Adds scripts to work with our dev containers.

scripts/container-shell.sh

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+#!/bin/bash
+# Open interactive shell in 3DS development container
+# Usage: ./scripts/container-shell.sh [project-path] [podman-args...]
+#
+# All arguments after project-path are passed to podman/docker run before the container name
+# This allows mounting additional volumes, setting environment variables, etc.
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Print colored message
+print_msg() {
+    local color=$1
+    shift
+    echo -e "${color}$*${NC}"
+}
+
+# Print usage
+usage() {
+    cat << 'EOF'
+Usage: ./scripts/container-shell.sh [project-path] [podman-args...]
+
+Open interactive bash shell in 3DS development container with project mounted.
+
+Arguments:
+  project-path    Path to project directory (default: current directory)
+  podman-args     Additional arguments passed to podman/docker run
+
+Examples:
+  # Shell in current directory
+  ./scripts/container-shell.sh
+
+  # Shell in specific project
+  ./scripts/container-shell.sh ~/my-3ds-game
+
+  # With additional volume mount
+  ./scripts/container-shell.sh ~/my-game -v /data:/data:z
+
+  # With environment variable
+  ./scripts/container-shell.sh ~/my-game -e DEBUG=1
+
+  # Multiple extra arguments
+  ./scripts/container-shell.sh ~/my-game -v /data:/data:z -e DEBUG=1 --network=host
+
+Inside the container:
+  - Project is mounted at /project
+  - Working directory is /project
+  - All devkitARM tools are in PATH
+  - Run 'make' to build your project
+  - Run 'exit' or Ctrl+D to leave
+
+Environment Variables:
+  CONTAINER_RUNTIME   Container runtime to use (podman or docker, default: auto-detect)
+
+EOF
+    exit 1
+}
+
+# Detect container runtime
+detect_runtime() {
+    if [ -n "$CONTAINER_RUNTIME" ]; then
+        echo "$CONTAINER_RUNTIME"
+        return
+    fi
+    
+    if command -v podman &> /dev/null; then
+        echo "podman"
+    elif command -v docker &> /dev/null; then
+        echo "docker"
+    else
+        print_msg "$RED" "Error: Neither podman nor docker found in PATH"
+        print_msg "$YELLOW" "Please install podman (recommended) or docker"
+        exit 1
+    fi
+}
+
+# Main
+main() {
+    # Show help
+    if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
+        usage
+    fi
+    
+    # Determine project path
+    local project_path="${1:-.}"
+    shift || true  # Remove first arg if present, don't fail if no args
+    
+    # Resolve absolute path
+    project_path=$(cd "$project_path" 2>/dev/null && pwd) || {
+        print_msg "$RED" "Error: Project path does not exist: ${1:-.}"
+        exit 1
+    }
+    
+    # Collect remaining arguments for podman/docker run
+    local extra_args=("$@")
+    
+    local runtime
+    runtime=$(detect_runtime)
+    
+    local image_name="tomusan/devkitarm-3ds:latest"
+    
+    print_msg "$BLUE" "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    print_msg "$GREEN" "3DS Development Container Shell"
+    print_msg "$BLUE" "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo
+    print_msg "$YELLOW" "Project:  $project_path"
+    print_msg "$YELLOW" "Runtime:  $runtime"
+    print_msg "$YELLOW" "Image:    $image_name"
+    if [ ${#extra_args[@]} -gt 0 ]; then
+        print_msg "$YELLOW" "Extra:    ${extra_args[*]}"
+    fi
+    echo
+    print_msg "$GREEN" "Type 'exit' or press Ctrl+D to leave the container"
+    echo
+    print_msg "$BLUE" "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo
+    
+    # Run container with interactive shell
+    # Project mounted to /project, any extra args passed to podman/docker run
+    "$runtime" run -it --rm \
+        -v "$project_path:/project:z" \
+        "${extra_args[@]}" \
+        "$image_name" \
+        bash
+}
+
+main "$@"