From 9121c71a6e4496069bbb2b6c5961609f29f209fa Mon Sep 17 00:00:00 2001
From: nesty92 <ernesto.alejandrosantana@gmail.com>
Date: Mon, 11 Nov 2024 09:32:03 +0000
Subject: [PATCH] log/slog: export Source method in Record for custom handler
 support

Currently, the `source` method in `slog.Record` is not accessible to
custom handlers, requiring developers to re-implement logic for
retrieving source location information. This commit exports the `source`
method as `Source`, enabling consistent access for custom logging
handlers and reducing code redundancy.

Fixes #70280

Change-Id: I3eb3bc60658abc5de95697a10bddd11ab54c6e13
GitHub-Last-Rev: 5c37e88ee57badccef0dfcac4337cf34848c7484
GitHub-Pull-Request: golang/go#70281
---
 src/log/slog/handler.go      | 2 +-
 src/log/slog/handler_test.go | 2 +-
 src/log/slog/logger_test.go  | 2 +-
 src/log/slog/record.go       | 4 ++--
 src/log/slog/record_test.go  | 2 +-
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/log/slog/handler.go b/src/log/slog/handler.go
index 2ff85b582ef..f9c9518f3f1 100644
--- a/src/log/slog/handler.go
+++ b/src/log/slog/handler.go
@@ -294,7 +294,7 @@ func (h *commonHandler) handle(r Record) error {
 	}
 	// source
 	if h.opts.AddSource {
-		state.appendAttr(Any(SourceKey, r.source()))
+		state.appendAttr(Any(SourceKey, r.Source()))
 	}
 	key = MessageKey
 	msg := r.Message
diff --git a/src/log/slog/handler_test.go b/src/log/slog/handler_test.go
index 8ce34526d0b..e2ab6820944 100644
--- a/src/log/slog/handler_test.go
+++ b/src/log/slog/handler_test.go
@@ -530,7 +530,7 @@ func TestJSONAndTextHandlers(t *testing.T) {
 		},
 	} {
 		r := NewRecord(testTime, LevelInfo, "message", callerPC(2))
-		line := strconv.Itoa(r.source().Line)
+		line := strconv.Itoa(r.Source().Line)
 		r.AddAttrs(test.attrs...)
 		var buf bytes.Buffer
 		opts := HandlerOptions{ReplaceAttr: test.replace, AddSource: test.addSource}
diff --git a/src/log/slog/logger_test.go b/src/log/slog/logger_test.go
index 9efd4ed0e91..dff2f71b07a 100644
--- a/src/log/slog/logger_test.go
+++ b/src/log/slog/logger_test.go
@@ -185,7 +185,7 @@ func TestCallDepth(t *testing.T) {
 		const wantFunc = "log/slog.TestCallDepth"
 		const wantFile = "logger_test.go"
 		wantLine := startLine + count*2
-		got := h.r.source()
+		got := h.r.Source()
 		gotFile := filepath.Base(got.File)
 		if got.Function != wantFunc || gotFile != wantFile || got.Line != wantLine {
 			t.Errorf("got (%s, %s, %d), want (%s, %s, %d)",
diff --git a/src/log/slog/record.go b/src/log/slog/record.go
index 97c87019a6a..5a06f4f8fd6 100644
--- a/src/log/slog/record.go
+++ b/src/log/slog/record.go
@@ -211,11 +211,11 @@ func (s *Source) group() Value {
 	return GroupValue(as...)
 }
 
-// source returns a Source for the log event.
+// Source returns a Source for the log event.
 // If the Record was created without the necessary information,
 // or if the location is unavailable, it returns a non-nil *Source
 // with zero fields.
-func (r Record) source() *Source {
+func (r Record) Source() *Source {
 	fs := runtime.CallersFrames([]uintptr{r.PC})
 	f, _ := fs.Next()
 	return &Source{
diff --git a/src/log/slog/record_test.go b/src/log/slog/record_test.go
index 931ab660418..575c7221f0b 100644
--- a/src/log/slog/record_test.go
+++ b/src/log/slog/record_test.go
@@ -56,7 +56,7 @@ func TestRecordSource(t *testing.T) {
 			pc = callerPC(test.depth + 1)
 		}
 		r := NewRecord(time.Time{}, 0, "", pc)
-		got := r.source()
+		got := r.Source()
 		if i := strings.LastIndexByte(got.File, '/'); i >= 0 {
 			got.File = got.File[i+1:]
 		}