FROM python:3.13-slim

ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# System dependencies for building Python packages
RUN apt-get update && \
    apt-get install -y --no-install-recommends build-essential gcc libffi-dev && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install build tooling for Flit-based packages
RUN python -m pip install --no-cache-dir --upgrade pip setuptools wheel
RUN python -m pip install --no-cache-dir flit_core>=3.11,<4

# Copy source
COPY . .

# Install the package from source
RUN pip install --no-cache-dir .

# Simple smoke test to verify installation (will run on container start)
CMD ["python", "-c", "import pypdf; print(pypdf.__version__)" ]

# Exclude VCS metadata
.git

# Python cache and build artifacts
__pycache__/
*.pyc
*.pyo
*.pyd
*.class

# Virtual environments
venv/
env/
ENV/
.env/

# Build artifacts
build/
dist/
*.egg-info/

# Pytest / caches
.pytest_cache/
.mypy_cache/
.coverage*

# Documentation and tests (not needed for runtime image)
docs/
tests/
.GitHub/
.gitrepo/

# Misc
*.log
*.tmp
*.swp
*.DS_Store

# Node modules (not used here but common in ignore lists)
node_modules/

- Exact error message and exit code
  - /bin/sh: 1: cannot open 4: No such file
  - ERROR: failed to build: failed to solve: process "/bin/sh -c python -m pip install --no-cache-dir flit_core>=3.11,<4" did not complete successfully: exit code: 2

- Failing command/step
  - [5/7] RUN python -m pip install --no-cache-dir flit_core>=3.11,<4

- Missing packages or files mentioned
  - The error arises because the shell treats "<4" as input redirection and tries to open a file named "4"; file "4" does not exist.
  - No actual package/file download failure is shown for flit_core; the issue is shell redirection due to the unquoted version spec flit_core>=3.11,<4.

- Version mismatch info
  - No explicit version-mismatch error is reported. The version constraint flit_core>=3.11,<4 is present, but the failure is caused by shell interpretation of "<".

- Context note
  - Base image shown earlier is python:3.13-slim; the failure occurs at the step attempting to install flit_core with a version range.

FROM python:3.13-slim

ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# System dependencies for building Python packages
RUN apt-get update && \
    apt-get install -y --no-install-recommends build-essential gcc libffi-dev && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install build tooling for Flit-based packages
RUN python -m pip install --no-cache-dir --upgrade pip setuptools wheel
RUN python -m pip install --no-cache-dir "flit_core>=3.11,<4"

# Copy source
COPY . .

# Install the package from source
RUN pip install --no-cache-dir .

# Simple smoke test to verify installation (will run on container start)
CMD ["python", "-c", "import pypdf; print(pypdf.__version__)" ]

FROM python:3.12-slim

ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# System dependencies for building Python packages
RUN apt-get update && \
    apt-get install -y --no-install-recommends build-essential gcc libffi-dev && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install build tooling for Flit-based packages
RUN python -m pip install --no-cache-dir --upgrade pip setuptools wheel
RUN python -m pip install --no-cache-dir "flit_core>=3.11,<4"

# Copy source
COPY . .

# Install the package from source
RUN pip install --no-cache-dir .

# Simple smoke test to verify installation (will run on container start)
CMD ["python", "-c", "import pypdf; print(pypdf.__version__)" ]

FROM python:3.12-slim

ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# System dependencies for building Python packages
RUN apt-get update && \
    apt-get install -y --no-install-recommends build-essential gcc libffi-dev && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install build tooling for Flit-based packages
RUN python -m pip install --no-cache-dir --upgrade pip setuptools wheel
RUN python -m pip install --no-cache-dir "flit_core>=3.11,<4"

# Copy source
COPY . .

# Install the package from source
RUN pip install --no-cache-dir .

# Create a small verification script to run at container start
RUN printf 'import pypdf\nprint(pypdf.__version__)\n' > /app/verify.py

# Simple smoke test to verify installation (will run on container start)
CMD ["python", "/app/verify.py"]

# Use a lightweight Python base image
FROM python:3.12-slim

# Prevent Python from writing pyc files and ensure stdout is unbuffered
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy metadata and source
COPY pyproject.toml ./
COPY pypdf ./pypdf

# Install the package from source
RUN python -m pip install --upgrade pip && \
    python -m pip install .

# Simple smoke test to verify the install
CMD ["python", "-c", "import pypdf, sys; print('pypdf', pypdf.__version__); print('Python', sys.version)"]

Summary (under 1500 chars):

