chore: use go-log SlogHandler() for go-libp2p integration

update to go-log v2.8.3-0.20251105191458-101e2c1ac85a which provides
SlogHandler() function for explicit wiring.

simplify start.go by using logging.SlogHandler() directly instead of
slog.Default().Handler() with duck-typing verification. more explicit
and works even when GOLOG_CAPTURE_DEFAULT_SLOG=false.

Author: lidel

cmd/ipfs/kubo/start.go

@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log/slog"
 	"net"
 	"net/http"
 	"os"
@@ -57,20 +56,9 @@ func init() {
 	// This ensures go-libp2p logs integrate with go-log's formatting
 	// and dynamic level control (e.g., `ipfs log level libp2p-swarm debug`).
 	//
-	// go-log's init() installs its slog bridge via slog.SetDefault().
-	// We pass that handler to gologshim so go-libp2p loggers use it.
-	handler := slog.Default().Handler()
-
-	// Verify that slog.Default() is go-log's bridge via duck typing.
-	// This catches misconfigurations where go-log's init() didn't run.
-	type goLogBridge interface {
-		GoLogBridge()
-	}
-	if _, ok := handler.(goLogBridge); !ok {
-		panic("aborting startup: slog.Default() is not go-log's bridge, go-libp2p logs would be missing due to incorrect wiring")
-	}
-
-	gologshim.SetDefaultHandler(handler)
+	// Use SlogHandler() to get go-log's bridge directly.
+	// This works even when GOLOG_CAPTURE_DEFAULT_SLOG=false.
+	gologshim.SetDefaultHandler(logging.SlogHandler())
 }
 
 // declared as a var for testing purposes.

docs/examples/kubo-as-a-library/go.mod

@@ -93,7 +93,7 @@ require (
 	github.com/ipfs/go-ipld-format v0.6.3 // indirect
 	github.com/ipfs/go-ipld-git v0.1.1 // indirect
 	github.com/ipfs/go-ipld-legacy v0.2.2 // indirect
-	github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49 // indirect
+	github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a // indirect
 	github.com/ipfs/go-metrics-interface v0.3.0 // indirect
 	github.com/ipfs/go-peertaskqueue v0.8.2 // indirect
 	github.com/ipfs/go-test v0.2.3 // indirect

docs/examples/kubo-as-a-library/go.sum

@@ -349,8 +349,8 @@ github.com/ipfs/go-ipld-git v0.1.1/go.mod h1:+VyMqF5lMcJh4rwEppV0e6g4nCCHXThLYYD
 github.com/ipfs/go-ipld-legacy v0.2.2 h1:DThbqCPVLpWBcGtU23KDLiY2YRZZnTkXQyfz8aOfBkQ=
 github.com/ipfs/go-ipld-legacy v0.2.2/go.mod h1:hhkj+b3kG9b2BcUNw8IFYAsfeNo8E3U7eYlWeAOPyDU=
 github.com/ipfs/go-log v0.0.1/go.mod h1:kL1d2/hzSpI0thNYjiKfjanbVNU+IIGA/WnNESY9leM=
-github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49 h1:IeFkT7voVHOd7KsTTfXlIh4WIV9m7+UYLFuxLp6a5PM=
-github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49/go.mod h1:UhIYAwMV7Nb4ZmihUxfIRM2Istw/y9cAk3xaK+4Zs2c=
+github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a h1:ZtrWQty1MnTu5sJFWpX01KIAEgqmyVphKTmdIbuspm0=
+github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a/go.mod h1:UhIYAwMV7Nb4ZmihUxfIRM2Istw/y9cAk3xaK+4Zs2c=
 github.com/ipfs/go-metrics-interface v0.3.0 h1:YwG7/Cy4R94mYDUuwsBfeziJCVm9pBMJ6q/JR9V40TU=
 github.com/ipfs/go-metrics-interface v0.3.0/go.mod h1:OxxQjZDGocXVdyTPocns6cOLwHieqej/jos7H4POwoY=
 github.com/ipfs/go-peertaskqueue v0.8.2 h1:PaHFRaVFdxQk1Qo3OKiHPYjmmusQy7gKQUaL8JDszAU=

go.mod

@@ -39,7 +39,7 @@ require (
 	github.com/ipfs/go-ipld-format v0.6.3
 	github.com/ipfs/go-ipld-git v0.1.1
 	github.com/ipfs/go-ipld-legacy v0.2.2
-	github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49
+	github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a
 	github.com/ipfs/go-metrics-interface v0.3.0
 	github.com/ipfs/go-metrics-prometheus v0.1.0
 	github.com/ipfs/go-test v0.2.3

