From 2d30b4dee596157d85ce9728921286a6242b5a29 Mon Sep 17 00:00:00 2001
From: Daniel J Walsh <dwalsh@redhat.com>
Date: Mon, 15 Aug 2022 07:18:34 -0400
Subject: Add compatibility support for --debug -D flag from docker

This is another fix for https://github.com/containers/podman/issues/14917

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
---
 cmd/podman/root.go         | 15 ++++++++++++++-
 test/system/001-basic.bats |  3 +++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/cmd/podman/root.go b/cmd/podman/root.go
index 3637b2674..f45dc94b2 100644
--- a/cmd/podman/root.go
+++ b/cmd/podman/root.go
@@ -71,7 +71,10 @@ var (
 		DisableFlagsInUseLine: true,
 	}
 
-	logLevel       = "warn"
+	defaultLogLevel = "warn"
+	logLevel        = defaultLogLevel
+	debug           bool
+
 	useSyslog      bool
 	requireCleanup = true
 )
@@ -310,6 +313,13 @@ func persistentPostRunE(cmd *cobra.Command, args []string) error {
 
 func loggingHook() {
 	var found bool
+	if debug {
+		if logLevel != defaultLogLevel {
+			fmt.Fprintf(os.Stderr, "Setting --log-level and --debug is not allowed\n")
+			os.Exit(1)
+		}
+		logLevel = "debug"
+	}
 	for _, l := range common.LogLevels {
 		if l == strings.ToLower(logLevel) {
 			found = true
@@ -465,6 +475,9 @@ func rootFlags(cmd *cobra.Command, opts *entities.PodmanConfig) {
 	pFlags.StringVar(&logLevel, logLevelFlagName, logLevel, fmt.Sprintf("Log messages above specified level (%s)", strings.Join(common.LogLevels, ", ")))
 	_ = rootCmd.RegisterFlagCompletionFunc(logLevelFlagName, common.AutocompleteLogLevel)
 
+	pFlags.BoolVar(&debug, "debug", false, "Docker compatibility, force setting of log-level")
+	_ = pFlags.MarkHidden("debug")
+
 	// Only create these flags for ABI connections
 	if !registry.IsRemote() {
 		runtimeflagFlagName := "runtime-flag"
diff --git a/test/system/001-basic.bats b/test/system/001-basic.bats
index cf37fc07c..584511388 100644
--- a/test/system/001-basic.bats
+++ b/test/system/001-basic.bats
@@ -190,6 +190,9 @@ See 'podman version --help'" "podman version --remote"
     run_podman --log-level=error   info
     run_podman --log-level=fatal   info
     run_podman --log-level=panic   info
+    run_podman --debug   info
+    run_podman 1 --debug --log-level=panic info
+    is "$output" "Setting --log-level and --debug is not allowed"
 }
 
 # vim: filetype=sh
-- 
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