log: bump logrotate dep, add zstd compressor

config.go

@@ -675,7 +675,8 @@ func loadConfig() (*config, []string, error) {
 
 	// Initialize log rotation.  After log rotation has been initialized, the
 	// logger variables may be used.
-	initLogRotator(filepath.Join(cfg.LogDir, defaultLogFilename))
+	logFile := filepath.Join(cfg.LogDir, defaultLogFilename)
+	initLogRotator(logFile, cfg.LogCompressor)
 
 	// Parse, validate, and set debug log level(s).
 	if err := parseAndSetDebugLevels(cfg.DebugLevel); err != nil {

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/decred/dcrd/lru v1.0.0
 	github.com/gorilla/websocket v1.5.0
 	github.com/jessevdk/go-flags v1.4.0
-	github.com/jrick/logrotate v1.0.0
+	github.com/jrick/logrotate v1.1.2
 	github.com/stretchr/testify v1.8.4
 	github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7
 	golang.org/x/crypto v0.22.0
@@ -25,6 +25,7 @@ require (
 	github.com/decred/dcrd/crypto/blake256 v1.0.0 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23 // indirect
+	github.com/klauspost/compress v1.15.15
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/stretchr/objx v0.5.0 // indirect
 	golang.org/x/net v0.24.0 // indirect

go.sum

@@ -59,10 +59,13 @@ github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpO
 github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jessevdk/go-flags v1.4.0 h1:4IU2WS7AumrZ/40jfhf4QVDMsQwqA7VEHozFRrGARJA=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
-github.com/jrick/logrotate v1.0.0 h1:lQ1bL/n9mBNeIXoTUoYRlK4dHuNJVofX9oWqBtPnSzI=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=
+github.com/jrick/logrotate v1.1.2 h1:6ePk462NCX7TfKtNp5JJ7MbA2YIslkpfgP03TlTYMN0=
+github.com/jrick/logrotate v1.1.2/go.mod h1:f9tdWggSVK3iqavGpyvegq5IhNois7KXmasU6/N96OQ=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23 h1:FOOIBWrEkLgmlgGfMuZT83xIwfPDxEI2OHu6xUmJMFE=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
+github.com/klauspost/compress v1.15.15 h1:EF27CXIuDsYJ6mmvtBRlEuB2UVOqHG1tAXgZ7yIO+lw=
+github.com/klauspost/compress v1.15.15/go.mod h1:ZcK2JAFqKOpnBlxcLsJzYfrS9X1akm9fHZNnD9+Vo/4=
 github.com/nxadm/tail v1.4.4 h1:DQuhQpB1tVlglWS2hLQ5OV6B5r8aGxSrPc5Qo6uTN78=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=

log.go

@@ -6,6 +6,7 @@
 package main
 
 import (
+	"compress/gzip"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -24,6 +25,7 @@ import (
 
 	"github.com/btcsuite/btclog"
 	"github.com/jrick/logrotate/rotator"
+	"github.com/klauspost/compress/zstd"
 )
 
 // logWriter implements an io.Writer that outputs to both standard output and
@@ -128,8 +130,8 @@ func supportedCompressor(compressor string) bool {
 
 // initLogRotator initializes the logging rotater to write logs to logFile and
 // create roll files in the same directory.  It must be called before the
-// package-global log rotater variables are used.
-func initLogRotator(logFile string) {
+// package-global log rotator variables are used.
+func initLogRotator(logFile, logCompressor string) {
 	logDir, _ := filepath.Split(logFile)
 	err := os.MkdirAll(logDir, 0700)
 	if err != nil {
@@ -149,6 +151,23 @@ func initLogRotator(logFile string) {
 		os.Exit(1)
 	}
 
+	var c rotator.Compressor
+	switch logCompressor {
+	case Gzip:
+		c = gzip.NewWriter(nil)
+
+	case Zstd:
+		c, err = zstd.NewWriter(nil)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to create zstd "+
+				"compressor: %v\n", err)
+			os.Exit(1)
+		}
+	}
+
+	// Apply the compressor and its file suffix to the log rotator.
+	r.SetCompressor(c, logCompressors[logCompressor])
+
 	logRotator = r
 }