internal/db: generate separate schema.md files for codeintel and frontend DBs

.prettierignore

@@ -5,6 +5,7 @@ client/browser/build
 **/package.json
 **/coverage
 internal/db/schema.md
+internal/db/schema.*.md
 cmd/xlang-python/python-langserver/
 package-lock.json
 package.json

internal/db/gen.go

@@ -1,4 +1,5 @@
 package db
 
 // $PGHOST, $PGUSER, $PGPORT etc. must be set to run this generate script.
-//go:generate env GO111MODULE=on go run schemadoc/main.go schema.md
+//go:generate env GO111MODULE=on go run schemadoc/main.go frontend schema.md
+//go:generate env GO111MODULE=on go run schemadoc/main.go codeintel schema.codeintel.md

internal/db/schema.codeintel.md

@@ -0,0 +1,71 @@
+# Table "public.codeintel_schema_migrations"
+```
+ Column  |  Type   | Modifiers 
+---------+---------+-----------
+ version | bigint  | not null
+ dirty   | boolean | not null
+Indexes:
+    "codeintel_schema_migrations_pkey" PRIMARY KEY, btree (version)
+
+```
+
+# Table "public.lsif_data_definitions"
+```
+   Column   |  Type   | Modifiers 
+------------+---------+-----------
+ dump_id    | integer | not null
+ scheme     | text    | not null
+ identifier | text    | not null
+ data       | bytea   | 
+Indexes:
+    "lsif_data_definitions_pkey" PRIMARY KEY, btree (dump_id, scheme, identifier)
+
+```
+
+# Table "public.lsif_data_documents"
+```
+ Column  |  Type   | Modifiers 
+---------+---------+-----------
+ dump_id | integer | not null
+ path    | text    | not null
+ data    | bytea   | 
+Indexes:
+    "lsif_data_documents_pkey" PRIMARY KEY, btree (dump_id, path)
+
+```
+
+# Table "public.lsif_data_metadata"
+```
+      Column       |  Type   | Modifiers 
+-------------------+---------+-----------
+ dump_id           | integer | not null
+ num_result_chunks | integer | 
+Indexes:
+    "lsif_data_metadata_pkey" PRIMARY KEY, btree (dump_id)
+
+```
+
+# Table "public.lsif_data_references"
+```
+   Column   |  Type   | Modifiers 
+------------+---------+-----------
+ dump_id    | integer | not null
+ scheme     | text    | not null
+ identifier | text    | not null
+ data       | bytea   | 
+Indexes:
+    "lsif_data_references_pkey" PRIMARY KEY, btree (dump_id, scheme, identifier)
+
+```
+
+# Table "public.lsif_data_result_chunks"
+```
+ Column  |  Type   | Modifiers 
+---------+---------+-----------
+ dump_id | integer | not null
+ idx     | integer | not null
+ data    | bytea   | 
+Indexes:
+    "lsif_data_result_chunks_pkey" PRIMARY KEY, btree (dump_id, idx)
+
+```

internal/db/schema.md

@@ -331,17 +331,6 @@ Referenced by:
 
 ```
 
-# Table "public.codeintel_schema_migrations"
-```
- Column  |  Type   | Modifiers 
----------+---------+-----------
- version | bigint  | not null
- dirty   | boolean | not null
-Indexes:
-    "codeintel_schema_migrations_pkey" PRIMARY KEY, btree (version)
-
-```
-
 # Table "public.critical_and_site_config"
 ```
    Column   |           Type           |                               Modifiers                               
@@ -574,67 +563,6 @@ Indexes:
 
 ```
 
-# Table "public.lsif_data_definitions"
-```
-   Column   |  Type   | Modifiers 
-------------+---------+-----------
- dump_id    | integer | not null
- scheme     | text    | not null
- identifier | text    | not null
- data       | bytea   | 
-Indexes:
-    "lsif_data_definitions_pkey" PRIMARY KEY, btree (dump_id, scheme, identifier)
-
-```
-
-# Table "public.lsif_data_documents"
-```
- Column  |  Type   | Modifiers 
----------+---------+-----------
- dump_id | integer | not null
- path    | text    | not null
- data    | bytea   | 
-Indexes:
-    "lsif_data_documents_pkey" PRIMARY KEY, btree (dump_id, path)
-
-```
-
-# Table "public.lsif_data_metadata"
-```
-      Column       |  Type   | Modifiers 
--------------------+---------+-----------
- dump_id           | integer | not null
- num_result_chunks | integer | 
-Indexes:
-    "lsif_data_metadata_pkey" PRIMARY KEY, btree (dump_id)
-
-```
-
-# Table "public.lsif_data_references"
-```
-   Column   |  Type   | Modifiers 
-------------+---------+-----------
- dump_id    | integer | not null
- scheme     | text    | not null
- identifier | text    | not null
- data       | bytea   | 
-Indexes:
-    "lsif_data_references_pkey" PRIMARY KEY, btree (dump_id, scheme, identifier)
-
-```
-
-# Table "public.lsif_data_result_chunks"
-```
- Column  |  Type   | Modifiers 
----------+---------+-----------
- dump_id | integer | not null
- idx     | integer | not null
- data    | bytea   | 
-Indexes:
-    "lsif_data_result_chunks_pkey" PRIMARY KEY, btree (dump_id, idx)
-
-```
-
 # Table "public.lsif_dirty_repositories"
 ```
     Column     |  Type   | Modifiers 

internal/db/schemadoc/main.go

@@ -12,7 +12,6 @@ import (
 	"time"
 
 	"github.com/sourcegraph/sourcegraph/internal/db/dbconn"
-	"github.com/sourcegraph/sourcegraph/internal/db/dbutil"
 	"github.com/sourcegraph/sourcegraph/internal/lazyregexp"
 
 	_ "github.com/lib/pq"
@@ -27,7 +26,7 @@ func runIgnoreError(cmd string, args ...string) {
 // PGPORT, PGUSER etc. env variables must be set to run this script.
 //
 // First CLI argument is an optional filename to write the output to.
-func generate(log *log.Logger) (string, error) {
+func generate(log *log.Logger, databaseName string) (string, error) {
 	const dbname = "schemadoc-gen-temp"
 
 	var (
@@ -99,12 +98,8 @@ func generate(log *log.Logger) (string, error) {
 		return "", fmt.Errorf("SetupGlobalConnection: %w", err)
 	}
 
-	// Migrate the codeintel db on top of the frontend one so we capture
-	// the schema of both databases.
-	for _, databaseName := range dbutil.DatabaseNames {
-		if err := dbconn.MigrateDB(dbconn.Global, databaseName); err != nil {
-			return "", fmt.Errorf("MigrateDB: %w", err)
-		}
+	if err := dbconn.MigrateDB(dbconn.Global, databaseName); err != nil {
+		return "", fmt.Errorf("MigrateDB: %w", err)
 	}
 
 	db, err := dbconn.Open(dataSource)
@@ -155,12 +150,12 @@ WHERE table_schema='public' AND table_type='BASE TABLE';
 }
 
 func main() {
-	out, err := generate(log.New(os.Stderr, "", log.LstdFlags))
+	out, err := generate(log.New(os.Stderr, "", log.LstdFlags), os.Args[1])
 	if err != nil {
 		log.Fatal(err)
 	}
 	if len(os.Args) > 1 {
-		if err := ioutil.WriteFile(os.Args[1], []byte(out), 0644); err != nil {
+		if err := ioutil.WriteFile(os.Args[2], []byte(out), 0644); err != nil {
 			log.Fatal(err)
 		}
 	} else {