgen"; + packageId = "wasm-bindgen"; + } + ]; + + }; + }; + + # + # crate2nix/default.nix (excerpt start) + # + + /* Target (platform) data for conditional dependencies. + This corresponds roughly to what buildRustCrate is setting. + */ + makeDefaultTarget = platform: { + unix = platform.isUnix; + windows = platform.isWindows; + fuchsia = true; + test = false; + + inherit (platform.rust.platform) + arch + os + vendor; + family = platform.rust.platform.target-family; + env = "gnu"; + endian = + if platform.parsed.cpu.significantByte.name == "littleEndian" + then "little" else "big"; + pointer_width = toString platform.parsed.cpu.bits; + debug_assertions = false; + }; + + /* Filters common temp files and build files. */ + # TODO(pkolloch): Substitute with gitignore filter + sourceFilter = name: type: + let + baseName = builtins.baseNameOf (builtins.toString name); + in + ! ( + # Filter out git + baseName == ".gitignore" + || (type == "directory" && baseName == ".git") + + # Filter out build results + || ( + type == "directory" && ( + baseName == "target" + || baseName == "_site" + || baseName == ".sass-cache" + || baseName == ".jekyll-metadata" + || baseName == "build-artifacts" + ) + ) + + # Filter out nix-build result symlinks + || ( + type == "symlink" && lib.hasPrefix "result" baseName + ) + + # Filter out IDE config + || ( + type == "directory" && ( + baseName == ".idea" || baseName == ".vscode" + ) + ) || lib.hasSuffix ".iml" baseName + + # Filter out nix build files + || baseName == "Cargo.nix" + + # Filter out editor backup / swap files. + || lib.hasSuffix "~" baseName + || builtins.match "^\\.sw[a-z]$$" baseName != null + || builtins.match "^\\..*\\.sw[a-z]$$" baseName != null + || lib.hasSuffix ".tmp" baseName + || lib.hasSuffix ".bak" baseName + || baseName == "tests.nix" + ); + + /* Returns a crate which depends on successful test execution + of crate given as the second argument. + + testCrateFlags: list of flags to pass to the test exectuable + testInputs: list of packages that should be available during test execution + */ + crateWithTest = { crate, testCrate, testCrateFlags, testInputs, testPreRun, testPostRun }: + assert builtins.typeOf testCrateFlags == "list"; + assert builtins.typeOf testInputs == "list"; + assert builtins.typeOf testPreRun == "string"; + assert builtins.typeOf testPostRun == "string"; + let + # override the `crate` so that it will build and execute tests instead of + # building the actual lib and bin targets We just have to pass `--test` + # to rustc and it will do the right thing. We execute the tests and copy + # their log and the test executables to $out for later inspection. + test = + let + drv = testCrate.override + ( + _: { + buildTests = true; + release = false; + } + ); + # If the user hasn't set any pre/post commands, we don't want to + # insert empty lines. This means that any existing users of crate2nix + # don't get a spurious rebuild unless they set these explicitly. + testCommand = pkgs.lib.concatStringsSep "\n" + (pkgs.lib.filter (s: s != "") [ + testPreRun + "$f $testCrateFlags 2>&1 | tee -a $out" + testPostRun + ]); + in + pkgs.runCommand "run-tests-${testCrate.name}" + { + inherit testCrateFlags; + buildInputs = testInputs; + } '' + set -e + + export RUST_BACKTRACE=1 + + # recreate a file hierarchy as when running tests with cargo + + # the source for test data + # It's necessary to locate the source in $NIX_BUILD_TOP/source/ + # instead of $NIX_BUILD_TOP/ + # because we compiled those test binaries in the former and not the latter. + # So all paths will expect source tree to be there and not in the build top directly. + # For example: $NIX_BUILD_TOP := /build in general, if you ask yourself. + # NOTE: There could be edge cases if `crate.sourceRoot` does exist but + # it's very hard to reason about them. + # Open a bug if you run into this! + mkdir -p source/ + cd source/ + + ${pkgs.buildPackages.xorg.lndir}/bin/lndir ${crate.src} + + # build outputs + testRoot=target/debug + mkdir -p $testRoot + + # executables of