snapshot of https://github.com/sqlc-dev/sqlc.git (main, 2026-09-16; blobs > 131072B omitted)

internal/migrations/migrations.go

@@ -0,0 +1,62 @@
+package migrations
+
+import (
+	"bufio"
+	"regexp"
+	"strings"
+)
+
+// psqlMetaCommand matches a psql meta-command (a line that begins with a
+// backslash followed by a command name). pg_dump emits these starting with
+// PostgreSQL 17.6 / 16.10 / 15.14 / 14.19 / 13.22 (e.g. `\restrict KEY` and
+// `\unrestrict KEY`), and sqlc's SQL parsers cannot handle them.
+var psqlMetaCommand = regexp.MustCompile(`^\\[A-Za-z!?;][^\n]*$`)
+
+// Remove all lines after a rollback comment.
+//
+// goose:       -- +goose Down
+// sql-migrate: -- +migrate Down
+// tern:        ---- create above / drop below ----
+// dbmate:      -- migrate:down
+func RemoveRollbackStatements(contents string) string {
+	s := bufio.NewScanner(strings.NewReader(contents))
+	var lines []string
+	for s.Scan() {
+		statement := strings.ToLower(s.Text())
+		if strings.HasPrefix(statement, "-- +goose down") {
+			break
+		}
+		if strings.HasPrefix(statement, "-- +migrate down") {
+			break
+		}
+		if strings.HasPrefix(statement, "---- create above / drop below ----") {
+			break
+		}
+		if strings.HasPrefix(statement, "-- migrate:down") {
+			break
+		}
+		lines = append(lines, s.Text())
+	}
+	return strings.Join(lines, "\n")
+}
+
+// RemovePsqlMetaCommands strips psql meta-command lines (e.g. `\restrict KEY`,
+// `\unrestrict KEY`, `\connect foo`) from SQL input. These are emitted by
+// pg_dump but are not valid SQL, so they must be removed before parsing.
+func RemovePsqlMetaCommands(contents string) string {
+	s := bufio.NewScanner(strings.NewReader(contents))
+	var lines []string
+	for s.Scan() {
+		line := s.Text()
+		if psqlMetaCommand.MatchString(line) {
+			continue
+		}
+		lines = append(lines, line)
+	}
+	return strings.Join(lines, "\n")
+}
+
+func IsDown(filename string) bool {
+	// Remove golang-migrate rollback files.
+	return strings.HasSuffix(filename, ".down.sql")
+}