- Failing step: [5/5] RUN python -m pip install --upgrade pip &&     python -m pip install .
- Exit code: 1

- Exact error messages:
  - FileNotFoundError: [Errno 2] No such file or directory: 'README.md'
  - flit_core.config.ConfigError: Description file README.md does not exist
  - ERROR: Failed to build 'file:///app' when getting requirements to build wheel

- Missing packages or files mentioned:
  - README.md is missing; the build expects a README.md for the package description (pep621 metadata via flit_core)

- Version mismatch / changes observed:
  - Pip is upgraded within the RUN: updated from 25.0.1 to 26.0.1 (pip 25.0.1 installed, then uninstalled, then pip-26.0.1 installed)
  - Run includes a root-user warnings note about pip

- Context notes:
  - Base image used is python:3.12-slim
  - The error originates during building wheel requirements for the project in /app due to missing README.md referenced by flit_core's pep621 metadata.

# Use a lightweight Python base image
FROM python:3.12-slim

# Prevent Python from writing pyc files and ensure stdout is unbuffered
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy minimal project files needed to install from source
COPY README.md ./README.md
COPY pyproject.toml ./pyproject.toml
COPY LICENSE ./LICENSE || true
COPY pypdf ./pypdf
COPY resources ./resources

# Install dependencies and build the package from source
RUN python -m pip install --upgrade pip && \
    python -m pip install .

# Smoke test of the installed package
CMD ["python", "-c", "import pypdf, sys; print('pypdf', pypdf.__version__); print('Python', sys.version)"]

#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 717B done
#1 DONE 0.1s

#2 [internal] load metadata for docker.io/library/python:3.12-slim
#2 DONE 0.3s

#3 [internal] load .dockerignore
#3 transferring context: 493B done
#3 DONE 0.1s

#4 [1/8] FROM docker.io/library/python:3.12-slim@sha256:3d5ed973e45820f5ba5e46bd065bd88b3a504ff0724d85980dcd05eab361fcf4
#4 resolve docker.io/library/python:3.12-slim@sha256:3d5ed973e45820f5ba5e46bd065bd88b3a504ff0724d85980dcd05eab361fcf4 0.1s done
#4 CANCELED

#5 [internal] load build context
#5 transferring context: 13.57MB 0.1s done
#5 DONE 0.3s

#6 [2/8] WORKDIR /app
#6 CACHED

#7 [3/8] COPY README.md ./README.md
#7 CACHED

#8 [4/8] COPY pyproject.toml ./pyproject.toml
#8 CACHED

#9 [5/8] COPY LICENSE ./LICENSE || true
#9 ERROR: failed to calculate checksum of ref mqpnlh3la2bzegxdamkvycc7g::86szpfzsaoe65gm8zvifwhlaw: "/||": not found
------
 > [5/8] COPY LICENSE ./LICENSE || true:
------
Dockerfile:13
--------------------
  11 |     COPY README.md ./README.md
  12 |     COPY pyproject.toml ./pyproject.toml
  13 | >>> COPY LICENSE ./LICENSE || true
  14 |     COPY pypdf ./pypdf
  15 |     COPY resources ./resources
--------------------
ERROR: failed to build: failed to solve: failed to compute cache key: failed to calculate checksum of ref mqpnlh3la2bzegxdamkvycc7g::86szpfzsaoe65gm8zvifwhlaw: "/||": not found

FROM python:3.12-slim

# Basic environment settings
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy minimal project files needed for installation
COPY README.md .
COPY pyproject.toml .
COPY pypdf ./pypdf
COPY resources ./resources
COPY LICENSE ./LICENSE

# Install build tools and install the package from source
RUN python -m pip install --upgrade pip setuptools wheel && \
    python -m pip install .

# Smoke test to verify the installation at runtime
CMD ["python", "-c", "import pypdf, sys; print('pypdf', pypdf.__version__); print('Python', sys.version)"]

FROM python:3.12-slim

# Basic environment settings
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy minimal project files needed to install from source
COPY README.md ./README.md
COPY pyproject.toml ./pyproject.toml
COPY pypdf ./pypdf
COPY resources ./resources

# Build and install the package from source
RUN python -m pip install --upgrade pip setuptools wheel && \
    python -m pip install .

# Smoke test to verify the installation at runtime
CMD ["python", "-c", "import pypdf, sys; print('pypdf', pypdf.__version__); print('Python', sys.version)"]

- Exact error message and exit code
  - flit_core.config.ConfigError: No files found for [project.license-files]: 'LICENSE' pattern
  - ERROR: Failed to build 'file:///app' when getting requirements to build wheel
  - did not complete successfully: exit code: 1

- Failing command/step
  - RUN python -m pip install --upgrade pip setuptools wheel &&     python -m pip install .

