feat(datagrip): migrate from LSP4IJ to native CLI integration

cmd/pgtidy/lint.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"os"
@@ -18,9 +19,10 @@ import (
 //	file:line:col: [RULEID] severity: message
 func cmdLint(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 	var (
-		only  []string // --only=ID,ID rule filter
-		fix   bool
-		files []string
+		only       []string // --only=ID,ID rule filter
+		fix        bool
+		jsonOutput bool
+		files      []string
 	)
 	for _, a := range args {
 		switch {
@@ -29,6 +31,8 @@ func cmdLint(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 			return 0
 		case a == "--fix":
 			fix = true
+		case a == "--json":
+			jsonOutput = true
 		case strings.HasPrefix(a, "--only="):
 			ids := strings.Split(strings.TrimPrefix(a, "--only="), ",")
 			for _, id := range ids {
@@ -66,7 +70,13 @@ func cmdLint(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 		return diags, nil
 	}
 
-	printDiags := func(diags []diagnostics.Diagnostic) {
+	var jsonDiags []diagnostics.Diagnostic
+
+	reportDiags := func(diags []diagnostics.Diagnostic) {
+		if jsonOutput {
+			jsonDiags = append(jsonDiags, diags...)
+			return
+		}
 		for _, d := range diags {
 			loc := d.File
 			if d.Line > 0 {
@@ -92,14 +102,14 @@ func cmdLint(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 			_, _ = fmt.Fprintf(stderr, "pgtidy: %v\n", err)
 			return 2
 		}
-		if fix {
+		if fix && !jsonOutput {
 			fixed := lint.ApplyFixes(string(src), diags)
 			if fixed != string(src) {
 				_, _ = io.WriteString(stdout, fixed)
 				return 0
 			}
 		}
-		printDiags(diags)
+		reportDiags(diags)
 		if len(diags) > 0 {
 			found = true
 		}
@@ -115,7 +125,7 @@ func cmdLint(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 				_, _ = fmt.Fprintf(stderr, "pgtidy: %v\n", err)
 				return 2
 			}
-			if fix {
+			if fix && !jsonOutput {
 				fixed := lint.ApplyFixes(string(src), diags)
 				if fixed != string(src) {
 					if err := os.WriteFile(path, []byte(fixed), 0o644); err != nil {
@@ -130,13 +140,24 @@ func cmdLint(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 					}
 				}
 			}
-			printDiags(diags)
+			reportDiags(diags)
 			if len(diags) > 0 {
 				found = true
 			}
 		}
 	}
 
+	if jsonOutput {
+		if jsonDiags == nil {
+			jsonDiags = []diagnostics.Diagnostic{}
+		}
+		enc := json.NewEncoder(stdout)
+		if err := enc.Encode(jsonDiags); err != nil {
+			_, _ = fmt.Fprintf(stderr, "pgtidy: encoding json: %v\n", err)
+			return 2
+		}
+	}
+
 	if found {
 		return 1
 	}
@@ -150,6 +171,7 @@ Read SQL from files (or stdin) and report lint findings.
 
 Flags:
   --fix           Apply autofixes for fixable rules (MIG001, MIG003) and rewrite files
+  --json          Emit findings as a JSON array instead of text (ignores --fix)
   --only=ID,...   comma-separated rule IDs to enable (default: all rules)
   -h, --help      show this help