the crate + # we copy to prevent std::env::current_exe() to resolve to a store location + for i in ${crate}/bin/*; do + cp "$i" "$testRoot" + done + chmod +w -R . + + # test harness executables are suffixed with a hash, like cargo does + # this allows to prevent name collision with the main + # executables of the crate + hash=$(basename $out) + for file in ${drv}/tests/*; do + f=$testRoot/$(basename $file)-$hash + cp $file $f + ${testCommand} + done + ''; + in + pkgs.runCommand "${crate.name}-linked" + { + inherit (crate) outputs crateName; + passthru = (crate.passthru or { }) // { + inherit test; + }; + } + (lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) '' + echo tested by ${test} + '' + '' + ${lib.concatMapStringsSep "\n" (output: "ln -s ${crate.${output}} ${"$"}${output}") crate.outputs} + ''); + + /* A restricted overridable version of builtRustCratesWithFeatures. */ + buildRustCrateWithFeatures = + { packageId + , features ? rootFeatures + , crateOverrides ? defaultCrateOverrides + , buildRustCrateForPkgsFunc ? null + , runTests ? false + , testCrateFlags ? [ ] + , testInputs ? [ ] + # Any command to run immediatelly before a test is executed. + , testPreRun ? "" + # Any command run immediatelly after a test is executed. + , testPostRun ? "" + }: + lib.makeOverridable + ( + { features + , crateOverrides + , runTests + , testCrateFlags + , testInputs + , testPreRun + , testPostRun + }: + let + buildRustCrateForPkgsFuncOverriden = + if buildRustCrateForPkgsFunc != null + then buildRustCrateForPkgsFunc + else + ( + if crateOverrides == pkgs.defaultCrateOverrides + then buildRustCrateForPkgs + else + pkgs: (buildRustCrateForPkgs pkgs).override { + defaultCrateOverrides = crateOverrides; + } + ); + builtRustCrates = builtRustCratesWithFeatures { + inherit packageId features; + buildRustCrateForPkgsFunc = buildRustCrateForPkgsFuncOverriden; + runTests = false; + }; + builtTestRustCrates = builtRustCratesWithFeatures { + inherit packageId features; + buildRustCrateForPkgsFunc = buildRustCrateForPkgsFuncOverriden; + runTests = true; + }; + drv = builtRustCrates.crates.${packageId}; + testDrv = builtTestRustCrates.crates.${packageId}; + derivation = + if runTests then + crateWithTest + { + crate = drv; + testCrate = testDrv; + inherit testCrateFlags testInputs testPreRun testPostRun; + } + else drv; + in + derivation + ) + { inherit features crateOverrides runTests testCrateFlags testInputs testPreRun testPostRun; }; + + /* Returns an attr set with packageId mapped to the result of buildRustCrateForPkgsFunc + for the corresponding crate. + */ + builtRustCratesWithFeatures = + { packageId + , features + , crateConfigs ? crates + , buildRustCrateForPkgsFunc + , runTests + , makeTarget ? makeDefaultTarget + } @ args: + assert (builtins.isAttrs crateConfigs); + assert (builtins.isString packageId); + assert (builtins.isList features); + assert (builtins.isAttrs (makeTarget stdenv.hostPlatform)); + assert (builtins.isBool runTests); + let + rootPackageId = packageId; + mergedFeatures = mergePackageFeatures + ( + args // { + inherit rootPackageId; + target = makeTarget stdenv.hostPlatform // { test = runTests; }; + } + ); + # Memoize built packages so that reappearing packages are only built once. + builtByPackageIdByPkgs = mkBuiltByPackageIdByPkgs pkgs; + mkBuiltByPackageIdByPkgs = pkgs: + let + self = { + crates = lib.mapAttrs (packageId: value: buildByPackageIdForPkgsImpl self pkgs packageId) crateConfigs; + target = makeTarget stdenv.hostPlatform; + build = mkBuiltByPackageIdByPkgs pkgs.buildPackages; + }; + in + self; + buildByPackageIdForPkgsImpl = self: pkgs: packageId: + let + features = mergedFeatures."${packageId}" or [ ]; + crateConfig' = crateConfigs."${packageId}"; + crateConfig = + builtins.removeAttrs crateConfig' [ "resolvedDefaultFeatures" "devDependencies" ]; + devDependencies = + lib.optionals + (runTests && packageId == rootPackageId) + (crateConfig'.devDependencies or [ ]); + dependencies = + dependencyDerivations { + inherit features; + inherit (self) target; + buildByPackageId = depPackageId: + # proc_macro crates must be compiled for the build architecture + if crateConfigs.