core(fix append version)

Author: jr-k

internal/buildinfo/buildinfo.go

@@ -1,5 +1,10 @@
 package buildinfo
 
+import (
+  "runtime/debug"
+  "strings"
+)
+
 var (
   Version = "dev"
   Author  = "jr-k"
@@ -28,3 +33,38 @@ func Long() string {
   return "Version: " + Version + "\nCommit:  " + Commit + "\nBuilt:   " + Date
 }
 
+// init fills Version / Commit / Date from runtime/debug.ReadBuildInfo when the
+// ldflags injection (used by goreleaser) hasn't run. This is the case for
+// users installing via `go install github.com/jr-k/d4s@vX.Y.Z`, where Go
+// embeds the module version into the binary metadata.
+func init() {
+  info, ok := debug.ReadBuildInfo()
+  if !ok {
+    return
+  }
+
+  if Version == "dev" {
+    if v := info.Main.Version; v != "" && v != "(devel)" {
+      // goreleaser sets Version without the leading "v" (e.g. "0.49.99")
+      // and the UI prepends a "v" at display time. Keep the same shape
+      // here so we don't end up with "vv0.49.99". The "+dirty" suffix that
+      // Go >= 1.24 appends when building from a dirty VCS tree is kept on
+      // purpose so the displayed version reflects the real binary state.
+      Version = strings.TrimPrefix(v, "v")
+    }
+  }
+
+  for _, s := range info.Settings {
+    switch s.Key {
+    case "vcs.revision":
+      if Commit == "none" && s.Value != "" {
+        Commit = s.Value
+      }
+    case "vcs.time":
+      if Date == "unknown" && s.Value != "" {
+        Date = s.Value
+      }
+    }
+  }
+}
+