Merge branch 'master' into core-updates

1 files changed, 875 insertions, 15 deletions

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index db9665d1aa..6500adb215 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2019 Ivan Petkov <ivanppetkov@gmail.com>
+;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -22,27 +23,473 @@
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages))
 
-(define-public rust-unicode-xid
+;;;
+;;; Please: Try to add new module packages in alphabetic order.
+;;;
+
+(define-public rust-autocfg
   (package
-    (name "rust-unicode-xid")
-    (version "0.1.0")
+    (name "rust-autocfg")
+    (version "0.1.5")
     (source
       (origin
         (method url-fetch)
-        (uri (crate-uri "unicode-xid" version))
-        (file-name
-          (string-append name "-" version ".tar.gz"))
+        (uri (crate-uri "autocfg" version))
+        (file-name (string-append name "-" version ".tar.gz"))
         (sha256
-          (base32
-            "1z57lqh4s18rr4x0j4fw4fmp9hf9346h0kmdgqsqx0fhjr3k0wpw"))))
+         (base32
+          "0asl6fnc35yk5l2rxwhp25v128jgm45dp754h9z8x51b6n90w4r2"))))
     (build-system cargo-build-system)
-    (home-page
-      "https://github.com/unicode-rs/unicode-xid")
-    (synopsis "Determine Unicode XID related properties")
-    (description "Determine whether characters have the XID_Start
-or XID_Continue properties according to Unicode Standard Annex #31.")
-    ;; Dual licensed.
-    (license (list license:asl2.0 license:expat))))
+    (home-page "https://github.com/cuviper/autocfg")
+    (synopsis "Automatic cfg for Rust compiler features")
+    (description "Rust library for build scripts to automatically configure
+code based on compiler support.  Code snippets are dynamically tested to see
+if the @code{rustc} will accept them, rather than hard-coding specific version
+support.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-bencher
+  (package
+    (name "rust-bencher")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bencher" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1x8p2xblgqssay8cdykp5pkfc0np0jk5bs5cx4f5av097aav9zbx"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bluss/bencher/")
+    (synopsis "Port of the libtest benchmark runner to Rust stable")
+    (description "This package provides a port of the libtest (unstable Rust)
+benchmark runner to Rust stable releases.  Supports running benchmarks and
+filtering based on the name.  Benchmark execution works exactly the same way
+and no more (caveat: black_box is still missing!).")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-bitflags
+  (package
+    (name "rust-bitflags")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bitflags" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1zc1qb1hwsnl2d8rhzicsv9kqd5b2hwbrscrcfw5as4sfr35659x"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bitflags/bitflags")
+    (synopsis "Macro to generate structures which behave like bitflags")
+    (description "This package provides a macro to generate structures which
+behave like a set of bitflags.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-cfg-if
+  (package
+    (name "rust-cfg-if")
+    (version "0.1.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "cfg-if" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0csygklgz3ybpr0670rkip49zh76m43ar3k7xgypkzbzrwycx1ml"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/alexcrichton/cfg-if")
+    (synopsis "Define an item depending on parameters")
+    (description "This package provides a macro to ergonomically define an item
+depending on a large number of #[cfg] parameters.  Structured like an
+@code{if-else} chain, the first matching branch is the item that gets emitted.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-discard
+  (package
+    (name "rust-discard")
+    (version "1.0.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "discard" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1h67ni5bxvg95s91wgicily4ix7lcw7cq0a5gy9njrybaibhyb91"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/Pauan/rust-discard")
+    (synopsis "Allow for intentionally leaking memory")
+    (description "There are situations where you need to intentionally leak some
+memory but not other memory.  This package provides a discard trait which allows
+for intentionally leaking memory")
+    (license license:expat)))
+
+(define-public rust-doc-comment
+  (package
+    (name "rust-doc-comment")
+    (version "0.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "doc-comment" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "15rsqxgarfpb1yim9sbp9yfgj7p2dq6v51c6bq1a62paii9ylgcj"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/GuillaumeGomez/doc-comment")
+    (synopsis "Macro to generate doc comments")
+    (description "This package provides a way to generate doc comments
+from macros.")
