fix(osgen): treat ISM/KNN/LTR/ML/PPL/SM/UBI/WLM as acronyms

Go identifier convention requires acronyms to be all-uppercase (the
generator already does this for API, HTTP, JSON, URL, etc.). The
OpenSearch plugin-namespace acronyms were missing from the table, so the
generated surface emitted IsmPolicy, KnnStats, MlModel, SmPolicy, and
similar mis-cased identifiers.

Add the missing entries to the acronyms map so titleSegment expands them:

  ISM  Index State Management
  KNN  k-Nearest Neighbors
  LTR  Learning to Rank
  ML   Machine Learning
  PPL  Piped Processing Language
  SM   Snapshot Management
  UBI  User Behavior Insights
  WLM  Workload Management

Matching is whole-segment only (segments are split on '.' and '_' before
lookup), so words like "smile" are unaffected; a regression test pins
this. The rename takes effect on the next code generation, which rewrites
the affected *_gen.go identifiers (e.g. IsmPolicy -> ISMPolicy) in one
pass.

Closes opensearch-project#863

Signed-off-by: Sean Chittenden <sean.chittenden@crowdstrike.com>

Author: sean-

cmd/osgen/naming.go

@@ -89,16 +89,24 @@ var acronyms = map[string]string{
 	"https": "HTTPS",
 	"id":    "ID",
 	"ip":    "IP",
+	"ism":   "ISM", // Index State Management
 	"json":  "JSON",
-	"pit":   "PIT",
+	"knn":   "KNN", // k-Nearest Neighbors
+	"ltr":   "LTR", // Learning to Rank
+	"ml":    "ML",  // Machine Learning
+	"pit":   "PIT", // Point In Time
+	"ppl":   "PPL", // Piped Processing Language
+	"sm":    "SM",  // Snapshot Management
 	"sql":   "SQL",
 	"ssl":   "SSL",
 	"tcp":   "TCP",
 	"tls":   "TLS",
 	"ttl":   "TTL",
+	"ubi":   "UBI", // User Behavior Insights
 	"uri":   "URI",
 	"url":   "URL",
 	"uuid":  "UUID",
+	"wlm":   "WLM", // Workload Management
 	"xml":   "XML",
 }
 

cmd/osgen/naming_test.go

@@ -33,6 +33,15 @@ func TestTitleSegment(t *testing.T) {
 		{name: "ssl acronym", input: "ssl", want: "SSL"},
 		{name: "api acronym", input: "api", want: "API"},
 		{name: "json acronym", input: "json", want: "JSON"},
+		{name: "ism acronym", input: "ism", want: "ISM"},
+		{name: "knn acronym", input: "knn", want: "KNN"},
+		{name: "ltr acronym", input: "ltr", want: "LTR"},
+		{name: "ml acronym", input: "ml", want: "ML"},
+		{name: "ppl acronym", input: "ppl", want: "PPL"},
+		{name: "sm acronym", input: "sm", want: "SM"},
+		{name: "ubi acronym", input: "ubi", want: "UBI"},
+		{name: "wlm acronym", input: "wlm", want: "WLM"},
+		{name: "whole-segment only, not substring", input: "smile", want: "Smile"},
 		{name: "empty", input: "", want: ""},
 		{name: "mixed case id", input: "ID", want: "ID"},
 		{name: "mixed case uuid", input: "UUID", want: "UUID"},
@@ -276,6 +285,8 @@ func TestSchemaTypeName(t *testing.T) {
 		{name: "group._common cluster", schemaKey: "cluster._common___ComponentTemplate", want: "ClusterComponentTemplate"},
 		{name: "acronyms", schemaKey: "security._common___SSLInfo", want: "SecuritySSLInfo"},
 		{name: "sql plugin", schemaKey: "sql._common___SQLQuery", want: "SQLQuery"},
+		{name: "ism plugin acronym", schemaKey: "ism._common___Policy", want: "ISMPolicy"},
+		{name: "knn plugin acronym", schemaKey: "knn._common___Stats", want: "KNNStats"},
 		{name: "de-stutter empty result kept", schemaKey: "cluster.health___Health", want: "ClusterHealthHealth"},
 
 		// Idiomatic abbreviations: M-prefix initialisms, compound nouns,