- Missing packages or files mentioned
  - No files found for [project.license-files]: 'LICENSE' pattern
  - Likely missing LICENSE file(s) expected by the project (license-files patterns in pyproject.toml)

- Version mismatch info
  - Base image: python:3.12-slim (Python 3.12 in the build environment)
  - The failure is due to a packaging metadata issue (license-files) rather than a runtime version mismatch; the flit_core check failing on missing LICENSE files. Notable related versions: pip 26.0.1, setuptools 82.0.1, wheel 0.46.3 (as shown in the build), but the root cause is the missing license file.

FROM python:3.12-slim

# Basic environment settings
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Install build tools (only temporary)
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
        build-essential gcc libffi-dev libssl-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy essential project files for a source install
COPY LICENSE ./LICENSE
COPY README.md ./README.md
COPY pyproject.toml ./pyproject.toml
COPY pypdf ./pypdf

# Install dependencies and build the package from source
RUN python -m pip install --upgrade pip setuptools wheel && \
    python -m pip install . && \
    # Clean up build tools to reduce image size
    apt-get purge -y --auto-remove build-essential gcc libffi-dev libssl-dev && \
    rm -rf /var/lib/apt/lists/*

# Smoke test to verify the installation at runtime
CMD ["python", "-c", "import pypdf, sys; print('pypdf', pypdf.__version__); print('Python', sys.version)" ]

FROM python:3.12-slim

# Basic environment settings
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy essential project files for installation
COPY README.md ./README.md
COPY pyproject.toml ./pyproject.toml
COPY pypdf ./pypdf
COPY resources ./resources
COPY LICENSE ./LICENSE
COPY verify.py ./verify.py

# Install build tools are not strictly required for pure Python, but we'll ensure wheel support
RUN python -m pip install --upgrade pip setuptools wheel && \
    python -m pip install .

# Smoke test via a small script to verify installation
CMD ["python", "verify.py"]

# Ignore python bytecode and caches
__pycache__/
*.pyc
*.pyo
*.pyd

# Virtual environments
venv/
.env/
ENV/
.envs/

# Build artifacts
build/
dist/
*.egg-info/

# Tests and docs
tests/
docs/
*.pdf

# Git data
.git/
**/.git/

# Local tooling
.coverage
.cache
.tox

# PyPI related
*.whl
*.tar.gz

# OS files
.DS_Store

#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 638B done
#1 DONE 0.1s

#2 [internal] load metadata for docker.io/library/python:3.12-slim
#2 DONE 0.2s

#3 [internal] load .dockerignore
#3 transferring context: 357B done
#3 DONE 0.1s

#4 [1/9] FROM docker.io/library/python:3.12-slim@sha256:3d5ed973e45820f5ba5e46bd065bd88b3a504ff0724d85980dcd05eab361fcf4
#4 resolve docker.io/library/python:3.12-slim@sha256:3d5ed973e45820f5ba5e46bd065bd88b3a504ff0724d85980dcd05eab361fcf4 0.1s done
#4 DONE 0.2s

#5 [2/9] WORKDIR /app
#5 ...

#6 [internal] load build context
#6 transferring context: 13.57MB 0.1s done
#6 DONE 1.1s

#5 [2/9] WORKDIR /app
#5 ...

#7 [3/9] COPY README.md ./README.md
#7 CACHED

#8 [4/9] COPY pyproject.toml ./pyproject.toml
#8 CACHED

#9 [5/9] COPY pypdf ./pypdf
#9 CACHED

#10 [6/9] COPY resources ./resources
#10 CACHED

#11 [7/9] COPY LICENSE ./LICENSE
#11 CACHED

#12 [8/9] COPY verify.py ./verify.py
#12 ERROR: failed to calculate checksum of ref mqpnlh3la2bzegxdamkvycc7g::4cl5496d6jys6r0q5yv5xtr18: "/verify.py": not found