${depPackageId}.procMacro or false + then self.build.crates.${depPackageId} + else self.crates.${depPackageId}; + dependencies = + (crateConfig.dependencies or [ ]) + ++ devDependencies; + }; + buildDependencies = + dependencyDerivations { + inherit features; + inherit (self.build) target; + buildByPackageId = depPackageId: + self.build.crates.${depPackageId}; + dependencies = crateConfig.buildDependencies or [ ]; + }; + dependenciesWithRenames = + let + buildDeps = filterEnabledDependencies { + inherit features; + inherit (self) target; + dependencies = crateConfig.dependencies or [ ] ++ devDependencies; + }; + hostDeps = filterEnabledDependencies { + inherit features; + inherit (self.build) target; + dependencies = crateConfig.buildDependencies or [ ]; + }; + in + lib.filter (d: d ? "rename") (hostDeps ++ buildDeps); + # Crate renames have the form: + # + # { + # crate_name = [ + # { version = "1.2.3"; rename = "crate_name01"; } + # ]; + # # ... + # } + crateRenames = + let + grouped = + lib.groupBy + (dependency: dependency.name) + dependenciesWithRenames; + versionAndRename = dep: + let + package = crateConfigs."${dep.packageId}"; + in + { inherit (dep) rename; inherit (package) version; }; + in + lib.mapAttrs (name: builtins.map versionAndRename) grouped; + in + buildRustCrateForPkgsFunc pkgs + ( + crateConfig // { + src = crateConfig.src or ( + pkgs.fetchurl rec { + name = "${crateConfig.crateName}-${crateConfig.version}.tar.gz"; + # https://www.pietroalbini.org/blog/downloading-crates-io/ + # Not rate-limited, CDN URL. + url = "https://static.crates.io/crates/${crateConfig.crateName}/${crateConfig.crateName}-${crateConfig.version}.crate"; + sha256 = + assert (lib.assertMsg (crateConfig ? sha256) "Missing sha256 for ${name}"); + crateConfig.sha256; + } + ); + extraRustcOpts = lib.lists.optional (targetFeatures != [ ]) "-C target-feature=${lib.concatMapStringsSep "," (x: "+${x}") targetFeatures}"; + inherit features dependencies buildDependencies crateRenames release; + } + ); + in + builtByPackageIdByPkgs; + + /* Returns the actual derivations for the given dependencies. */ + dependencyDerivations = + { buildByPackageId + , features + , dependencies + , target + }: + assert (builtins.isList features); + assert (builtins.isList dependencies); + assert (builtins.isAttrs target); + let + enabledDependencies = filterEnabledDependencies { + inherit dependencies features target; + }; + depDerivation = dependency: buildByPackageId dependency.packageId; + in + map depDerivation enabledDependencies; + + /* Returns a sanitized version of val with all values substituted that cannot + be serialized as JSON. + */ + sanitizeForJson = val: + if builtins.isAttrs val + then lib.mapAttrs (n: sanitizeForJson) val + else if builtins.isList val + then builtins.map sanitizeForJson val + else if builtins.isFunction val + then "function" + else val; + + /* Returns various tools to debug a crate. */ + debugCrate = { packageId, target ? makeDefaultTarget stdenv.hostPlatform }: + assert (builtins.isString packageId); + let + debug = rec { + # The built tree as passed to buildRustCrate. + buildTree = buildRustCrateWithFeatures { + buildRustCrateForPkgsFunc = _: lib.id; + inherit packageId; + }; + sanitizedBuildTree = sanitizeForJson buildTree; + dependencyTree = sanitizeForJson + ( + buildRustCrateWithFeatures { + buildRustCrateForPkgsFunc = _: crate: { + "01_crateName" = crate.crateName or false; + "02_features" = crate.features or [ ]; + "03_dependencies" = crate.dependencies or [ ]; + }; + inherit packageId; + } + ); + mergedPackageFeatures = mergePackageFeatures { + features = rootFeatures; + inherit packageId target; + }; + diffedDefaultPackageFeatures = diffDefaultPackageFeatures { + inherit packageId target; + }; + }; + in + { internal = debug; }; + + /* Returns differences between cargo default features and crate2nix default + features. + + This is useful for verifying the feature resolution in crate2nix. + */ + diffDefaultPackageFeatures = + { crateConfigs ? crates + , packageId + , target + }: + assert (builtins.isAttrs crateConfigs); + let + prefixValues = prefix: lib.mapAttrs (n: v: { "${prefix}" = v; }); + mergedFeatures = + prefixValues + "crate2nix" + (mergePackageFeatures { inherit crateConfigs packageId target; features = [ "default" ]; }); + configs = prefixValues "cargo" crateConfigs; + combined = lib.foldAttrs (a: b: a // b) { } [ mergedFeatures configs ]; + onlyInCargo = + builtins.attrNames + (lib.filterAttrs (n: v: !