+    (license license:expat)))
+
+(define-public rust-dtoa
+  (package
+    (name "rust-dtoa")
+    (version "0.4.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "dtoa" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0phbm7i0dpn44gzi07683zxaicjap5064w62pidci4fhhciv8mza"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dtolnay/dtoa")
+    (synopsis "Fast functions for printing floating-point primitives")
+    (description "This crate provides fast functions for printing
+floating-point primitives to an @code{io::Write}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-fallible-iterator
+  (package
+    (name "rust-fallible-iterator")
+    (version "0.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fallible-iterator" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1xq759lsr8gqss7hva42azn3whgrbrs2sd9xpn92c5ickxm1fhs4"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/sfackler/rust-fallible-iterator")
+    (synopsis "Fallible iterator traits")
+    (description "If the @code{std} or @code{alloc} features are enabled, this
+crate provides implementations for @code{Box}, @code{Vec}, @code{BTreeMap}, and
+@code{BTreeSet}.  If the @code{std} feature is enabled, this crate additionally
+provides implementations for @code{HashMap} and @code{HashSet}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-fnv
+  (package
+    (name "rust-fnv")
+    (version "1.0.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fnv" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1ww56bi1r5b8id3ns9j3qxbi7w5h005rzhiryy0zi9h97raqbb9g"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/servo/rust-fnv")
+    (synopsis "implementation of the Fowler-Noll-Vo hash function")
+    (description "The @code{fnv} hash function is a custom @code{Hasher}
+implementation that is more efficient for smaller hash keys.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-fs-extra
+  (package
+    (name "rust-fs-extra")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "fs_extra" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0x6675wdhsx277k1k1235jwcv38naf20d8kwrk948ds26hh4lajz"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/webdesus/fs_extra")
+    (synopsis "Extra filesystem methods")
+    (description "Expanding opportunities standard library @code{std::fs} and
+@code{std::io}.  Recursively copy folders with recept information about
+process and much more.")
+    (license license:expat)))
+
+(define-public rust-futures
+  (package
+    (name "rust-futures")
+    (version "0.1.28")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0saq8ffjw1pwf1pzhw3kq1z7dfq6wpd8x93dnni6vbkc799kkp25"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/rust-lang-nursery/futures-rs")
+    (synopsis "Implementation of zero-cost futures in Rust")
+    (description "An implementation of @code{futures} and @code{streams}
+featuring zero allocations, composability, and iterator-like interfaces.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-hex
+  (package
+    (name "rust-hex")
+    (version "0.3.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "hex" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0xsdcjiik5j750j67zk42qdnmm4ahirk3gmkmcqgq7qls2jjcl40"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/KokaKiwi/rust-hex")
+    (synopsis "Encode and decode data to/from hexadecimals")
+    (description "This crate allows for encoding and decoding data into/from
+hexadecimal representation.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-itoa
+  (package
+    (name "rust-itoa")
+    (version "0.4.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "itoa" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0zvg2d9qv3avhf3d8ggglh6fdyw8kkwqg3r4622ly5yhxnvnc4jh"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dtolnay/itoa")
+    (synopsis "Fast functions for printing integer primitives")
+    (description "This crate provides fast functions for printing integer
+primitives to an @code{io::Write}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-json
+  (package
+    (name "rust-json")
+    (version "0.11.14")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "json" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1hj8c6xj5c2aqqszi8naaflmcdbya1i9byyjrq4iybxjb4q91mq1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/maciejhirsz/json-rust")
+    (synopsis "JSON implementation in Rust")
+    (description "This crate provides a JSON implementation in Rust, reducing
+friction with idiomatic Rust structs to ease interopability.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-maplit
+  (package
+    (name "rust-maplit")
+    (version "1.0.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "maplit" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0hsczmvd6zkqgzqdjp5hfyg7f339n68w83n4pxvnsszrzssbdjq8"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bluss/maplit")
+    (synopsis "Collection of Map macros")
+    (description "This crate provides a collection of @code{literal} macros for
+@code{HashMap}, @code{HashSet}, @code{BTreeMap}, and @code{BTreeSet.}")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-matches
+  (package
+    (name "rust-matches")
+    (version "0.1.8")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "matches" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "020axl4q7rk9vz90phs7f8jas4imxal9y9kxl4z4v7a6719mrz3z"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/SimonSapin/rust-std-candidates")
+    (synopsis "Macro to evaluate whether an expression matches a pattern.")
+    (description "This package provides a macro to evaluate, as a boolean,
+whether an expression matches a pattern.")
