Common-utils: Fixes "No package jq available" errors for CentOS (#644)

* add checks for "jq"

* install epel-release if necessary

* clean up epel-release post installation of "jq"

src/common-utils/devcontainer-feature.json

 {
     "id": "common-utils",
-    "version": "2.1.0",
+    "version": "2.1.1",
     "name": "Common Utilities",
     "documentationURL": "https://github.com/devcontainers/features/tree/main/src/common-utils",
     "description": "Installs a set of common command line utilities, Oh My Zsh!, and sets up a non-root user.",

src/common-utils/main.sh

@@ -175,6 +175,11 @@ install_redhat_packages() {
         man-db \
         strace"
 
+    local install_cmd=dnf
+    if ! type dnf > /dev/null 2>&1; then
+        install_cmd=yum
+    fi
+
     # rockylinux:9 installs 'curl-minimal' which clashes with 'curl'
     # Install 'curl' for every OS except this rockylinux:9
     if [[ "${ID}" = "rocky" ]] && [[ "${VERSION}" != *"9."* ]]; then
@@ -201,16 +206,23 @@ install_redhat_packages() {
         package_list="${package_list} zsh"
     fi
 
-    local install_cmd=dnf
-    if ! type dnf > /dev/null 2>&1; then
-        install_cmd=yum
+    # Install EPEL repository if needed (required to install 'jq' for CentOS)
+    local remove_epel="false"
+    if ! ${install_cmd} -q list jq >/dev/null 2>&1; then
+        ${install_cmd} -y install epel-release
+        remove_epel="true"
     fi
+
     ${install_cmd} -y install ${package_list}
 
     # Get to latest versions of all packages
     if [ "${UPGRADE_PACKAGES}" = "true" ]; then
         ${install_cmd} upgrade -y
     fi
+
+    if [[ "${remove_epel}" = "true" ]]; then
+        ${install_cmd} -y remove epel-release
+    fi
 }
 
 # Alpine Linux packages

test/common-utils/centos-7.sh

@@ -9,6 +9,7 @@ source dev-container-features-test-lib
 . /etc/os-release
 check "non-root user" test "$(whoami)" = "devcontainer"
 check "distro" test "${VERSION_ID}" = "7"
+check "jq" jq  --version
 
 # Report result
 reportResults
\ No newline at end of file

test/common-utils/fedora.sh

@@ -9,6 +9,7 @@ source dev-container-features-test-lib
 . /etc/os-release
 check "non-root user" test "$(whoami)" = "devcontainer"
 check "distro" test "${ID}" = "fedora"
+check "jq" jq  --version
 
 # Report result
 reportResults
\ No newline at end of file

test/common-utils/mariner.sh

@@ -9,6 +9,7 @@ source dev-container-features-test-lib
 . /etc/os-release
 check "non-root user" test "$(whoami)" = "devcontainer"
 check "distro" test "${ID}" = "mariner"
+check "jq" jq  --version
 
 # Report result
 reportResults
\ No newline at end of file

test/common-utils/rocky-8.sh

@@ -10,6 +10,7 @@ source dev-container-features-test-lib
 check "non-root user" test "$(whoami)" = "devcontainer"
 check "distro" test "${PLATFORM_ID}" = "platform:el8"
 check "curl" curl --version
+check "jq" jq  --version
 
 # Report result
 reportResults
\ No newline at end of file

test/common-utils/rocky-9.sh

@@ -10,6 +10,7 @@ source dev-container-features-test-lib
 check "non-root user" test "$(whoami)" = "devcontainer"
 check "distro" test "${PLATFORM_ID}" = "platform:el9"
 check "curl" curl --version
+check "jq" jq  --version
 
 # Report result
 reportResults
\ No newline at end of file