build-system/cargo: refactor phases to successfully build

* guix/build-system/cargo.scm (%cargo-build-system-modules):
Add (json parser).
(cargo-build):
[vendor-dir]: Define flag and pass it to builder code.
[cargo-test-flags]: Likewise.
[skip-build?]: Likewise.
* guix/build/cargo-build/system.scm (#:use-module): use (json parser).
(package-name->crate-name): Delete it.
(manifest-targets): Add it.
(has-executable-target?): Add it.
(configure): Add #:vendor-dir name and use it.
Don't touch Cargo.toml.
Don't symlink to duplicate inputs.
Remove useless registry line from cargo config.
Define RUSTFLAGS to lift lint restrictions.
(build): Add #:skip-build? flag and use it.
(check): Likewise.
Add #:cargo-test-flags and pass it to cargo.
(install): Factor source logic to install-source.
Define #:skip-build? flag and use it.
Only install if executable targets are present.
(install-source): Copy entire crate directory not just src.
[generate-checksums] pass dummy file for unused second argument.
(%standard-phases): Add install-source phase.

Signed-off-by: Chris Marusich <cmmarusich@gmail.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/guix/build-system/cargo.scm b/guix/build-system/cargo.scm
index 7ff4e90f71..dc137421e9 100644
--- a/guix/build-system/cargo.scm
+++ b/guix/build-system/cargo.scm
@@ -59,13 +59,17 @@ to NAME and VERSION."
 (define %cargo-build-system-modules
   ;; Build-side modules imported by default.
   `((guix build cargo-build-system)
+    (json parser)
     ,@%cargo-utils-modules))
 
 (define* (cargo-build store name inputs
                       #:key
                       (tests? #t)
                       (test-target #f)
+                      (vendor-dir "guix-vendor")
                       (cargo-build-flags ''("--release"))
+                      (cargo-test-flags ''("--release"))
+                      (skip-build? #f)
                       (phases '(@ (guix build cargo-build-system)
                                   %standard-phases))
                       (outputs '("out"))
@@ -90,8 +94,11 @@ to NAME and VERSION."
                                  source))
                     #:system ,system
                     #:test-target ,test-target
+                    #:vendor-dir ,vendor-dir
                     #:cargo-build-flags ,cargo-build-flags
-                    #:tests? ,tests?
+                    #:cargo-test-flags ,cargo-test-flags
+                    #:skip-build? ,skip-build?
+                    #:tests? ,(and tests? (not skip-build?))
                     #:phases ,phases
                     #:outputs %outputs
                     #:search-paths ',(map search-path-specification->sexp