Heroku部署GDAL应用报错：无法定位Aptfile包问题排查求助

It sounds like a frustrating roadblock—especially since your deployments worked fine just days ago, even with that warning, and now even rolling back to a previously working commit isn't helping. Let's break down what's happening and walk through fixes to get your app deployed again:

What's Triggering This Error? #

Previously, the heroku-community/apt buildpack would log that "Unable to locate package Aptfile" warning but still proceed to read the actual contents of your Aptfile (in your case, gdal-bin). It seems an update to the apt buildpack or Heroku's build environment changed this behavior—now it’s treating that warning as a fatal error and halting the build entirely.

Step-by-Step Solutions #

1. Double-Check Your Aptfile Configuration

First, eliminate the simplest causes:

• Ensure the file is named exactly Aptfile (capital "A", no file extension like .txt).
• Confirm it’s placed in your project’s root directory (not nested inside a subfolder).
• Verify the file contains only one line: gdal-bin (no extra spaces, comments, or blank lines).
• Double-check that this file is actually pushed to your GitHub repo (navigate to your repo’s root on GitHub to confirm it’s visible).

2. Reorder Your Buildpacks

Heroku executes buildpacks in the order they’re listed, and conflicts between the geo buildpack and apt buildpack might be triggering this error. Try setting the apt buildpack first to prioritize its configuration:

# Clear existing buildpacks
heroku buildpacks:clear

# Add apt buildpack first, then the geo buildpack
heroku buildpacks:add heroku-community/apt
heroku buildpacks:add https://github.com/heroku/heroku-geo-buildpack.git

Then re-push your code to trigger a fresh build.

3. Purge Heroku's Build Cache

Corrupted build cache can cause unexpected behavior, especially when buildpacks receive updates. Clear the cache and try deploying again:

heroku builds:cache:purge
git push heroku main

4. Upgrade Your Heroku Stack

You’re using the Heroku-18 stack, which reached end-of-life in May 2023. Its apt repositories are no longer maintained, which could lead to package lookup issues. Switch to a supported stack like Heroku-20 or Heroku-22:

# Switch to Heroku-20 (or heroku-22 if you prefer a newer stack)
heroku stack:set heroku-20
git push heroku main

The heroku-geo-buildpack supports newer stacks, so this should work seamlessly with your GDAL setup.

Why This Worked Before #

Older versions of the apt buildpack would ignore the "Aptfile not found as a package" warning because it recognized Aptfile as your configuration file, not a package to install. A recent update likely tightened error handling, turning that warning into a showstopper.

内容的提问来源于stack exchange，提问作者Flo