Fix problem where container home was seperate for each project dir

The problem was that we mounted `pwd` as HOME and that meant that
every time git was used it would look into the data and work for a
long time, and it would also commit everything there.

Now we have a central container-home directory in the directory
where we checked out this git repo and it is used by each session
independent of in which project directory we are.

.gitignore

@@ -1 +1,2 @@
-data
+container-home/*
+!container-home/.gitkeep

Dockerfile

@@ -1,31 +1,31 @@
 FROM archlinux:latest
 
-# Build args for user
 ARG USERNAME=dev
 ARG UID=1000
 ARG GID=1000
 
-# Install basic tools
 RUN pacman -Syu --noconfirm \
+        base-devel \
         git \
         ca-certificates \
-        curl \
         bash \
-    && pacman -Scc --noconfirm
+        less \
+        ripgrep && \
+    groupadd -g ${GID} ${USERNAME} && \
+    useradd -m -u ${UID} -g ${GID} -s /bin/bash ${USERNAME} && \
+    pacman -Scc --noconfirm
 
-# Create user
-RUN groupadd -g ${GID} ${USERNAME} && \
-    useradd -m -u ${UID} -g ${GID} -s /bin/bash ${USERNAME}
+WORKDIR /tmp
+USER ${USERNAME}
+
+RUN git clone https://aur.archlinux.org/opencode-bin.git && \
+    cd opencode-bin && \
+    makepkg --noconfirm
+
+USER root
+RUN pacman -U --noconfirm /tmp/opencode-bin/*.pkg.tar.zst && \
+    rm -rf /tmp/opencode-bin && \
+    pacman -Scc --noconfirm
 
-# Switch to non-root user
 USER ${USERNAME}
 WORKDIR /home/${USERNAME}
-
-# Install OpenCode CLI via official installer
-RUN curl -fsSL https://opencode.ai/install | bash
-
-# Add OpenCode CLI to PATH
-ENV PATH="/home/${USERNAME}/.opencode/bin:${PATH}"
-
-# Default working directory
-WORKDIR /home/${USERNAME}

README.md

@@ -24,6 +24,11 @@ git clone https://git.jeena.net/jeena/opencode-container.git
 Source the helper file `opencode.aliases` in your shell configuration  
 (`.bashrc` or `.zshrc`) so the `opencode` function is available in new sessions.
 
+We set up the ./container-home directory as a central $HOME inside of the
+container, independent of the session or project directory we start in. This
+presists the whole $HOME from inside the container so everything opencode
+writes into config files, etc. presists there.
+
 ## Usage
 
 From any project directory:

docker-compose.yaml

@@ -15,12 +15,11 @@ services:
     tty: true
 
     environment:
-      HOME: "${PWD}/data"
       UID: "${UID}"
       GID: "${GID}"
 
     volumes:
-      # Current project (read–write)
+      - "${CONTAINER_HOME}:/home/${USER}/"
       - "${PWD}:${PWD}"
 
     cap_drop:

opencode.aliases

@@ -7,10 +7,11 @@ opencode() {
     UID="$uid" \
     GID="$gid" \
     USER="$user" \
+    CONTAINER_HOME="$OPENCODE_CONTAINER_DIR/container-home" \
     docker compose \
         -f "$OPENCODE_CONTAINER_DIR/docker-compose.yaml" \
         run --rm \
         -u "$uid:$gid" \
-        opencode /home/"$user"/.opencode/bin/opencode "$@" \
+        opencode opencode "$@" \
         2> >(grep -v "No services to build" >&2)
 }