BuildAgent

pallets-flask

SUCCESS

10m 23s

History Source

Summary Iterations2 Transcript20 Dockerfile

01Iteration 1

WRITEWriteFile· step #1

Dockerfile869 bytes written

▸text34 lines · 869 chars

FROM python:3.15.0a7-slim-trixie

# Prevent Python from writing pyc files to disk and ensure stdout/stderr are unbuffered
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

WORKDIR /app

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

# Copy source
COPY . /app

# Build the project using Flit
RUN python -m pip install --no-cache-dir flit_core>=3.11,<4
RUN python -m flit build

# Install the built distribution(s)
RUN python -m pip install --no-cache-dir dist/*.whl

# Clean up build artifacts
RUN rm -rf dist/*.whl dist/ || true

# Default command: show Flask version to confirm container works
CMD ["flask", "--version"]

WRITEWriteFile· step #2

.dockerignore310 bytes written

▸dockerignore40 lines · 310 chars

# Ignore VCS
.git
.vscode
.venv
venv/
env/
PYTHONPATH/

# Python caches
__pycache__/
*.pyc
*.pyo
*.pyd
*.swp
*.swo

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

# Local dev files
*.log
*.tmp
*.temp

# Docs/build
docs/_build/

# Tests and large assets
tests/
*.tar.gz
*.whl

# Misc
*.DS_Store
.idea/
.vim/

VERIFYVerifyBuild· step #3

27s

VerifyBuildrejected

Concerns: Base image tag 'python:3.15.0a7-slim-trixie' appears to be an alpha/pre-release and may not exist or be supported, which could cause the build to fail., The final CMD assumes Flask is installed as a dependency; if the built package does not depend on Flask, 'flask --version' may fail.

DOCKERDockerImageSearch· step #4

search docker hubpython:3.15-slim-trixie1 results

▸show lines1

Image python:3.15-slim-trixie NOT found on Docker Hub.

DOCKERDockerImageSearch· step #5

search docker hubpython:3.15-slim1 results

▸show lines1

Image python:3.15-slim NOT found on Docker Hub.

DOCKERDockerImageSearch· step #6

search docker hubpython:3.151 results

▸show lines1

Image python:3.15 NOT found on Docker Hub.

DOCKERDockerImageSearch· step #7

search docker hubpython:3.11-slim1 results

▸show lines1

Image python:3.11-slim exists on Docker Hub.

WRITEWriteFile· step #8

Dockerfile858 bytes written

▸text34 lines · 858 chars

FROM python:3.11-slim

# Prevent Python from writing pyc files to disk and ensure stdout/stderr are unbuffered
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

WORKDIR /app

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

# Copy source
COPY . /app

# Build the project using Flit
RUN python -m pip install --no-cache-dir flit_core>=3.11,<4
RUN python -m flit build

# Install the built distribution(s)
RUN python -m pip install --no-cache-dir dist/*.whl

# Clean up build artifacts
RUN rm -rf dist/*.whl dist/ || true

# Default command: show Flask version to confirm container works
CMD ["flask", "--version"]

VERIFYVerifyBuild· step #9

1m 46s

VerifyBuildbuild_failed

Concerns:
- The CMD uses 'flask --version' which may fail if Flask is not included as a dependency in the built wheel.

Build error details:
- #0 building with "default" instance using docker driver
- #1 [internal] load build definition from Dockerfile
- #1 DONE 0.0s
- #2 [internal] load metadata for docker.io/library/python:3.11-slim
- #2 ERROR: failed to copy: httpReadSeeker: failed open: failed to do request: Get "https://docker-images-prod.6aa30f8b08e16409b46e0173d6de2f56.r2.cloudflarestorage.com/registry-v2/docker/registry/v2/blobs/sha256/e6/e67db9b14d098500c534b3acb73f5503fad7eed29720b8870d12dadb98ae245b/data?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=f1baa2dd9b876aeb89efebbfc9e5d5f4%2F20260317%2Fauto%2Fs3%2Faws4_request&X-Amz-Date=20260317T073436Z&X-Amz-Expires=1200&X-Amz-SignedHeaders=host&X-Amz-Signature=729926b3b13e71d6f3412c74d606737178c5f2611a2e9761d8daafccd581e93a": dial tcp [2606:4700:2ff9::1]:443: connect: network is unreachable
  - Dockerfile:1
    - FROM python:3.11-slim
  - Dockerfile:3
    - "    # Prevent Python from writing pyc files to disk and ensure stdout/stderr are unbuffered"
- Build failure cause:
  - "python:3.11-slim: failed to resolve source metadata for docker.io/library/python:3.11-slim: failed to copy: httpReadSeeker: failed open: failed to do request: Get ..." (network unreachable during metadata fetch)

