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Buildpack compile fixes and refactoring #177
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Example build on this branch using Heroku-18: And with the not-yet-supported Heroku-20 we now get a nicer build time error and not a boot failure at runtime: |
Since with exit on error, if that line is ever reached, the exit code will always be zero anyway.
In order to prevent the build completing apparently successfully, but the app fail to boot at runtime due to stack incompatibility. At first glance this would seem unnecessary due to the stack-specific URL meaning the `curl` would 404 on supported stacks. However #165 means the Cedar-14 binary is installed on all stacks, and on Heroku-20 causes the failures at runtime seen in #166. Future PRs will fix the curl/binary handling to use stack-specific URLs, however it's still nicer to explicitly handle unsupported stacks with a clear error message than a 404.
The caching of the nginx archive isn't used in production (nothing ever writes to the cached file) or in CI. Whilst it may speed up some local development workflows slightly, on a fast connection downloading from S3 takes less than a second, so isn't worth the added `bin/compile` complexity / confusion as to behaviour in production.
- The `s3-external-1` endpoint is a legacy reference to `us-east-1`: https://stackoverflow.com/a/26622229 - The path based bucket specification is deprecated: https://aws.amazon.com/blogs/aws/amazon-s3-path-deprecation-plan-the-rest-of-the-story/
Previously the nginx version command was failing since the `nginx-$STACK` binary does not exist, resulting in output like: ``` remote: -----> Installed directory to /app/bin ``` This failure went unnoticed since `pipefail` mode is not enabled. The nginx binary path has been fixed, and the command now uses `-v` instead of `-V` since the former only output one line, avoiding the need to `head -n1`. In addition, the `cut` usage shows more of the original line in the case of no match. Fixes #174.
Enables the following bash modes: - `u`: error on undefined variables - `pipefail`: error if an earlier command in a pipe sequence exits non-zero, rather than only if the final command is non-zero See: http://redsymbol.net/articles/unofficial-bash-strict-mode/
To improve the reliability of the build. See: https://curl.haxx.se/docs/manpage.html#--retry https://curl.haxx.se/docs/manpage.html#--connect-timeout
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dzuelke
approved these changes
Nov 9, 2020
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In order to reduce the size of the Heroku-20 support PR, I've split out some of the compile fixes/cleanup.
The most notable of these are:
See the individual commit messages (and changelog entries) for more details.
Refs W-8367040.