go.sum

@@ -416,8 +416,8 @@ github.com/ipfs/go-ipld-git v0.1.1/go.mod h1:+VyMqF5lMcJh4rwEppV0e6g4nCCHXThLYYD
 github.com/ipfs/go-ipld-legacy v0.2.2 h1:DThbqCPVLpWBcGtU23KDLiY2YRZZnTkXQyfz8aOfBkQ=
 github.com/ipfs/go-ipld-legacy v0.2.2/go.mod h1:hhkj+b3kG9b2BcUNw8IFYAsfeNo8E3U7eYlWeAOPyDU=
 github.com/ipfs/go-log v0.0.1/go.mod h1:kL1d2/hzSpI0thNYjiKfjanbVNU+IIGA/WnNESY9leM=
-github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49 h1:IeFkT7voVHOd7KsTTfXlIh4WIV9m7+UYLFuxLp6a5PM=
-github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49/go.mod h1:UhIYAwMV7Nb4ZmihUxfIRM2Istw/y9cAk3xaK+4Zs2c=
+github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a h1:ZtrWQty1MnTu5sJFWpX01KIAEgqmyVphKTmdIbuspm0=
+github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a/go.mod h1:UhIYAwMV7Nb4ZmihUxfIRM2Istw/y9cAk3xaK+4Zs2c=
 github.com/ipfs/go-metrics-interface v0.3.0 h1:YwG7/Cy4R94mYDUuwsBfeziJCVm9pBMJ6q/JR9V40TU=
 github.com/ipfs/go-metrics-interface v0.3.0/go.mod h1:OxxQjZDGocXVdyTPocns6cOLwHieqej/jos7H4POwoY=
 github.com/ipfs/go-metrics-prometheus v0.1.0 h1:bApWOHkrH3VTBHzTHrZSfq4n4weOZDzZFxUXv+HyKcA=

test/dependencies/go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/Kubuxu/gocovmerge v0.0.0-20161216165753-7ecaa51963cd
 	github.com/golangci/golangci-lint v1.64.8
 	github.com/ipfs/go-cidutil v0.1.0
-	github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49
+	github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a
 	github.com/ipfs/go-test v0.2.3
 	github.com/ipfs/hang-fds v0.1.0
 	github.com/ipfs/iptb v1.4.1

test/dependencies/go.sum

@@ -364,8 +364,8 @@ github.com/ipfs/go-ipld-format v0.6.3 h1:9/lurLDTotJpZSuL++gh3sTdmcFhVkCwsgx2+rA
 github.com/ipfs/go-ipld-format v0.6.3/go.mod h1:74ilVN12NXVMIV+SrBAyC05UJRk0jVvGqdmrcYZvCBk=
 github.com/ipfs/go-ipld-legacy v0.2.2 h1:DThbqCPVLpWBcGtU23KDLiY2YRZZnTkXQyfz8aOfBkQ=
 github.com/ipfs/go-ipld-legacy v0.2.2/go.mod h1:hhkj+b3kG9b2BcUNw8IFYAsfeNo8E3U7eYlWeAOPyDU=
-github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49 h1:IeFkT7voVHOd7KsTTfXlIh4WIV9m7+UYLFuxLp6a5PM=
-github.com/ipfs/go-log/v2 v2.8.3-0.20251104190326-eea1e4119c49/go.mod h1:UhIYAwMV7Nb4ZmihUxfIRM2Istw/y9cAk3xaK+4Zs2c=
+github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a h1:ZtrWQty1MnTu5sJFWpX01KIAEgqmyVphKTmdIbuspm0=
+github.com/ipfs/go-log/v2 v2.8.3-0.20251105191458-101e2c1ac85a/go.mod h1:UhIYAwMV7Nb4ZmihUxfIRM2Istw/y9cAk3xaK+4Zs2c=
 github.com/ipfs/go-metrics-interface v0.3.0 h1:YwG7/Cy4R94mYDUuwsBfeziJCVm9pBMJ6q/JR9V40TU=
 github.com/ipfs/go-metrics-interface v0.3.0/go.mod h1:OxxQjZDGocXVdyTPocns6cOLwHieqej/jos7H4POwoY=
 github.com/ipfs/go-peertaskqueue v0.8.2 h1:PaHFRaVFdxQk1Qo3OKiHPYjmmusQy7gKQUaL8JDszAU=