Dockerfile context:
- Line 1: >>> FROM python:3.11-slim
- Line 3:     # Prevent Python from writing pyc files to disk and ensure stdout/stderr are unbuffered

Files/packages:
- Docker image: docker.io/library/python:3.11-slim
- Command concern: Flask dependency may be missing in the built wheel

Notes:
- The failure is due to network/connectivity to the Docker registry/cloud storage (network is unreachable).

Next steps (options):
- Check host/network access to docker.io and the cloudflarestorage CDN.
- If behind a proxy or firewall, configure access/proxy settings for Docker.
- If Flask is required, ensure it is declared as a dependency in the build context or wheel.

02Iteration 2

WRITEWriteFile· step #1

Dockerfile638 bytes written

▸text31 lines · 638 chars

FROM python:3.15.0a7-slim-trixie

# Build-time dependencies
RUN apt-get update -y && \
    apt-get install -y --no-install-recommends build-essential libssl-dev libffi-dev ca-certificates && \
    rm -rf /var/lib/apt/lists/*

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install Flit build backend
RUN pip install --no-cache-dir flit_core>=3.11,<4

# Copy sources
COPY pyproject.toml .
COPY . .

# Build the project
RUN flit build

# Install the built package
RUN pip install --no-cache-dir dist/*.whl

# Expose port for potential Flask apps
EXPOSE 5000

# Default command to verify CLI
CMD ["flask","--version"]

VERIFYVerifyBuild· step #2

19s

VerifyBuildrejected

Concerns: FROM image tag uses Python 3.15.0a7 which appears to be an alpha/pre-release version and may not exist on Docker Hub or be stable., The CMD relies on Flask (flask --version); if the built wheel does not include Flask as a dependency or if the project is not a Flask app, this will fail., COPY . . could unintentionally copy large or sensitive files; consider adding a .dockerignore.

WRITEWriteFile· step #3

Dockerfile636 bytes written

▸text31 lines · 636 chars

FROM python:3.11-slim-bullseye

# Build-time dependencies
RUN apt-get update -y && \
    apt-get install -y --no-install-recommends build-essential libssl-dev libffi-dev ca-certificates && \
    rm -rf /var/lib/apt/lists/*

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install Flit build backend
RUN pip install --no-cache-dir flit_core>=3.11,<4

# Copy sources
COPY pyproject.toml .
COPY . .

# Build the project
RUN flit build

# Install the built package
RUN pip install --no-cache-dir dist/*.whl

# Expose port for potential Flask apps
EXPOSE 5000

# Default command to verify CLI
CMD ["flask","--version"]

VERIFYVerifyBuild· step #4

1m 06s

VerifyBuildbuild_failed

▸Build error

- Failing step (command):
  [4/8] RUN pip install --no-cache-dir flit_core>=3.11,<4
- Exact error message and exit code:
  /bin/sh: 1: cannot open 4: No such file
  Exit code: 2
- What went wrong:
  The shell treated "<4" as an input redirection (trying to open a file named "4"), causing the error “cannot open 4: No such file.”
  Root cause: unquoted version spec flit_core>=3.11,<4 is parsed by /bin/sh as a redirection.
- Missing packages/files mentioned:
  - The file named "4" that the shell attempted to open (not an actual package/file in the workspace).
- Version/mismatch notes:
  - Base image: python:3.11-slim-bullseye.
  - The apt-get install step later shows Debian bullseye (Debian 11) package handling with ca-certificates version string: 20230311+deb12u1~deb11u1, which indicates a cross-version packaging tag (deb12u1 for a deb11 target). This suggests a packaging version mismatch in the underlying Debian libs during the install step, though it did not by itself cause this error.
- Quick fix (optional): quote or escape the version spec in Dockerfile to avoid shell redirection, e.g. RUN pip install --no-cache-dir "flit_core>=3.11,<4".

