Add support for viewing/entering tar.gz archives in mc without extens…

…ions (like Docker build cache files)

docker/ci-runner/Dockerfile

@@ -20,7 +20,7 @@ RUN true \
     && apt-get install -y --no-install-recommends \
       openssh-client \
       build-essential haproxy rinetd \
-      awscli jq gh rsync python3 python3-yaml rsyslog systemctl tzdata gosu less mc git curl wget pv psmisc unzip vim nano telnet net-tools apt-transport-https ca-certificates locales gnupg lsb-release
+      awscli jq gh rsync python3 python3-yaml rsyslog systemctl tzdata gosu less mc git curl wget pv psmisc unzip zstd file vim nano telnet net-tools apt-transport-https ca-certificates locales gnupg lsb-release
 
 # Install & patch Docker-in-Docker service. Requires sysbox installed on the host. See also:
 # https://forums.docker.com/t/etc-init-d-docker-62-ulimit-error-setting-limit-invalid-argument-problem/139424

docker/ci-runner/root/entrypoint.10-mc-vfs.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+#
+# Configures MC VSF parameters.
+#
+set -u -e
+
+for file in /etc/mc/mc.ext /root/.config/mc/mc.ext; do
+  if [[ -f $file ]] && ! grep -q "/POSIX tar archive" /etc/mc/mc.ext; then
+    sed -i $"1i type/POSIX tar archive\n  Open=%cd %p/utar://\n  View=%view{ascii} tar tf \"\${MC_EXT_FILENAME}\"\n" $file
+  fi
+done

docker/ci-storage/Dockerfile

@@ -11,7 +11,7 @@ RUN true \
     && apt-get update -y \
     && apt-get install -y --no-install-recommends \
       openssh-server \
-      awscli jq gh rsync python3 python3-yaml rsyslog systemctl tzdata gosu less mc git curl wget pv psmisc unzip vim nano telnet net-tools apt-transport-https ca-certificates locales gnupg lsb-release \
+      awscli jq gh rsync python3 python3-yaml rsyslog systemctl tzdata gosu less mc git curl wget pv psmisc unzip zstd file vim nano telnet net-tools apt-transport-https ca-certificates locales gnupg lsb-release \
     && sed -i -e "s|#PermitRootLogin.*|PermitRootLogin no|" /etc/ssh/sshd_config \
     && useradd -m guest -s /bin/bash \
     && mkdir ~guest/.ssh && chmod 700 ~guest/.ssh \

docker/ci-storage/root/entrypoint.10-mc-vfs.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+#
+# Configures MC VSF parameters.
+#
+set -u -e
+
+for file in /etc/mc/mc.ext /root/.config/mc/mc.ext; do
+  if [[ -f $file ]] && ! grep -q "/POSIX tar archive" /etc/mc/mc.ext; then
+    sed -i $"1i type/POSIX tar archive\n  Open=%cd %p/utar://\n  View=%view{ascii} tar tf \"\${MC_EXT_FILENAME}\"\n" $file
+  fi
+done