[bug#77093] [PATCH rust-team v3 14/17] build-system: cargo: Add ‘cargo-inputs’.

[Hilton Chain]

* gnu/packages/rust-crates.scm: New file.
* gnu/packages/rust-sources.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Regisiter them.
* guix/build-system/cargo.scm (crate-source,cargo-inputs): New procedures.
* guix/import/crate.scm: Hide ‘crate-source’ from (guix build-system cargo).
* etc/teams/rust/audit-rust-crates: New file.
* etc/teams/rust/cleanup-crates.sh: New file.
* etc/teams/rust/rust-crates.tmpl: New file.

Change-Id: I2f2d705a3e376ed3c646f31b824052a2278d4fb3
---
 etc/teams/rust/audit-rust-crates | 70 ++++++++++++++++++++++++++++++++
 etc/teams/rust/cleanup-crates.sh | 37 +++++++++++++++++
 etc/teams/rust/rust-crates.tmpl  | 42 +++++++++++++++++++
 gnu/local.mk                     |  2 +
 gnu/packages/rust-crates.scm     | 42 +++++++++++++++++++
 gnu/packages/rust-sources.scm    | 29 +++++++++++++
 guix/build-system/cargo.scm      | 47 ++++++++++++++++++++-
 guix/import/crate.scm            |  2 +-
 8 files changed, 269 insertions(+), 2 deletions(-)
 create mode 100755 etc/teams/rust/audit-rust-crates
 create mode 100755 etc/teams/rust/cleanup-crates.sh
 create mode 100644 etc/teams/rust/rust-crates.tmpl
 create mode 100644 gnu/packages/rust-crates.scm
 create mode 100644 gnu/packages/rust-sources.scm

diff --git a/etc/teams/rust/audit-rust-crates b/etc/teams/rust/audit-rust-crates
new file mode 100755
index 0000000000..d5546fd1e1
--- /dev/null
+++ b/etc/teams/rust/audit-rust-crates
@@ -0,0 +1,70 @@
+#!/usr/bin/env -S gawk -f
+# GNU Guix --- Functional package management for GNU
+# Copyright © 2025 Efraim Flashner <efraim@flashner.co.il>
+#
+# This file is part of GNU Guix.
+#
+# GNU Guix is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or (at
+# your option) any later version.
+#
+# GNU Guix is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+# To run:
+# ./etc/teams/rust/audit-rust-crates ./path/to/file.scm
+# Prints the output of cargo-audit to the shell.
+
+# Make sure we have cargo-audit in our PATH
+BEGIN {
+    if (system("which cargo-audit 1> /dev/null"))
+        exit 1;
+    # Parse a record at a time.
+    RS = "\n\n"
+    cargoAudit = "cargo-audit audit --file -"
+}
+
+# Check the crate-source origin-only inputs
+/crate-source/ {
+    for(i=3; i <= NF-2; i++) {
+        if($i == "(crate-source") {
+            cargoLock = cargoLock "[[package]]\nname = " $(i+1) "\nversion = " 
$(i+2) "\n"
+            next
+        }
+    }
+}
+
+# Check the crates packaged from crates.io tarballs
+/crate-uri/ {
+    for(i=3; i <= NF; i++) {
+        if($i == "(version")
+           crateVersion = $(i+1)
+        if($i == "(crate-uri")
+           crateName = $(i+1)
+    }
+    gsub(/)/, "", crateVersion)
+    cargoLock = cargoLock "[[package]]\nname = " crateName "\nversion = " 
crateVersion "\n"
+}
+
+# The xxxx-cargo-input variables have a set style
+# TODO: Replace the last dash between the name and the version with a space!
+# This doesn't take into account swapping between "-" and "_" so we skip it.
+#( $2 ~ /-cargo-inputs/ ) {
+#    sub(/-cargo-inputs/, "", $2)
+#    gsub(/)/, "", $0)
+#    gsub(/rust-/, "", $0)
+#    #gensub(/([[:alpha:]])-([[:digit:]]+)/, "\\1 \\2", "g", $i)
+#    print "[[package]]\nname = \"" $2 "\"\nversion = \"1.0.0\"\ndependencies 
= ["
+#    for (i = 4; i <= NF; i++) {
+#        print "\"" $i "\","
+#    }
+#    print "]"
+#}
+
+END { print cargoLock | cargoAudit }
diff --git a/etc/teams/rust/cleanup-crates.sh b/etc/teams/rust/cleanup-crates.sh
new file mode 100755
index 0000000000..eca37ca00c
--- /dev/null
+++ b/etc/teams/rust/cleanup-crates.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+# GNU Guix --- Functional package management for GNU
+# Copyright © 2025 Hilton Chain <hako@ultrarare.space>
+#
+# This file is part of GNU Guix.
+#
+# GNU Guix is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or (at
+# your option) any later version.
+#
+# GNU Guix is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+FILE=gnu/packages/rust-crates.scm
+PATTERN='^(define rust-'
+
+grep "$PATTERN" $FILE | cut -d' ' -f2 | while IFS= read -r crate
+do
+    if [ "$(grep -wc "$crate" $FILE)" -eq 1 ]; then
+        echo "\
+(begin
+  (use-modules (guix utils))
+  (let ((source-properties
+         (find-definition-location \"$FILE\" '$crate #:define-prefix 'define)))
+    (and=> source-properties delete-expression)))" |
+            guix repl -t machine
+    fi
+done
+
+# Delete extra newlines.
+sed --in-place ':a;N;$!ba;s/\n\n\+/\n\n/g' $FILE
diff --git a/etc/teams/rust/rust-crates.tmpl b/etc/teams/rust/rust-crates.tmpl
new file mode 100644
index 0000000000..98053b7151
--- /dev/null
+++ b/etc/teams/rust/rust-crates.tmpl
@@ -0,0 +1,42 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2025 Hilton Chain <hako@ultrarare.space>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages rust-crates)
+  #:use-module (guix gexp)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system cargo))
+
+;;;
+;;; This file is managed by ‘guix import’.  DO NOT add definitions manually.
+;;;
+
+;;;
+;;; Rust dependencies fetched from crates.io and non-workspace development
+;;; snapshots.
+;;;
+
+(define qqqq-separator 'begin-of-crates)
+
+(define ssss-separator 'end-of-crates)
+
+
+;;;
+;;; Cargo inputs.
+;;;
diff --git a/gnu/local.mk b/gnu/local.mk
index 02de02e65f..8d8bd6ebbe 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -616,6 +616,8 @@ GNU_SYSTEM_MODULES =                                \
   %D%/packages/rush.scm                                \
   %D%/packages/rust.scm                                \
   %D%/packages/rust-apps.scm                   \
+  %D%/packages/rust-crates.scm                 \
+  %D%/packages/rust-sources.scm                        \
   %D%/packages/samba.scm                       \
   %D%/packages/sagemath.scm                    \
   %D%/packages/sawfish.scm                     \
diff --git a/gnu/packages/rust-crates.scm b/gnu/packages/rust-crates.scm
new file mode 100644
index 0000000000..98053b7151
--- /dev/null
+++ b/gnu/packages/rust-crates.scm
@@ -0,0 +1,42 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2025 Hilton Chain <hako@ultrarare.space>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages rust-crates)
+  #:use-module (guix gexp)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system cargo))
+
+;;;
+;;; This file is managed by ‘guix import’.  DO NOT add definitions manually.
+;;;
+
+;;;
+;;; Rust dependencies fetched from crates.io and non-workspace development
+;;; snapshots.
+;;;
+
+(define qqqq-separator 'begin-of-crates)
+
+(define ssss-separator 'end-of-crates)
+
+
+;;;
+;;; Cargo inputs.
+;;;
diff --git a/gnu/packages/rust-sources.scm b/gnu/packages/rust-sources.scm
new file mode 100644
index 0000000000..bf9b91a671
--- /dev/null
+++ b/gnu/packages/rust-sources.scm
@@ -0,0 +1,29 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2025 Hilton Chain <hako@ultrarare.space>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages rust-sources)
+  #:use-module (guix gexp)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system cargo))
+
+;;;
+;;; Cargo workspaces and Rust dependencies requiring external inputs to
+;;; unbundle.
+;;;
diff --git a/guix/build-system/cargo.scm b/guix/build-system/cargo.scm
index 7a07003262..bbfa2f933b 100644
--- a/guix/build-system/cargo.scm
+++ b/guix/build-system/cargo.scm
@@ -31,6 +31,7 @@ (define-module (guix build-system cargo)
   #:use-module (guix gexp)
   #:use-module (guix monads)
   #:use-module (guix packages)
+  #:use-module (guix download)
   #:use-module (guix platform)
   #:use-module (guix build-system)
   #:use-module (guix build-system gnu)
@@ -45,7 +46,9 @@ (define-module (guix build-system cargo)
             crate-url
             crate-url?
             crate-uri
-            crate-name->package-name))
+            crate-name->package-name
+            crate-source
+            cargo-inputs))
 
