gnu: micro: Fix version flag variables and syntax highlighting.

* gnu/packages/text-editors.scm (micro)[arguments]: Fix import
and unpack path.  Add build flags to set version, hash and build
date variables through ldflags.  Add a go-generate phase before
the build phase to generate syntax files for highlighting.

Change-Id: Ifa56e8760a702f4954343ceaf6b77d97bc5c69fd

gnu/packages/text-editors.scm

@@ -162,6 +162,8 @@ extensions over the standard utility.")
     (license license:gpl3+)))
 
 (define-public micro
+  (let ((commit "04c577049ca898f097cd6a2dae69af0b4d4493e1")
+        (date "April 16, 2025"))
     (package
       (name "micro")
       (version "2.0.14")
@@ -178,12 +180,31 @@ extensions over the standard utility.")
       (arguments
        (list
         #:install-source? #f
-      #:import-path "github.com/zyedidia/micro/cmd/micro"
-      #:unpack-path "github.com/zyedidia/micro"
+        #:import-path "github.com/zyedidia/micro/v2/cmd/micro"
+        #:unpack-path "github.com/zyedidia/micro/v2"
+        #:build-flags
+        ;; Set value for variables in the `--version` flag
+        #~(list (format #f "-ldflags=~a ~a ~a"
+                        (string-append
+                         "-X github.com/zyedidia/micro/v2/internal/util.Version="
+                         #$version)
+                        (string-append
+                         "-X github.com/zyedidia/micro/v2/internal/util.CommitHash="
+                         (string-take #$commit 7))
+                        (format #f
+                         "-X 'github.com/zyedidia/micro/v2/internal/util.CompileDate=~a'"
+                         #$date)))
         ;; Step away from cmd/micro to test the whole project.
-      #:test-subdirs #~(list "../../...")))
-    (inputs
-     (list go-github-com-blang-semver
+        #:test-subdirs
+        #~(list "../../...")
+        #:phases
+        #~(modify-phases %standard-phases
+            ;; Generate syntax files.
+            (add-before 'build 'go-generate
+              (lambda _
+                (invoke "go" "generate" "-v" "-x"
+                        "github.com/zyedidia/micro/v2/runtime"))))))
+      (inputs (list go-github-com-blang-semver
                     go-github-com-dustin-go-humanize
                     go-github-com-go-errors-errors
                     go-github-com-layeh-gopher-luar
@@ -208,7 +229,7 @@ extensions over the standard utility.")
 intuitive, while also taking advantage of the capabilities of modern terminals.")
       ;; The project lists licenses of all used sources in LICENSE-THIRD-PARTY
       ;; file which are already included in Guix's package definition.
-    (license license:expat)))
+      (license license:expat))))
 
 (define-public lem
   (let ((commit "5fd512c8bab9de9a62709ac858fbb56337260cd5")