+    (license license:expat)))
+
+(define-public rust-md5
+  (package
+    (name "rust-md5")
+    (version "0.6.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "md5" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "17b2xm4h4cvxsdjsf3kdrzqv2za60kak961xzi5kmw6g6djcssvy"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/stainless-steel/md5")
+    (synopsis "MD5 hash function in Rust")
+    (description "The package provides the MD5 hash function.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-peeking-take-while
+  (package
+    (name "rust-peeking-take-while")
+    (version "0.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "peeking_take_while" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "16bhqr6rdyrp12zv381cxaaqqd0pwysvm1q8h2ygihvypvfprc8r"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/fitzgen/peeking_take_while")
+    (synopsis "Provides the peeking_take_while iterator adaptor method")
+    (description
+      "Like @code{Iterator::take_while}, but calls the predicate on a peeked
+value.  This allows you to use @code{Iterator::by_ref} and
+@code{Iterator::take_while} together, and still get the first value for which
+the @code{take_while} predicate returned false after dropping the @code{by_ref}.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-percent-encoding
+  (package
+    (name "rust-percent-encoding")
+    (version "2.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "percent-encoding" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0m6rkp3iy11la04p6z3492rns6n693pvmx585dvfmzzlzak2hkxs"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/servo/rust-url/")
+    (synopsis "Percent encoding and decoding")
+    (description "This crate provides percent encoding and decoding.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pin-utils
+  (package
+    (name "rust-pin-utils")
+    (version "0.1.0-alpha.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pin-utils" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "11xmyx00n4m37d546by2rxb8ryxs12v55cc172i3yak1rqccd52q"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/rust-lang-nursery/pin-utils")
+    (synopsis "Utilities for pinning")
+    (description "This crate provides utilities for pinning values on the stack.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-plain
+  (package
+    (name "rust-plain")
+    (version "0.2.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "plain" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "19n1xbxb4wa7w891268bzf6cbwq4qvdb86bik1z129qb0xnnnndl"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/randomites/plain")
+    (synopsis "Rust library that allows reinterpreting data safely")
+    (description "This package provides a small Rust library that allows users
+ to reinterpret data of certain types safely.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-pocket-resources
+  (package
+    (name "rust-pocket-resources")
+    (version "0.3.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "pocket-resources" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1n2i5vmi8fdbw89wm5nz1ws1z9f1qax911p6ksg4scmdg23z6df1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/tomaka/pocket-resources")
+    (synopsis "Include resources in your applications")
+    (description "This crate allows you to include resources in your
+applications.")
+    (license license:expat)))
+
+(define-public rust-ppv-lite86
+  (package
+    (name "rust-ppv-lite86")
+    (version "0.2.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ppv-lite86" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "06snnv338w341nicfqba2jgln5dsla72ndkgrw7h1dfdb3vgkjz3"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/cryptocorrosion/cryptocorrosion")
+    (synopsis "Implementation of the crypto-simd API for x86")
+    (description "This crate provides an implementation of the crypto-simd API
+for x86.")
+    (license (list license:asl2.0
+                   license:expat))))
 
 (define-public rust-proc-macro2
   (package
@@ -69,6 +516,26 @@ in terms of the upstream unstable API.")
     ;; Dual licensed.
     (license (list license:asl2.0 license:expat))))
 
+(define-public rust-quick-error
+  (package
+    (name "rust-quick-error")
+    (version "1.2.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "quick-error" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1w6kgwwv7p7zr0yyg5rb315lkk24bimywklwx7fsvsbwi10bjx4j"))))
+    (build-system cargo-build-system)
+    (home-page "http://github.com/tailhook/quick-error")
+    (synopsis "Macro which makes error types pleasant to write")
+    (description "This crate provides a macro which makes error types pleasant
+to write.")
+    (license (list license:asl2.0
+                   license:expat))))
+
 (define-public rust-quote
   (package
     (name "rust-quote")
@@ -90,3 +557,396 @@ in terms of the upstream unstable API.")
     (description "Quasi-quoting macro quote!(...)")
     ;; Dual licensed.
