From 63ac1aae830242867f331a79bf3f9589f7a7fb17 Mon Sep 17 00:00:00 2001
From: Job79 <job@plabble.org>
Date: Sun, 29 Sep 2024 16:48:50 +0200
Subject: [PATCH] feat: handle automatically updates with enter.sh

---
 build.sh |   2 +-
 enter.sh | 109 +++++++++++++++++++++++++++++++++++++++++++++++--------
 2 files changed, 94 insertions(+), 17 deletions(-)

diff --git a/build.sh b/build.sh
index 4944990..be40679 100755
--- a/build.sh
+++ b/build.sh
@@ -1,2 +1,2 @@
 #!/bin/sh
-podman build . -t dev
+podman build . $@ -t git.plabble.org/job79/dev
diff --git a/enter.sh b/enter.sh
index 62874ca..20a47cb 100755
--- a/enter.sh
+++ b/enter.sh
@@ -1,17 +1,94 @@
 #!/bin/sh
-name="${1:-dev}"
-podman container rm -f -t 1 "$name"
-podman pull git.plabble.org/job79/dev:latest
-podman run -it \
-  --name "$name" \
-  -v /run/user/1000/wayland-0:/run/user/1000/wayland-0 \
-  -v "$SSH_AUTH_SOCK":/run/user/1000/ssh-auth-sock \
-  -v ~/Documents:/home/user/Documents \
-  -v ~/.ssh:/home/user/.ssh \
-  -v ~/.config/git:/home/user/.config/git \
-  -v "$name"-copilot:/home/user/.config/github-copilot \
-  -v "$name"-local:/home/user/.local \
-  -v "$name"-cache:/home/user/.cache \
-  --security-opt label=disable \
-  --userns=keep-id \
-  git.plabble.org/job79/dev:latest
+# =============================================== #
+# enter.sh v1.0; job79                            #
+# Enter into an existing or new dev container and #
+# automatically handle dev container updates.     #
+# =============================================== #
+set -e
+
+# podman_run opens a shell into a newly created dev container.
+podman_run() {
+  args="--name $name"
+  arg() { args="$args $@"; }
+
+  # Automatically update the container when a newer
+  # image is available.
+  [ "$no_pull" = 1 ] || arg "--pull newer"
+
+  # Disable some security settings to make it possible to mount
+  # host directories without problems.
+  arg "--security-opt label=disable" # disable labeling so mounts don't need to be labbeled.
+  arg "--userns=keep-id"             # required for ~/.ssh which is usually 700.
+
+  # Mount the wayland socket. Required to get the system
+  # clipbard (wl-copy) working.
+  arg "-v /run/user/$UID/wayland-0:/run/user/1000/wayland-0"
+
+  # Mount the ssh socket, directory and git directory. This
+  # gets the host ssh and git configuration working inside
+  # the container.
+  arg "-v $SSH_AUTH_SOCK:/run/user/1000/ssh-auth-sock"
+  [ -d ~/.ssh ] && arg "-v $HOME/.ssh:/home/user/.ssh"
+  [ -d ~/.config/git ] && arg "-v $HOME/.config/git:/home/user/.config/git"
+
+  # Mount host directories with programming projects.
+  [ -d ~/Documents ] && arg "-v $HOME/Documents:/home/user/Documents"
+  [ -d ~/.dev ] && arg "-v $HOME/.dev:/home/user/.dev"
+
+  # Add volumes for .local and .cache so these survive
+  # container restarts.
+  arg "-v $name-local:/home/user/.local"
+  arg "-v $name-cache:/home/user/.cache"
+  podman run -it $args "$image"
+}
+
+# podman_exec opens a shell into an existing dev container.
+podman_exec() { podman exec -it "$name" bash -l; }
+
+# podman_start starts a stopped existing dev container.
+podman_start() { podman start "$name" 1>/dev/null; }
+
+# podman_delete deletes a dev container.
+podman_delete() { podman container rm -f -t 1 "$name" 1>/dev/null; }
+
+### MAIN ###
+name="dev"
+image="git.plabble.org/job79/dev:latest"
+
+while test $# -gt 0; do
+  case "$1" in
+  --recreate | -r) podman_delete ;;
+  --no-pull | -np) no_pull=1 ;;
+  -*) echo "unknown option '$1'" ;;
+  *) name="$1" ;;
+  esac
+  shift
+done
+
+if ! podman container exists "$name"; then
+  podman_run
+  exit
+fi
+
+if [ "$(podman container inspect "$name" -f {{.State.Running}} 2>&1)" = 'true' ]; then
+  podman_exec
+  exit
+fi
+
+if [ "$no_pull" = 1 ]; then
+  podman_start
+  podman_exec
+  exit
+fi
+
+iid="$(podman image inspect "$image" -f {{.Id}})"
+podman pull -q "$image" 1>/dev/null
+if [ "$(podman image inspect "$image" -f {{.Id}})" != "$iid" ]; then
+  # When container is stopped and a newer image is available,
+  # recreate the container instead of starting the existing one.
+  podman_delete
+  podman_run
+else
+  podman_start
+  podman_exec
+fi