Remove support for CentOS

See:
- https://blog.centos.org/2020/12/future-is-centos-stream/
- https://pythonspeed.com/articles/centos-8-is-dead/

Author: deluan

.github/workflows/test.yml

@@ -28,12 +28,6 @@ jobs:
       - uses: actions/checkout@v1
       - name: Test in Alpine
         run: ./test.sh alpine
-  test-centos:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-      - name: Test in CentOS
-        run: ./test.sh centos
   test-debian:
     runs-on: ubuntu-latest
     steps:

README.md

@@ -6,7 +6,7 @@
 
 
 This is a script to automate [Oh My Zsh](https://ohmyz.sh/) installation in development containers.
-Works with any image based on Alpine, Ubuntu, Debian, CentOS or Amazon Linux.
+Works with any image based on Alpine, Ubuntu, Debian or Amazon Linux.
 
 The original goal was to simplify setting up `zsh` and Oh My Zsh in a Docker image for use with [VSCode's Remote Containers
 extension](https://code.visualstudio.com/docs/remote/containers), but it can be used whenever you

docker-compose.yml

@@ -31,8 +31,3 @@ services:
     image: amazonlinux:latest
     entrypoint: /bin/sh
     command: -c "while sleep 1000; do :; done"
-
-  test-centos:
-    image: centos:latest
-    entrypoint: /bin/sh
-    command: -c "while sleep 1000; do :; done"

test.sh

@@ -43,7 +43,7 @@ test_suite() {
     docker-compose stop -t 1 test-$image_name
 }
 
-images=${*:-"alpine centos ubuntu ubuntu-14.04 debian amazonlinux"}
+images=${*:-"alpine ubuntu ubuntu-14.04 debian amazonlinux"}
 
 for image in $images; do
     test_suite $image

zsh-in-docker.sh

@@ -65,13 +65,10 @@ install_dependencies() {
         alpine)
             $Sudo apk add --update --no-cache git curl zsh
         ;;
-        centos | amzn)
+        amzn)
             $Sudo yum update -y
-            $Sudo yum install -y git curl
+            $Sudo yum install -y git curl zsh
             $Sudo yum install -y ncurses-compat-libs # this is required for AMZN Linux (ref: https://github.com/emqx/emqx/issues/2503)
-            $Sudo curl http://mirror.ghettoforge.org/distributions/gf/el/7/plus/x86_64/zsh-5.1-1.gf.el7.x86_64.rpm > zsh-5.1-1.gf.el7.x86_64.rpm
-            $Sudo rpm -i zsh-5.1-1.gf.el7.x86_64.rpm
-            $Sudo rm zsh-5.1-1.gf.el7.x86_64.rpm
         ;;
         *)
             $Sudo apt-get update