Copier Installation

#!/bin/bash
# Wrapper script to run Copier in a container
# Usage: ./copier.sh copy <template-url-or-path> <destination> [options]
#        ./copier.sh update [destination] [options]

set -e

IMAGE_NAME="ngss-copier"
IMAGE_TAG="latest"

# Build image if it doesn't exist
if ! docker image inspect "${IMAGE_NAME}:${IMAGE_TAG}" &>/dev/null; then
    echo "Building Copier Docker image..."
    docker build -t "${IMAGE_NAME}:${IMAGE_TAG}" - << 'DOCKERFILE'
FROM python:3.12-slim
RUN apt-get update && apt-get install -y --no-install-recommends git && rm -rf /var/lib/apt/lists/*
RUN pip install --no-cache-dir copier>=9.7.0 copier-templates-extensions>=0.3.0 pyyaml>=6.0
RUN git config --global --add safe.directory '*' && \
    git config --global credential.helper 'store --file=/root/.git-credentials' && \
    git config --global init.defaultBranch main
ENV GIT_TERMINAL_PROMPT=0
WORKDIR /project
ENTRYPOINT ["copier"]
CMD ["--help"]
DOCKERFILE
fi

# Parse arguments to find and resolve paths
ARGS=()
DEST_PATH=""
SRC_PATH=""
CMD=""
POSITIONAL_COUNT=0

for arg in "$@"; do
    if [[ -z "$CMD" && "$arg" =~ ^(copy|update|recopy)$ ]]; then
        CMD="$arg"
        ARGS+=("$arg")
    elif [[ "$CMD" == "copy" || "$CMD" == "recopy" ]] && [[ ! "$arg" =~ ^- ]]; then
        POSITIONAL_COUNT=$((POSITIONAL_COUNT + 1))
        if [[ $POSITIONAL_COUNT -eq 1 ]]; then
            # First positional after copy is source (template)
            if [[ "$arg" =~ ^https?:// ]] || [[ "$arg" =~ ^git@ ]] || [[ "$arg" =~ ^gh: ]]; then
                # Remote URL, pass through
                ARGS+=("$arg")
            elif [[ -d "$arg" ]]; then
                # Local directory - resolve and mount
                SRC_PATH="$(cd "$arg" && pwd)"
                ARGS+=("/src")
            else
                # Might be a git ref, pass through
                ARGS+=("$arg")
            fi
        elif [[ $POSITIONAL_COUNT -eq 2 ]]; then
            # Second positional is destination
            if [[ -d "$arg" ]]; then
                DEST_PATH="$(cd "$arg" && pwd)"
            else
                mkdir -p "$arg"
                DEST_PATH="$(cd "$arg" && pwd)"
            fi
            ARGS+=("/dest")
        else
            ARGS+=("$arg")
        fi
    elif [[ "$CMD" == "update" ]] && [[ -z "$DEST_PATH" ]] && [[ ! "$arg" =~ ^- ]] && [[ -d "$arg" ]]; then
        # For update, first path-like arg is destination
        DEST_PATH="$(cd "$arg" && pwd)"
        ARGS+=("/dest")
    else
        ARGS+=("$arg")
    fi
done

# Default destination to current directory if not specified
if [[ -z "$DEST_PATH" ]]; then
    DEST_PATH="$(pwd)"
    if [[ "$CMD" == "update" ]]; then
        ARGS+=("/dest")
    fi
fi

# Build docker run args
DOCKER_ARGS=(
    --rm -it
    -v "${DEST_PATH}:/dest"
    -v "${HOME}/.gitconfig:/root/.gitconfig:ro"
    -v "${HOME}/.ssh:/root/.ssh:ro"
    -e "GIT_AUTHOR_NAME=${GIT_AUTHOR_NAME:-$(git config user.name 2>/dev/null || echo '')}"
    -e "GIT_AUTHOR_EMAIL=${GIT_AUTHOR_EMAIL:-$(git config user.email 2>/dev/null || echo '')}"
    -e "GIT_COMMITTER_NAME=${GIT_COMMITTER_NAME:-$(git config user.name 2>/dev/null || echo '')}"
    -e "GIT_COMMITTER_EMAIL=${GIT_COMMITTER_EMAIL:-$(git config user.email 2>/dev/null || echo '')}"
    # Override macOS credential helper with store helper
    -e "GIT_CONFIG_COUNT=1"
    -e "GIT_CONFIG_KEY_0=credential.helper"
    -e "GIT_CONFIG_VALUE_0=store --file=/root/.git-credentials"
)

# Mount source template if it's a local path
if [[ -n "$SRC_PATH" ]]; then
    DOCKER_ARGS+=(-v "${SRC_PATH}:/src:ro")
fi

# Mount git-credentials if it exists
if [[ -f "${HOME}/.git-credentials" ]]; then
    DOCKER_ARGS+=(-v "${HOME}/.git-credentials:/root/.git-credentials:ro")
fi

# Mount copier settings.yml if it exists (check platform-specific locations)
COPIER_SETTINGS=""
if [[ -f "${HOME}/Library/Application Support/copier/settings.yml" ]]; then
    # macOS
    COPIER_SETTINGS="${HOME}/Library/Application Support/copier/settings.yml"
elif [[ -f "${HOME}/.config/copier/settings.yml" ]]; then
    # Linux
    COPIER_SETTINGS="${HOME}/.config/copier/settings.yml"
fi
if [[ -n "$COPIER_SETTINGS" ]]; then
    # Mount to Linux config location inside container
    DOCKER_ARGS+=(-v "${COPIER_SETTINGS}:/root/.config/copier/settings.yml:ro")
fi

# Run copier
docker run "${DOCKER_ARGS[@]}" "${IMAGE_NAME}:${IMAGE_TAG}" "${ARGS[@]}"