chore: more control of claude command, isolated entrypoint

entrypoint.sh.example

@@ -0,0 +1,73 @@
+#!/bin/bash
+set -e
+
+# Install nvm if not already present in the home volume.
+if [ ! -s "$NVM_DIR/nvm.sh" ]; then
+  echo "nvm not found — running installer..."
+  curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/HEAD/install.sh |
+    NVM_DIR="$NVM_DIR" PROFILE=/dev/null bash
+  echo "nvm installed successfully."
+fi
+. "$NVM_DIR/nvm.sh"
+
+# Install rbenv + ruby-build if not already present in the home volume.
+if [ ! -d "$RBENV_ROOT/bin" ]; then
+  echo "rbenv not found — installing..."
+  git clone --depth=1 https://github.com/rbenv/rbenv.git "$RBENV_ROOT"
+  git clone --depth=1 https://github.com/rbenv/ruby-build.git "$RBENV_ROOT/plugins/ruby-build"
+  echo "rbenv installed successfully."
+fi
+eval "$(rbenv init - bash)"
+
+# Determine the desired Ruby version: prefer .ruby-version in the workspace,
+# fall back to the rbenv global setting, then a hardcoded default.
+if [ -f "/code/.ruby-version" ]; then
+  RUBY_VERSION=$(tr -d '[:space:]' </code/.ruby-version)
+elif [ -f "$RBENV_ROOT/version" ]; then
+  RUBY_VERSION=$(cat "$RBENV_ROOT/version")
+else
+  RUBY_VERSION="3.3.6"
+fi
+
+# Install the Ruby version if it isn't already built.
+if ! rbenv versions --bare 2>/dev/null | grep -qx "$RUBY_VERSION"; then
+  echo "Ruby $RUBY_VERSION not found — installing (this may take a few minutes)..."
+  rbenv install "$RUBY_VERSION"
+  echo "Ruby $RUBY_VERSION installed."
+fi
+rbenv global "$RUBY_VERSION"
+
+# Ensure bundler is available for this Ruby version.
+if ! gem list bundler -i &>/dev/null; then
+  gem install bundler --no-document
+fi
+
+# Install gem dependencies for the linked workspace so rspec (and other gems)
+# are available without needing an explicit `bundle install` step.
+if [ -f "/code/Gemfile" ]; then
+  echo "Gemfile found — running bundle install..."
+  pushd /code
+  BUNDLE_GEMS__GRAPHQL__PRO="gql_2e0_d66f5103067:70c113ba329" bundle install
+  popd
+fi
+
+# Install Claude Code if not already present in the home volume.
+# Because the home directory is a volume, this install persists across
+# container restarts and rebuilds.
+if ! command -v claude &>/dev/null; then
+  echo "Claude Code not found — running installer..."
+  curl -fsSL https://claude.ai/install.sh | bash
+  echo "Claude Code installed successfully."
+else
+  echo "Claude Code $(claude --version 2>/dev/null || echo '(version unknown)') ready."
+fi
+
+# Proxy host postgres to 127.0.0.1:5432 inside the container so the app can
+# use the same DATABASE_URL whether running inside or outside Docker.
+if ! ss -tlnp 2>/dev/null | grep -q ':5432'; then
+  echo "Starting postgres proxy 127.0.0.1:5432 -> host.docker.internal:5432"
+  socat TCP-LISTEN:5432,bind=127.0.0.1,fork,reuseaddr \
+    TCP:host.docker.internal:5432 &
+fi
+
+exec "$@"