#5 [2/9] WORKDIR /app
#5 DONE 2.1s
------
 > [8/9] COPY verify.py ./verify.py:
------
Dockerfile:15
--------------------
  13 |     COPY resources ./resources
  14 |     COPY LICENSE ./LICENSE
  15 | >>> COPY verify.py ./verify.py
  16 |     
  17 |     # Install build tools are not strictly required for pure Python, but we'll ensure wheel support
--------------------
ERROR: failed to build: failed to solve: failed to compute cache key: failed to calculate checksum of ref mqpnlh3la2bzegxdamkvycc7g::4cl5496d6jys6r0q5yv5xtr18: "/verify.py": not found

import pypdf, sys
print('pypdf_version', getattr(pypdf, '__version__', 'unknown'))
print('python_version', sys.version.split()[0])

FROM python:3.12-slim as builder

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /build

# Minimal files required to build from source
COPY README.md ./README.md
COPY pyproject.toml ./pyproject.toml
COPY LICENSE ./LICENSE
COPY pypdf ./pypdf
COPY resources ./resources

# Build wheel for distribution
RUN python -m pip install --upgrade pip setuptools wheel && \
    python -m pip wheel . -w dist

FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install the built wheel
COPY --from=builder /build/dist/*.whl /tmp/
RUN python -m pip install --no-cache-dir /tmp/*.whl

# Smoke test script to verify runtime
COPY verify.py ./verify.py

CMD ["python", "./verify.py"]

FROM python:3.12-slim as builder

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /build

# Copy minimal sources needed to build the wheel
COPY README.md ./README.md
COPY pyproject.toml ./pyproject.toml
COPY LICENSE ./LICENSE
COPY pypdf ./pypdf
COPY resources ./resources

# Build wheel
RUN python -m pip install --upgrade pip setuptools wheel
RUN python -m pip wheel . -w dist


FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install the built wheel
COPY --from=builder /build/dist/*.whl /tmp/
RUN python -m pip install --no-cache-dir /tmp/*.whl

# Verification script to confirm runtime
COPY verify.py ./verify.py

CMD ["python", "./verify.py"]

FROM python:3.12-slim as builder

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /build

# Copy minimal sources needed to build a wheel from source
COPY pyproject.toml ./pyproject.toml
COPY README.md ./README.md
COPY LICENSE ./LICENSE
COPY pypdf ./pypdf
COPY resources ./resources

# Build wheel
RUN python -m pip install --upgrade pip setuptools wheel
RUN python -m pip wheel . -w dist

FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install the built wheel from the builder stage
COPY --from=builder /build/dist/*.whl /tmp/
RUN python -m pip install --no-cache-dir /tmp/*.whl

# Verification script to confirm runtime
COPY verify.py ./verify.py

CMD ["python", "./verify.py"]

FROM python:3.12-slim as builder

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /build

# Copy minimal sources needed to build wheel
COPY pyproject.toml ./pyproject.toml
COPY README.md ./README.md
COPY pypdf ./pypdf
RUN mkdir -p dist

# Build wheel
RUN python -m pip install --upgrade pip setuptools wheel
RUN python -m pip wheel . -w dist

FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install built wheel
COPY --from=builder /build/dist/*.whl /tmp/
RUN python -m pip install --no-cache-dir /tmp/*.whl

# Basic runtime check: just print version from installed package on startup
CMD ["python", "-c", "import pypdf, sys; print(pypdf.__version__ if hasattr(pypdf, '__version__') else 'no-version'); print( sys.version.split()[0] )"]

Error summary

- Exact error message and exit code
  - ERROR: Failed to build 'file:///build' when getting requirements to build wheel
  - process "/bin/sh -c python -m pip wheel . -w dist" did not complete successfully: exit code: 1
  - flit_core.config.ConfigError: No files found for [project.license-files]: 'LICENSE' pattern

- Failing command/step
  - RUN python -m pip wheel . -w dist (builder 8/8)

- Missing packages or files mentioned
  - Missing license file(s) referenced by the build: No files found for [project.license-files]: 'LICENSE' pattern
  - LICENSE file (or files matching the pattern) not found in the project root

- Version mismatch information
  - Base image used: python:3.12-slim
  - No explicit version mismatch reported; the failure is due to missing LICENSE files required by flit_core when building the wheel.