     (license (list license:asl2.0 license:expat))))
+
+(define-public rust-rustc-std-workspace-core
+  (package
+    (name "rust-rustc-std-workspace-core")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "rustc-std-workspace-core" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1309xhwyai9xpz128xrfjqkmnkvgjwddznmj7brbd8i8f58zamhr"))))
+    (build-system cargo-build-system)
+    (home-page "https://crates.io/crates/rustc-std-workspace-core")
+    (synopsis "Explicitly empty crate for rust-lang/rust integration")
+    (description "This crate provides an explicitly empty crate for
+rust-lang/rust integration.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-scoped-tls
+  (package
+    (name "rust-scoped-tls")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "scoped-tls" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1hj8lifzvivdb1z02lfnzkshpvk85nkgzxsy2hc0zky9wf894spa"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/alexcrichton/scoped-tls")
+    (synopsis "Rust library providing the old standard library's scoped_thread_local")
+    (description "This crate provides a library implementation of the standard
+library's old @code{scoped_thread_local!} macro for providing scoped access to
+@dfn{thread local storage} (TLS) so any type can be stored into TLS.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-scopeguard
+  (package
+    (name "rust-scopeguard")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "scopeguard" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "03aay84r1f6w87ckbpj6cc4rnsxkxcfs13n5ynxjia0qkgjiabml"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/bluss/scopeguard")
+    (synopsis "Scope guard which will run a closure even out of scope")
+    (description "This package provides a RAII scope guard that will run a
+given closure when it goes out of scope, even if the code between panics
+(assuming unwinding panic).  Defines the macros @code{defer!},
+@code{defer_on_unwind!}, @code{defer_on_success!} as shorthands for guards
+with one of the implemented strategies.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-semver-parser
+  (package
+    (name "rust-semver-parser")
+    (version "0.9.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "semver-parser" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1ahqhvgpzhcsd28id7xnrjv4419i9yyalhm7d7zi430qx0hi2vml"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/steveklabnik/semver-parser")
+    (synopsis "Parsing of the semver spec")
+    (description "This package provides for parsing of the semver spec.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-shlex
+  (package
+    (name "rust-shlex")
+    (version "0.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "shlex" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1lmv6san7g8dv6jdfp14m7bdczq9ss7j7bgsfqyqjc3jnjfippvz"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/comex/rust-shlex")
+    (synopsis "Split a string into shell words, like Python's shlex")
+    (description "This crate provides a method to split a string into shell
+words, like Python's shlex.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-slab
+  (package
+    (name "rust-slab")
+    (version "0.4.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "slab" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1y59xsa27jk84sxzswjk60xcjf8b4fm5960jwpznrrcmasyva4f1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/carllerche/slab")
+    (synopsis "Pre-allocated storage for a uniform data type")
+    (description "This create provides a pre-allocated storage for a uniform
+data type.")
+    (license license:expat)))
+
+(define-public rust-spin
+  (package
+    (name "rust-spin")
+    (version "0.5.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "spin" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0m9clchsj0rf13bggsgvbv9haiy0f6rhvnvkpvkk8720a5pkydj4"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/mvdnes/spin-rs.git")
+    (synopsis "Synchronization primitives based on spinning")
+    (description "This crate provides synchronization primitives based on
+spinning.  They may contain data, are usable without @code{std},and static
+initializers are available.")
+    (license license:expat)))
+
+(define-public rust-stdweb-internal-runtime
+  (package
+    (name "rust-stdweb-internal-runtime")
+    (version "0.1.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "stdweb-internal-runtime" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1nhpyra7glbwcpakhpj5a3d7h7kx1ynif473nzshmk226m91f8ym"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/koute/stdweb")
+    (synopsis "Internal runtime for the @code{stdweb} crate")
+    (description "This crate provides internal runtime for the @code{stdweb}
+crate.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-strsim
+  (package
+    (name "rust-strsim")
+    (version "0.9.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "strsim" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1xphwhf86yxxmcpvm4mikj8ls41f6nf7gqyjm98b74mfk81h6b03"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dguo/strsim-rs")
+    (synopsis "Rust implementations of string similarity metrics")
+    (description "This crate includes implementations of string similarity
+metrics.  It includes Hamming, Levenshtein, OSA, Damerau-Levenshtein, Jaro,
+and Jaro-Winkler.")
+    (license license:expat)))
+
+(define-public rust-synstructure-test-traits
+  (package
+    (name "rust-synstructure-test-traits")
+    (version "0.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "synstructure_test_traits" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1b3fs2b9kc1gy9dilaxqjbdl4z0mlrbbxjzkprdx953rif1c3q66"))))
+    (build-system cargo-build-system)
+    (home-page "https://crates.io/crates/synstructure_test_traits")
+    (synopsis "Helper test traits for synstructure doctests")
+    (description
+     "This package provides helper test traits for synstructure doctests.")
