Support reading .env files from FIFOs (e.g. 1Password Environments)#776
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hramezani merged 1 commit intopydantic:mainfrom Mar 8, 2026
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Pull request overview
This PR updates the dotenv settings source to treat named pipes (FIFOs)—such as those used by 1Password Environments—as readable .env inputs, instead of skipping them.
Changes:
- Allow
.envpaths that are FIFOs to be read byDotEnvSettingsSource(in addition to regular files). - Add a Unix-only test that verifies
.envcontent can be read from a FIFO.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
pydantic_settings/sources/providers/dotenv.py |
Extends env file detection to include FIFO paths so mounted named pipes are read. |
tests/test_settings.py |
Adds a regression test that writes dotenv content through a FIFO and asserts it’s parsed. |
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Thasnk @JacobHayes for the PR. Would be great if you can udpate the dotenv source documentation in https://github.com/pydantic/pydantic-settings/blob/main/docs/index.md#dotenv-env-support |
1Password Environments mounts .env files as named pipes (FIFOs). These were previously skipped because the is_file() check returns False for FIFOs. Add an is_fifo() check so they are read normally. Signed-off-by: Jacob Hayes <jacob.hayes@datadoghq.com>
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hramezani
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Thanks @JacobHayes |
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1Password Environments mounts
.envfiles as named pipes (FIFOs). These were previously skipped because theis_file()check returnsFalsefor FIFOs. This adds anis_fifo()check so they are read normally.https://developer.1password.com/docs/environments
Closes #771