WRITEWriteFile· step #5

Dockerfile638 bytes written

▸text31 lines · 638 chars

FROM python:3.11-slim-bullseye

# Build-time dependencies
RUN apt-get update -y && \
    apt-get install -y --no-install-recommends build-essential libssl-dev libffi-dev ca-certificates && \
    rm -rf /var/lib/apt/lists/*

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install Flit build backend
RUN pip install --no-cache-dir "flit_core>=3.11,<4"

# Copy sources
COPY pyproject.toml .
COPY . .

# Build the project
RUN flit build

# Install the built package
RUN pip install --no-cache-dir dist/*.whl

# Expose port for potential Flask apps
EXPOSE 5000

# Default command to verify CLI
CMD ["flask","--version"]

VERIFYVerifyBuild· step #6

1m 05s

VerifyBuildbuild_failed

▸Build error

Summary of Docker build error

- Failing step (command/step):
  - RUN flit build (step 7/8)

- Exact error message and exit code:
  - /bin/sh: 1: flit: not found
  - ERROR: failed to build: failed to solve: process "/bin/sh -c flit build" did not complete successfully: exit code: 127

- Missing packages or files mentioned:
  - The flit CLI is missing (the build expects the flit command).
  - The image installed flit_core (>=3.11,<4) and reported "Successfully installed flit_core-3.12.0", but that does not provide the flit CLI used by the build step.

- Version mismatch information:
  - The Dockerfile installs flit_core (>=3.11,<4) and fails because the flit CLI (needed for flit build) is not installed. This is a tooling mismatch: flit_core is present, but the required flit CLI is not.

WRITEWriteFile· step #7

Dockerfile662 bytes written

▸text31 lines · 662 chars

FROM python:3.11-slim-bullseye

# Build-time dependencies
RUN apt-get update -y && \
    apt-get install -y --no-install-recommends build-essential libssl-dev libffi-dev ca-certificates && \
    rm -rf /var/lib/apt/lists/*

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install Flit build backend and CLI
RUN pip install --no-cache-dir "flit_core>=3.11,<4" "flit>=3.11,<4"

# Copy sources
COPY pyproject.toml .
COPY . .

# Build the project
RUN flit build

# Install the built package
RUN pip install --no-cache-dir dist/*.whl

# Expose port for potential Flask apps
EXPOSE 5000

# Default command to verify CLI
CMD ["flask","--version"]

VERIFYVerifyBuild· step #8

57s

VerifyBuildsmoke_failed

Concerns: The CMD relies on Flask being installed as a dependency; if the project does not include Flask in pyproject.toml, the default command will fail.
Smoke [PASS]: flask --version
Smoke [FAIL]: python -c 'import flask; print(flask.__version__)
  Output: sh: 1: Syntax error: Unterminated quoted string

Smoke [PASS]: python -m pip list | grep -i flask

WRITEWriteFile· step #9

Dockerfile676 bytes written

▸text31 lines · 676 chars

FROM python:3.11-slim-bullseye

# Build-time dependencies
RUN apt-get update -y && \
    apt-get install -y --no-install-recommends build-essential libssl-dev libffi-dev ca-certificates && \
    rm -rf /var/lib/apt/lists/*

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install Flit build backend and CLI
RUN pip install --no-cache-dir "flit_core>=3.11,<4" "flit>=3.11,<4"

# Copy sources
COPY pyproject.toml .
COPY . .

# Build the project
RUN flit build

# Install the built package
RUN pip install --no-cache-dir dist/*.whl

# Expose port for potential Flask apps
EXPOSE 5000

# Default command to verify CLI
CMD ["python","-m","flask","--version"]

VERIFYVerifyBuild· step #10

32s

VerifyBuildsmoke_failed

Smoke [PASS]: python -m flask --version
Smoke [FAIL]: python -c 'import sys; print(sys.version.split()[0])
  Output: sh: 1: Syntax error: Unterminated quoted string

VERIFYVerifyBuild· step #11

40s

VerifyBuildaccepted

Concerns: CMD uses 'python -m flask --version' which requires Flask to be installed at runtime. Flask may not be a dependency of the built wheel, so this could fail if Flask isn't present in the final image., COPY . . copies the entire repository; this may include unnecessary or large files. Consider a more selective COPY to reduce image size.
Smoke [PASS]: python --version
Smoke [PASS]: flit --version