(v ? "crate2nix") && (v ? "cargo")) combined); + onlyInCrate2Nix = + builtins.attrNames + (lib.filterAttrs (n: v: (v ? "crate2nix") && !(v ? "cargo")) combined); + differentFeatures = lib.filterAttrs + ( + n: v: + (v ? "crate2nix") + && (v ? "cargo") + && (v.crate2nix.features or [ ]) != (v."cargo".resolved_default_features or [ ]) + ) + combined; + in + builtins.toJSON { + inherit onlyInCargo onlyInCrate2Nix differentFeatures; + }; + + /* Returns an attrset mapping packageId to the list of enabled features. + + If multiple paths to a dependency enable different features, the + corresponding feature sets are merged. Features in rust are additive. + */ + mergePackageFeatures = + { crateConfigs ? crates + , packageId + , rootPackageId ? packageId + , features ? rootFeatures + , dependencyPath ? [ crates.${packageId}.crateName ] + , featuresByPackageId ? { } + , target + # Adds devDependencies to the crate with rootPackageId. + , runTests ? false + , ... + } @ args: + assert (builtins.isAttrs crateConfigs); + assert (builtins.isString packageId); + assert (builtins.isString rootPackageId); + assert (builtins.isList features); + assert (builtins.isList dependencyPath); + assert (builtins.isAttrs featuresByPackageId); + assert (builtins.isAttrs target); + assert (builtins.isBool runTests); + let + crateConfig = crateConfigs."${packageId}" or (builtins.throw "Package not found: ${packageId}"); + expandedFeatures = expandFeatures (crateConfig.features or { }) features; + enabledFeatures = enableFeatures (crateConfig.dependencies or [ ]) expandedFeatures; + depWithResolvedFeatures = dependency: + let + inherit (dependency) packageId; + features = dependencyFeatures enabledFeatures dependency; + in + { inherit packageId features; }; + resolveDependencies = cache: path: dependencies: + assert (builtins.isAttrs cache); + assert (builtins.isList dependencies); + let + enabledDependencies = filterEnabledDependencies { + inherit dependencies target; + features = enabledFeatures; + }; + directDependencies = map depWithResolvedFeatures enabledDependencies; + foldOverCache = op: lib.foldl op cache directDependencies; + in + foldOverCache + ( + cache: { packageId, features }: + let + cacheFeatures = cache.${packageId} or [ ]; + combinedFeatures = sortedUnique (cacheFeatures ++ features); + in + if cache ? ${packageId} && cache.${packageId} == combinedFeatures + then cache + else + mergePackageFeatures { + features = combinedFeatures; + featuresByPackageId = cache; + inherit crateConfigs packageId target runTests rootPackageId; + } + ); + cacheWithSelf = + let + cacheFeatures = featuresByPackageId.${packageId} or [ ]; + combinedFeatures = sortedUnique (cacheFeatures ++ enabledFeatures); + in + featuresByPackageId // { + "${packageId}" = combinedFeatures; + }; + cacheWithDependencies = + resolveDependencies cacheWithSelf "dep" + ( + crateConfig.dependencies or [ ] + ++ lib.optionals + (runTests && packageId == rootPackageId) + (crateConfig.devDependencies or [ ]) + ); + cacheWithAll = + resolveDependencies + cacheWithDependencies "build" + (crateConfig.buildDependencies or [ ]); + in + cacheWithAll; + + /* Returns the enabled dependencies given the enabled features. */ + filterEnabledDependencies = { dependencies, features, target }: + assert (builtins.isList dependencies); + assert (builtins.isList features); + assert (builtins.isAttrs target); + + lib.filter + ( + dep: + let + targetFunc = dep.target or (features: true); + in + targetFunc { inherit features target; } + && ( + !