FROM python:3.12-slim AS builder

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /build

# Copy project sources for wheel building
COPY pyproject.toml ./pyproject.toml
COPY README.md ./README.md
COPY LICENSE ./LICENSE
COPY pypdf ./pypdf
COPY resources ./resources

# Ensure license inside the package directory for flit
RUN mkdir -p pypdf && cp LICENSE pypdf/LICENSE

# Build wheel
RUN python -m pip install --upgrade pip setuptools wheel
RUN python -m pip wheel . -w dist

FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install the built wheel from builder stage
COPY --from=builder /build/dist/*.whl /tmp/
RUN python -m pip install --no-cache-dir /tmp/*.whl

# Verification script to confirm runtime
COPY verify.py ./verify.py

CMD ["python", "./verify.py"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist/*.whl /tmp/pypdf.whl
RUN python -m pip install --no-cache-dir /tmp/pypdf.whl && rm -f /tmp/pypdf.whl

# Smoke test to verify installation works
CMD ["python", "-c", "import pypdf, sys; print('pypdf', getattr(pypdf, '__version__', 'unknown'))"]

# Docker build context ignore rules
.git
.gitignore
__pycache__/
*.pyc
*.pyo
*.pyd
*.swp
*.swo
build/
dist/
*.egg-info/
.eggs/
*.egg
*.egg-info/
.cache/
.vscode/
.env
venv/
ENV/
env/
venvs/
.Python
*.tox
.tox/
*.pytest_cache/
.tests_cache/
docs/_build/
sample-files/.github/
node_modules/

# Optional - ignore test caches
tests/pdf_cache/

- Exact error message and exit code
  - ERROR: pypdf.whl is not a valid wheel filename.
  - Exit code: 1

- Failing command/step
  - [runtime 4/4] RUN python -m pip install --no-cache-dir /tmp/pypdf.whl && rm -f /tmp/pypdf.whl

- Missing packages or files mentioned
  - The builder stage produced a wheel with a proper filename (e.g., pypdf-6.9.2-py3-none-any.whl) in dist/.
  - The runtime copies it as /tmp/pypdf.whl via COPY --from=builder /workspace/dist/*.whl /tmp/pypdf.whl, resulting in a file named pypdf.whl.
  - The error occurs because pypdf.whl is not a valid wheel filename (Wheel filenames must follow the distribution-version-python-tag-abi-tag-platform-tag pattern).

- Version mismatch / naming detail
  - The wheel’s actual filename in the builder is pypdf-6.9.2-py3-none-any.whl, but the runtime then uses /tmp/pypdf.whl (an invalid wheel filename), triggering the pip validation error.
  - No explicit Python/pip version mismatch is reported as the root cause; the issue is the invalid wheel filename after copy.

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Smoke test to verify installation works
CMD ["python", "-c", "import pypdf, sys; print('pypdf', getattr(pypdf, '__version__', 'unknown'))"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Smoke test to verify installation works
CMD ["python", "-c", "import pypdf, sys; print('pypdf', getattr(pypdf, '__version__', 'unknown'))"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Smoke test to verify installation works
CMD ["python", "-c", "import pypdf, sys; print('pypdf', getattr(pypdf, '__version__', 'unknown'))"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Smoke test to verify installation works
CMD ["python", "-c", "import pypdf, sys; print(\"pypdf\", getattr(pypdf, \"__version__\", \"unknown\"))"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Smoke test script to verify installation works without shell-quoting issues
RUN bash -lc 'cat > /app/smoke.py << "PY"\nimport pypdf, sys\nprint("pypdf", getattr(pypdf, "__version__", "unknown"))\nPY'

# Run smoke test script on container start
CMD ["python", "smoke.py"]

- Failing step (exactly as in logs)
  [runtime 5/5] RUN bash -lc 'cat > /app/smoke.py << "PY"\nimport pypdf, sys\nprint("pypdf", getattr(pypdf, "__version__", "unknown"))\nPY'

- Exact error message and exit code
  0.182 bash: line 1: warning: here-document at line 1 delimited by end-of-file (wanted `PYnimport')
  0.182 bash: -c: line 1: syntax error near unexpected token `('
  0.182 bash: -c: `cat > /app/smoke.py << "PY"\nimport pypdf, sys\nprint("pypdf", getattr(pypdf, "__version__", "unknown"))\nPY'
  ------
  ERROR: failed to build: failed to solve: process "/bin/sh -c bash -lc 'cat > /app/smoke.py << \"PY\"\\nimport pypdf, sys\\nprint(\"pypdf\", getattr(pypdf, \"__version__\", \"unknown\"))\\nPY'" did not complete successfully: exit code: 2

- Failing command/step
  RUN bash -lc 'cat > /app/smoke.py << "PY"\nimport pypdf, sys\nprint("pypdf", getattr(pypdf, "__version__", "unknown"))\nPY'

- Missing packages or files mentioned
  No specific missing package/file is stated. The failure is due to an invalid here-document in the shell command used to create /app/smoke.py, causing a syntax error.

