internal/rosa: bind anitya functions

This is far more scalable than individual fields.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/package/perl.az

@@ -3,7 +3,7 @@ package perl {
 	website = "https://www.perl.org";
 	anitya = 13599;
 	// odd-even versioning
-	anityaFallback = true;
+	latest = anityaFallback;
 
 	version* = "5.42.2";
 	source = remoteTar {
@@ -86,7 +86,7 @@ package perl-SGMLS {
 	description = "class for postprocessing the output from the sgmls and nsgmls parsers";
 	website = "https://metacpan.org/release/RAAB/SGMLSpm-1.1";
 	anitya = 389576;
-	anityaLegacyCPAN = true;
+	latest = anityaLegacyCPAN;
 
 	version* = "1.1";
 	source = remoteCPAN {

internal/rosa/state.go

@@ -439,6 +439,21 @@ func (s *S) getFrame() azalea.Frame {
 			k("jobsFlagE"):  jobsFlagE,
 			k("jobsLE"):     jobsLE,
 			k("jobsLFlagE"): jobsLFlagE,
+
+			k("anityaFallback"): (*Versions).getStable,
+			k("anityaLegacyCPAN"): func(v *Versions) string {
+				for _, e := range v.Stable {
+					_, m, ok := strings.Cut(e, ".")
+					if !ok {
+						continue
+					}
+					if len(m) > 1 && m[0] == '0' {
+						continue
+					}
+					return e
+				}
+				return v.Latest
+			},
 		}
 		s.frame.Func = map[unique.Handle[azalea.Ident]]azalea.F{
 
@@ -795,15 +810,13 @@ func (ctx *evalContext) pf(
 		helper  Helper
 
 		inputs, runtimes azalea.Array
-
-		anityaFallback   bool
-		anityaLegacyCPAN bool
 	)
 	if err = args.Apply(map[unique.Handle[azalea.Ident]]any{
 		k("description"): &meta.Description,
 		k("website"):     &meta.Website,
 		k("version"):     &meta.Version,
 		k("anitya"):      &anitya,
+		k("latest"):      &meta.latest,
 
 		k("writable"):    &attr.Writable,
 		k("chmod"):       &attr.Chmod,
@@ -821,9 +834,6 @@ func (ctx *evalContext) pf(
 		k("exec"):     &helper,
 		k("inputs"):   &inputs,
 		k("runtime"):  &runtimes,
-
-		k("anityaFallback"):   &anityaFallback,
-		k("anityaLegacyCPAN"): &anityaLegacyCPAN,
 	}); err != nil {
 		return
 	}
@@ -835,24 +845,6 @@ func (ctx *evalContext) pf(
 	}
 
 	meta.ID = int(anitya)
-	if anityaFallback {
-		meta.latest = (*Versions).getStable
-	} else if anityaLegacyCPAN {
-		meta.latest = func(v *Versions) string {
-			for _, s := range v.Stable {
-				_, m, ok := strings.Cut(s, ".")
-				if !ok {
-					continue
-				}
-				if len(m) > 1 && m[0] == '0' {
-					continue
-				}
-				return s
-			}
-			return v.Latest
-		}
-	}
-
 	if output != nil {
 		v = cachedArtifact{&meta, output}
 		set = true