 (define %crate-base-url
   (make-parameter "https://crates.io";))
@@ -62,6 +65,48 @@ (define (crate-uri name version)
 (define (crate-name->package-name name)
   (downstream-package-name "rust-" name))
 
+(define* (crate-source name version hash #:key (patches '()) (snippet #f))
+  (origin
+    (method url-fetch)
+    (uri (crate-uri name version))
+    (file-name
+     (string-append (crate-name->package-name name) "-" version ".tar.gz"))
+    (sha256 (base32 hash))
+    (modules '((guix build utils)))
+    (patches patches)
+    (snippet snippet)))
+
+(define* (cargo-inputs name #:key (crates-module '(gnu packages rust-crates))
+                       (sources-module '(gnu packages rust-sources)))
+
+  "Given symbol NAME, resolve variable 'NAME-cargo-inputs', an input list, in
+CRATES-MODULE, return its copy with #f removed and symbols resolved to
+variables defined in SOURCES-MODULE if the input list exists, otherwise return
+an empty list."
+  (let loop ((inputs
+              (catch #t
+                (lambda ()
+                  (module-ref (resolve-interface crates-module)
+                              (symbol-append name '-cargo-inputs)))
+                (const '())))
+             (result '()))
+    (if (null? inputs)
+        result
+        (match inputs
+          ((input . rest)
+           (loop rest
+                 (cond
+                  ;; #f, remove it.
+                  ((not input)
+                   result)
+                  ;; Symbol, resolve it in SOURCES-MODULE.
+                  ((symbol? input)
+                   (cons (module-ref (resolve-interface sources-module) input)
+                         result))
+                  ;; Else: keep it.
+                  (else
+                   (cons input result)))))))))
+
 (define (default-rust target)
   "Return the default Rust package."
   ;; Lazily resolve the binding to avoid a circular dependency.
diff --git a/guix/import/crate.scm b/guix/import/crate.scm
index 14e6e28c5b..a6f247bbae 100644
--- a/guix/import/crate.scm
+++ b/guix/import/crate.scm
@@ -27,7 +27,7 @@
 
 (define-module (guix import crate)
   #:use-module (guix base32)
-  #:use-module (guix build-system cargo)
+  #:use-module ((guix build-system cargo) #:hide (crate-source))
   #:use-module (guix diagnostics)
   #:use-module (gcrypt hash)
   #:use-module (guix http-client)
-- 
2.49.0