- Version mismatch info
  None reported. The wheel for pypdf was built earlier in the log (pypdf-6.9.2-py3-none-any.whl), but that success is not relevant to the failure here.

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Smoke test to verify installation works (exec form to avoid shell quoting issues)
CMD ["python", "-c", "import pypdf, sys; print('pypdf', getattr(pypdf, '__version__', 'unknown'))"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Smoke test script to verify installation works (exec form to avoid shell quoting issues)
RUN bash -lc 'printf "import pypdf\nprint(pypdf.__version__)\n" > /app/smoke.py'

# Run smoke test script on container start
CMD ["python", "smoke.py"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheels from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /workspace/dist /workspace/dist
RUN python -m pip install --no-cache-dir /workspace/dist/*.whl

# Prepare a simple smoke test script to verify installation without shell quoting issues
RUN printf 'import pypdf, sys\nprint("pypdf", getattr(pypdf, "__version__", "unknown"))\n' > /app/smoke.py

# Run smoke test script on container start
CMD ["python", "/app/smoke.py"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheel from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /build

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /build/dist /build/dist
RUN python -m pip install --no-cache-dir /build/dist/*.whl

# Smoke test to verify installation
CMD ["python", "-c", "import pypdf, sys; print('pypdf', getattr(pypdf, '__version__', 'unknown'))"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheel from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /build

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /build/dist /build/dist
RUN python -m pip install --no-cache-dir /build/dist/*.whl

# Prepare a simple smoke test script to verify installation without shell quoting issues
RUN printf 'import pypdf, sys\nprint("pypdf", getattr(pypdf, "__version__", "unknown"))\n' > /app/smoke.py

# Run smoke test script on container start
CMD ["python", "-c", "import pypdf, sys; print(\"pypdf\", getattr(pypdf, \"__version__\", \"unknown\"))"]

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheel from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /build

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /build/dist/pypdf-*.whl /tmp/pypdf-latest.whl
RUN python -m pip install --no-cache-dir /tmp/pypdf-latest.whl && rm -f /tmp/pypdf-latest.whl

# Smoke test to verify installation (exec form to avoid shell quoting issues)
CMD ["python", "-c", "import pypdf; print(pypdf.__version__)"]

Summary (under 1500 chars):

- Exact error message and exit code
  - ERROR: pypdf-latest.whl is not a valid wheel filename.
  - Exit code: 1 (the RUN step failed)

- Failing command/step
  - [runtime 4/4] RUN python -m pip install --no-cache-dir /tmp/pypdf-latest.whl && rm -f /tmp/pypdf-latest.whl

- Missing packages or files mentioned
  - The wheel file being installed is /tmp/pypdf-latest.whl, copied from builder: COPY --from=builder /build/dist/pypdf-*.whl /tmp/pypdf-latest.whl
  - Builder produced pypdf-6.9.2-py3-none-any.whl (located at /build/dist/). The runtime error suggests a filename/format issue with pypdf-latest.whl rather than a missing file.

- Version mismatch info
  - Base image: python:3.12-slim
  - Built wheel: pypdf-6.9.2-py3-none-any.whl
  - Pip notice: A new release of pip is available: 25.0.1 -> 26.0.1 (To update, run: pip install --upgrade pip)

- Quick potential fix
  - Ensure the copied wheel has a valid filename that matches wheel conventions (e.g., use pypdf-6.9.2-py3-none-any.whl as the destination name) or adjust the COPY to preserve the exact built filename.

# Build from source and install the pypdf package
FROM python:3.12-slim as builder

ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Install build tools required to build a wheel from source
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        python3-dev \
        libssl-dev \
        libffi-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /build

# Ensure latest build tooling is available
RUN python -m pip install --upgrade pip setuptools wheel build flit_core

# Copy the project files (best-effort; the wheel will be built from source)
COPY pyproject.toml README.md LICENSE ./
COPY pypdf ./pypdf
COPY . .

# Build a wheel distribution from source
RUN python -m build --wheel

# Final minimal runtime image
FROM python:3.12-slim as runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Copy the built wheel from the builder stage and install it
COPY --from=builder /build/dist/pypdf-6.9.2-py3-none-any.whl /tmp/pypdf-6.9.2-py3-none-any.whl
RUN python -m pip install --no-cache-dir /tmp/pypdf-6.9.2-py3-none-any.whl && rm -f /tmp/pypdf-6.9.2-py3-none-any.whl

# Smoke test to verify installation (exec form to avoid shell quoting issues)
CMD ["python", "-c", "import pypdf; print(pypdf.__version__)"]