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Fallback to top-level config.toml if not present in current directory, and remove fallback for env vars and CLI flags #94592

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Mar 11, 2022
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Fallback to top-level config.toml if not present in current directory, and remove fallback for env vars and CLI flags #94592

merged 1 commit into from
Mar 11, 2022

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@jyn514 jyn514 commented Mar 4, 2022 •
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This preserves the behavior where x.py will only give a hard error on a missing config file if it was configured through --config or RUST_BOOTSTRAP_CONFIG. It also removes the top-level fallback for everything except the default path; presumably if you're passing the path explicitly, you expect it to be exactly there and don't want to look in the root directory.

Fixes #94589.

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r? @Mark-Simulacrum

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 4, 2022
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bors commented Mar 5, 2022

☔ The latest upstream changes (presumably #94480) made this pull request unmergeable. Please resolve the merge conflicts.

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Speaking purely about desire end-state, loading order I think I would want:

  1. --config $path
  2. RUST_BOOTSTRAP_CONFIG $path [*]
  3. $CWD/config.toml, if exists
  4. $ROOT/config.toml, if exists
  • If either (1) or (2) is set, we should not continue on if the file doesn't exist to later entries (i.e., no fallback); that is an error.
    • Where $path, if absolute, is just loaded, and otherwise is $CWD/$path.

I believe this PR is adding (4) to the list above, correct? The remaining delta from the list would then be the adjustment to relative path treatment in --config and RUST_BOOTSTRAP_CONFIG, which I am suggesting should be always relative to the current working directory, not falling back to the root (as is the case today, per #94589, if I follow correctly).

Please feel free to tell me why I shouldn't want this. I did briefly look at what other tooling does -- it seems like for example Git will not try to look in $CWD at all for configuration (per man git-config). It does seem pretty useful to look in CWD by default, though, and I think probably makes sense for our purposes.

@Mark-Simulacrum Mark-Simulacrum added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 8, 2022
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jyn514 commented Mar 10, 2022

If either (1) or (2) is set, we should not continue on if the file doesn't exist to later entries (i.e., no fallback); that is an error.

That makes sense to me, yeah. I added the fallback behavior for --config at the same time as config.toml in #71994 and didn't think super hard about whether that was a good idea. The fallback for RUST_BOOTSTRAP_CONFIG has been present since it was added in #73317; I don't think it was intentional to have a fallback there. Removing the fallback for the default happened in #73590 which likewise seems unintentional.

I'll change this to remove the fallback for everything except the default path.

@jyn514 jyn514 force-pushed the consistent-config-loading branch from fdaa1d6 to 9f7d321 Compare March 10, 2022 04:30
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Fallback to top-level config.toml if not present in current directory
4d56f09 
This also preserves the behavior where x.py will only give a hard error on a missing config file
if it was configured through `--config` or RUST_BOOTSTRAP_CONFIG.
It also removes the top-level fallback for everything except the default path.
@jyn514 jyn514 force-pushed the consistent-config-loading branch from 9f7d321 to 4d56f09 Compare March 10, 2022 04:35
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jyn514 commented Mar 10, 2022

@rustbot ready

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Mar 10, 2022
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r=me with PR description updated

@Mark-Simulacrum Mark-Simulacrum added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 10, 2022
@jyn514 jyn514 changed the title Fallback to top-level config.toml if not present in current directory Fallback to top-level config.toml if not present in current directory, and remove fallback for env vars and CLI flags Mar 10, 2022
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jyn514 commented Mar 10, 2022

@rustbot ready

(I no longer have bors permissions.)

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Mar 10, 2022
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@bors r+ rollup

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bors commented Mar 11, 2022

📌 Commit 4d56f09 has been approved by Mark-Simulacrum

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 11, 2022
@Dylan-DPC Dylan-DPC mentioned this pull request Mar 11, 2022
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bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 11, 2022
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Auto merge of rust-lang#94845 - Dylan-DPC:rollup-3phylaq, r=Dylan-DPC
af8604f 
Rollup of 5 pull requests

Successful merges:

 - rust-lang#93283 (Fix for localized windows editions in testcase fn read_link() Issue#93211)
 - rust-lang#94592 (Fallback to top-level config.toml if not present in current directory, and remove fallback for env vars and CLI flags)
 - rust-lang#94776 (Optimize ascii::escape_default)
 - rust-lang#94840 (update `replace_bound_vars_with_placeholders` doc comment)
 - rust-lang#94842 (Remove unnecessary try_opt for operations that cannot fail)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit b711d17 into rust-lang:master Mar 11, 2022
@rustbot rustbot added this to the 1.61.0 milestone Mar 11, 2022
@jyn514 jyn514 deleted the consistent-config-loading branch November 5, 2022 19:49
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Fallback to top-level config.toml if not present in current directory
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