# Build from source using a multi-stage build
FROM node:lts-bookworm AS builder
WORKDIR /workspace

# Install yarn globally as required by the project setup
RUN npm install -g yarn

# Install dependencies first to leverage caching
COPY package.json .
RUN yarn install

# Copy the rest of the source and build the project
COPY . .
RUN yarn build

# Final runtime image
FROM node:lts-bookworm
WORKDIR /workspace

# Copy the built artifacts from the builder stage
COPY --from=builder /workspace/dist /workspace/dist

ENV NODE_ENV=production

# Default command: expose the built library
# Running dist/esm/index.js will import the library; this is a safe no-op script
CMD ["node", "dist/esm/index.js"]

# Ignore node_modules and build outputs
node_modules/
dist/
.env
*.log
.DS_Store
npm-debug.log*
yarn-error.log*

Summary of Docker build error

- Failing step
  - [builder 3/7] RUN npm install -g yarn (Dockerfile: line 6)

- Exit code
  - did not complete successfully: exit code: 1

- Exact error messages (preserved)
  - npm error code EEXIST
  - npm error path /usr/local/bin/yarn
  - npm error EEXIST: file already exists
  - npm error File exists: /usr/local/bin/yarn
  - npm error Remove the existing file and try again, or run npm
  - npm error with --force to overwrite files recklessly.
  - A complete log of this run can be found in: /root/.npm/_logs/2026-03-18T14_40_36_354Z-debug-0.log

- Missing packages/files mentioned
  - Conflict due to an existing file: /usr/local/bin/yarn

- Version mismatch / notices
  - npm notice New minor version of npm available! 11.9.0 -> 11.11.1
  - npm notice To update run: npm install -g npm@11.11.1

- Additional context
  - The failure occurs during the npm install -g yarn step, which cannot overwrite the existing /usr/local/bin/yarn without force or removing the file.

# Build from source using a multi-stage build
FROM node:lts-bookworm AS builder
WORKDIR /workspace

# Install yarn globally as required by the project setup if not already present
RUN if command -v yarn >/dev/null 2>&1; then echo "yarn already installed"; else npm install -g yarn; fi

# Install dependencies first to leverage caching
COPY package.json .
RUN yarn install

# Copy the rest of the source and build the project
COPY . .
RUN yarn build

# Final runtime image
FROM node:lts-bookworm
WORKDIR /workspace

# Copy the built artifacts from the builder stage
COPY --from=builder /workspace/dist /workspace/dist

ENV NODE_ENV=production

# Default command: a lightweight no-op to verify the container starts
CMD ["node", "-e", "console.log('redlock library built and ready')"]