1 files changed, 69 insertions, 0 deletions
diff --git a/modules/log/color_console_other.go b/modules/log/color_console_other.go
new file mode 100644
index 0000000..c08b38c
--- /dev/null
+++ b/modules/log/color_console_other.go
@@ -0,0 +1,69 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build !windows
+
+package log
+
+import (
+	"os"
+	"strconv"
+	"strings"
+	"syscall"
+
+	"github.com/mattn/go-isatty"
+)
+
+func journaldDevIno() (uint64, uint64, bool) {
+	journaldStream := os.Getenv("JOURNAL_STREAM")
+	if len(journaldStream) == 0 {
+		return 0, 0, false
+	}
+	deviceStr, inodeStr, ok := strings.Cut(journaldStream, ":")
+	device, err1 := strconv.ParseUint(deviceStr, 10, 64)
+	inode, err2 := strconv.ParseUint(inodeStr, 10, 64)
+	if !ok || err1 != nil || err2 != nil {
+		return 0, 0, false
+	}
+	return device, inode, true
+}
+
+func fileStatDevIno(file *os.File) (uint64, uint64, bool) {
+	info, err := file.Stat()
+	if err != nil {
+		return 0, 0, false
+	}
+
+	stat, ok := info.Sys().(*syscall.Stat_t)
+	if !ok {
+		return 0, 0, false
+	}
+
+	// Do a type conversion to uint64, because Dev isn't always uint64
+	// on every operating system + architecture combination.
+	return uint64(stat.Dev), stat.Ino, true //nolint:unconvert
+}
+
+func fileIsDevIno(file *os.File, dev, ino uint64) bool {
+	fileDev, fileIno, ok := fileStatDevIno(file)
+	return ok && dev == fileDev && ino == fileIno
+}
+
+func init() {
+	// When forgejo is running under service supervisor (e.g. systemd) with logging
+	// set to console, the output streams are typically captured into some logging
+	// system (e.g. journald or syslog) instead of going to the terminal. Disable
+	// usage of ANSI escape sequences if that's the case to avoid spamming
+	// the journal or syslog with garbled mess e.g. `#033[0m#033[32mcmd/web.go:102:#033[32m`.
+	CanColorStdout = isatty.IsTerminal(os.Stdout.Fd())
+	CanColorStderr = isatty.IsTerminal(os.Stderr.Fd())
+
+	// Furthermore, check if we are running under journald specifically so that
+	// further output adjustments can be applied. Specifically, this changes
+	// the console logger defaults to disable duplication of date/time info and
+	// enable emission of special control sequences understood by journald
+	// instead of ANSI colors.
+	journalDev, journalIno, ok := journaldDevIno()
+	JournaldOnStdout = ok && !CanColorStdout && fileIsDevIno(os.Stdout, journalDev, journalIno)
+	JournaldOnStderr = ok && !CanColorStderr && fileIsDevIno(os.Stderr, journalDev, journalIno)
+}