(dep.optional or false) + || builtins.any (doesFeatureEnableDependency dep) features + ) + ) + dependencies; + + /* Returns whether the given feature should enable the given dependency. */ + doesFeatureEnableDependency = dependency: feature: + let + name = dependency.rename or dependency.name; + prefix = "${name}/"; + len = builtins.stringLength prefix; + startsWithPrefix = builtins.substring 0 len feature == prefix; + in + feature == name || feature == "dep:" + name || startsWithPrefix; + + /* Returns the expanded features for the given inputFeatures by applying the + rules in featureMap. + + featureMap is an attribute set which maps feature names to lists of further + feature names to enable in case this feature is selected. + */ + expandFeatures = featureMap: inputFeatures: + assert (builtins.isAttrs featureMap); + assert (builtins.isList inputFeatures); + let + expandFeaturesNoCycle = oldSeen: inputFeatures: + if inputFeatures != [ ] + then + let + # The feature we're currently expanding. + feature = builtins.head inputFeatures; + # All the features we've seen/expanded so far, including the one + # we're currently processing. + seen = oldSeen // { ${feature} = 1; }; + # Expand the feature but be careful to not re-introduce a feature + # that we've already seen: this can easily cause a cycle, see issue + # #209. + enables = builtins.filter (f: !(seen ? "${f}")) (featureMap."${feature}" or [ ]); + in + [ feature ] ++ (expandFeaturesNoCycle seen (builtins.tail inputFeatures ++ enables)) + # No more features left, nothing to expand to. + else [ ]; + outFeatures = expandFeaturesNoCycle { } inputFeatures; + in + sortedUnique outFeatures; + + /* This function adds optional dependencies as features if they are enabled + indirectly by dependency features. This function mimics Cargo's behavior + described in a note at: + https://doc.rust-lang.org/nightly/cargo/reference/features.html#dependency-features + */ + enableFeatures = dependencies: features: + assert (builtins.isList features); + assert (builtins.isList dependencies); + let + additionalFeatures = lib.concatMap + ( + dependency: + assert (builtins.isAttrs dependency); + let + enabled = builtins.any (doesFeatureEnableDependency dependency) features; + in + if (dependency.optional or false) && enabled + then [ (dependency.rename or dependency.name) ] + else [ ] + ) + dependencies; + in + sortedUnique (features ++ additionalFeatures); + + /* + Returns the actual features for the given dependency. + + features: The features of the crate that refers this dependency. + */ + dependencyFeatures = features: dependency: + assert (builtins.isList features); + assert (builtins.isAttrs dependency); + let + defaultOrNil = + if dependency.usesDefaultFeatures or true + then [ "default" ] + else [ ]; + explicitFeatures = dependency.features or [ ]; + additionalDependencyFeatures = + let + name = dependency.rename or dependency.name; + stripPrefixMatch = prefix: s: + if lib.hasPrefix prefix s + then lib.removePrefix prefix s + else null; + extractFeature = feature: lib.findFirst + (f: f != null) + null + (map (prefix: stripPrefixMatch prefix feature) [ + (name + "/") + (name + "?/") + ]); + dependencyFeatures = lib.filter (f: f != null) (map extractFeature features); + in + dependencyFeatures; + in + defaultOrNil ++ explicitFeatures ++ additionalDependencyFeatures; + + /* Sorts and removes duplicates from a list of strings. */ + sortedUnique = features: + assert (builtins.isList features); + assert (builtins.all builtins.isString features); + let + outFeaturesSet = lib.foldl (set: feature: set // { "${feature}" = 1; }) { } features; + outFeaturesUnique = builtins.attrNames outFeaturesSet; + in + builtins.sort (a: b: a < b) outFeaturesUnique; + + deprecationWarning = message: value: + if strictDeprecation + then builtins.throw "strictDeprecation enabled, aborting: ${message}" + else builtins.trace message value; + + # + # crate2nix/default.nix (excerpt end) + # + }; +} + |