[BUG] ANSI escape color formatting lost on multiple lines in logs #12789
Description
Description
When a service outputs text with ANSI escape codes for color formatting across multiple lines, docker compose logs only preserves the color for the first line.
Subsequent lines are displayed without the indended color.
| Expected | Actual |
|---|---|
 |
 |
Steps To Reproduce
Write the following code and execute docker compose up
# compose.yaml
services:
app:
image: bash
command: echo -e "\\e[31m This line is RED.\\n This line is also RED.\\n This span is ... \\e[34m BLUE."Compose Version
$ docker compose version
Docker Compose version v2.23.3
Docker Environment
$ docker info
Client: Docker Engine - Community
Version: 28.0.1
Context: default
Debug Mode: false
Plugins:
buildx: Docker Buildx (Docker Inc.)
Version: v0.21.1
Path: /usr/libexec/docker/cli-plugins/docker-buildx
compose: Docker Compose (Docker Inc.)
Version: v2.23.3
Path: /home/ras/.docker/cli-plugins/docker-compose
Server:
Containers: 101
Running: 0
Paused: 0
Stopped: 101
Images: 111
Server Version: 28.0.1
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: json-file
Cgroup Driver: systemd
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
Swarm: inactive
Runtimes: runc io.containerd.runc.v2
Default Runtime: runc
Init Binary: docker-init
containerd version: bcc810d6b9066471b0b6fa75f557a15a1cbf31bb
runc version: v1.2.4-0-g6c52b3f
init version: de40ad0
Security Options:
seccomp
Profile: builtin
cgroupns
Kernel Version: 5.15.133.1-microsoft-standard-WSL2
Operating System: Ubuntu 22.04.5 LTS
OSType: linux
Architecture: x86_64
CPUs: 8
Total Memory: 7.648GiB
Name: asymp
ID: 80909571-03a9-44bc-9158-3ca493dc5171
Docker Root Dir: /var/lib/docker
Debug Mode: false
Experimental: false
Insecure Registries:
::1/128
127.0.0.0/8
Live Restore Enabled: false
Anything else?
No response