+    (license license:expat)))
+
+(define-public rust-typenum
+  (package
+    (name "rust-typenum")
+    (version "1.10.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "typenum" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0sc1jirllfhdi52z1xv9yqzxzpk6v7vadd13n7wvs1wnjipn6bb1"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/paholg/typenum")
+    (synopsis "Rust library for type-level numbers evaluated at compile time")
+    (description "Typenum is a Rust library for type-level numbers evaluated at
+compile time.  It currently supports bits, unsigned integers, and signed
+integers.  It also provides a type-level array of type-level numbers, but its
+implementation is incomplete.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-ucd-util
+  (package
+    (name "rust-ucd-util")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "ucd-util" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0x088q5z0m09a2jqcfgsnq955y8syn1mgn35cl78qinkxm4kp6zs"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/BurntSushi/ucd-generate")
+    (synopsis "library for working with the Unicode character database")
+    (description "This package provides a small utility library for working
+with the Unicode character database.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-unicode-width
+  (package
+    (name "rust-unicode-width")
+    (version "0.1.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "unicode-width" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "09k5lipygardwy0660jhls08fsgknrazzivmn804gps53hiqc8w8"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/unicode-rs/unicode-width")
+    (synopsis "Determine displayed width according to Unicode rules")
+    (description "This crate allows you to determine displayed width of
+@code{char} and @code{str} types according to Unicode Standard Annex #11 rules.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-unicode-xid
+  (package
+    (name "rust-unicode-xid")
+    (version "0.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "unicode-xid" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1z57lqh4s18rr4x0j4fw4fmp9hf9346h0kmdgqsqx0fhjr3k0wpw"))))
+    (build-system cargo-build-system)
+    (home-page
+      "https://github.com/unicode-rs/unicode-xid")
+    (synopsis "Determine Unicode XID related properties")
+    (description "Determine whether characters have the XID_Start
+or XID_Continue properties according to Unicode Standard Annex #31.")
+    ;; Dual licensed.
+    (license (list license:asl2.0 license:expat))))
+
+(define-public rust-unindent
+  (package
+    (name "rust-unindent")
+    (version "0.1.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "unindent" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1x21ilf78aqcq9xzb9b7i628wm10rhk0jp0chlv06rkc690l8jw3"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/dtolnay/indoc")
+    (synopsis "Remove a column of leading whitespace from a string")
+    (description "This crate allows you to remove a column of leading
+whitespace from a string.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-wasm-bindgen-shared
+  (package
+    (name "rust-wasm-bindgen-shared")
+    (version "0.2.48")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "wasm-bindgen-shared" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "08rnfhjyk0f6liv8n4rdsvhx7r02glkhcbj2lp9lcbkbfpad9hnr"))))
+    (build-system cargo-build-system)
+    (home-page "https://rustwasm.github.io/wasm-bindgen/")
+    (synopsis "Shared support between wasm-bindgen and wasm-bindgen cli")
+    (description "This package provides shared support between
+@code{wasm-bindgen} and @code{wasm-bindgen} cli, an internal dependency.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-winapi
+  (package
+    (name "rust-winapi")
+    (version "0.3.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "winapi" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0w7pbhcl087lkggxdflfp2i92rq89ahsfdkjkv44fgmiy9m3h3pi"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-winapi-i686-pc-windows-gnu"
+         ,rust-winapi-i686-pc-windows-gnu)
+        ("rust-winapi-x86-64-pc-windows-gnu"
+         ,rust-winapi-x86-64-pc-windows-gnu))))
+    (home-page "https://github.com/retep998/winapi-rs")
+    (synopsis "Raw FFI bindings for all of Windows API.")
+    (description
+     "Raw FFI bindings for all of Windows API.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-winapi-i686-pc-windows-gnu
+  (package
+    (name "rust-winapi-i686-pc-windows-gnu")
+    (version "0.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "winapi-i686-pc-windows-gnu" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1dmpa6mvcvzz16zg6d5vrfy4bxgg541wxrcip7cnshi06v38ffxc"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/retep998/winapi-rs")
+    (synopsis "Import libraries for the i686-pc-windows-gnu target")
+    (description "This crate provides import libraries for the
+i686-pc-windows-gnu target.  Please don't use this crate directly, depend on
+@code{winapi} instead.")
+    (license (list license:asl2.0
+                   license:expat))))
+
+(define-public rust-winapi-x86-64-pc-windows-gnu
+  (package
+    (name "rust-winapi-x86-64-pc-windows-gnu")
+    (version "0.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "winapi-x86_64-pc-windows-gnu" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0gqq64czqb64kskjryj8isp62m2sgvx25yyj3kpc2myh85w24bki"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/retep998/winapi-rs")
+    (synopsis "Import libraries for the x86_64-pc-windows-gnu target")
+    (description "This package provides import libraries for the
+x86_64-pc-windows-gnu target.  Please don't use this crate directly, depend on
+@code{winapi} instead.")
+    (license (list license:asl2.0
+                   license:expat))))