rust-cli/config-rs

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⚙️ Layered configuration system for Rust applications (with strong support for 12-factor applications).

Stars: 3.2k
Forks: 265
Open beginner issues: 0
Indexed issues: 110
Avg merge: 2h 42m
Merged PRs (30d): 4

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 8, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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110 open issues indexed

No option to trim whitespace from env values Open

A-env C-enhancement S-triage

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#768 · Opened Aug 11, 2026
Indeterministic errors when deserializing adjacently tagged enums storing integers based on string values Open

A-env C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#720 · 8 comments · Opened Nov 26, 2025
[ feature request ] Support RCL and KCL Open

A-format C-enhancement S-blocked

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-cli/config-rs#719 · 2 comments · Opened Nov 26, 2025
Generate user-facing documentation for a config structure Open

C-enhancement S-waiting-on-design

Difficulty 5/5 Over a week Newbie friendliness 30/100

rust-cli/config-rs#711 · 2 comments · 1 reaction · Opened Oct 31, 2025
Deserializing into a `config::Value` loses `origin` Open

C-enhancement S-waiting-on-design

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-cli/config-rs#698 · 1 comment · Opened Sep 26, 2025
Optional dependencies are exposed as features Open

A-format C-bug M-breaking-change

Difficulty 5/5 Over a week Newbie friendliness 20/100

rust-cli/config-rs#676 · 1 reaction · Opened Aug 12, 2025
Can it support eon？ Open

A-format C-enhancement S-waiting-on-decision

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-cli/config-rs#675 · 8 comments · Opened Aug 7, 2025
Can ENV not be forced to lowercase? Or Case could add a support for converting to AA_BB instead of AA BB Open

A-env

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-cli/config-rs#672 · Opened Jul 22, 2025
Support for reading .env files Open

A-source C-enhancement E-help-wanted

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#668 · 10 comments · 2 reactions · Opened Jun 28, 2025
How to write a configuration file for `.env` with the above structure `NotiferConfig`? Open

Difficulty 3/5 1-2 days Newbie friendliness 28/100

rust-cli/config-rs#658 · 3 comments · Opened Apr 22, 2025
Migration from `yaml-rust2` to `saphyr`? Open

A-format

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-cli/config-rs#654 · 4 comments · 3 reactions · Opened Apr 5, 2025
"with_list_parse_key" environment parser does not support vector field Open

A-env C-enhancement S-waiting-on-design

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#648 · 4 comments · Opened Mar 7, 2025
Overriding enum values doesn't work Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#636 · Opened Jan 14, 2025
Env support deserialize for map Open

A-env S-waiting-on-design

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#631 · Opened Jan 6, 2025
How to merge sources with existing default values? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-cli/config-rs#628 · 4 comments · 6 reactions · Opened Dec 27, 2024
No option to exclude keys from case conversion Open

A-env C-enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#625 · 1 comment · Opened Dec 23, 2024
Re-evaluate default features Open

A-format C-enhancement M-breaking-change

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-cli/config-rs#621 · 2 comments · 4 reactions · Opened Dec 19, 2024
If I add multiple sources, but one of them fails. Does the whole parse fail? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

rust-cli/config-rs#604 · 1 comment · Opened Nov 7, 2024
Documentation on hierarchical env is ambiguous and could better illustrate conventions/edge cases Open

A-source C-enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#596 · 5 comments · 5 reactions · Opened Oct 30, 2024
Integrate examples into documentation Open

C-enhancement E-help-wanted

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#593 · 1 comment · 1 reaction · Opened Oct 23, 2024
Docs don't make it obvious how the pieces connect together Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#591 · 2 comments · 1 reaction · Opened Oct 23, 2024
`ValueKind` is a `Value`, not a `Kind` Open

C-bug M-breaking-change

Difficulty 3/5 1-2 days Newbie friendliness 25/100

rust-cli/config-rs#590 · 4 comments · 1 reaction · Opened Oct 23, 2024
`Map` alias exposes the underlying type, potentially breaking people on feature addition Open

C-bug M-breaking-change

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-cli/config-rs#589 · Opened Oct 23, 2024
Dependency Dashboard Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

rust-cli/config-rs#587 · Opened Oct 23, 2024
support "_" within numbers Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

rust-cli/config-rs#578 · 1 comment · 2 reactions · Opened Sep 25, 2024
Use a HashMap for a config entry without changing the case Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

rust-cli/config-rs#577 · Opened Sep 24, 2024
Parse encrypted fields / custom transformers Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

rust-cli/config-rs#576 · Opened Sep 3, 2024
feat: Add support for HJSON Open

A-format

Difficulty 3/5 1-2 days Newbie friendliness 28/100

rust-cli/config-rs#573 · 1 comment · Opened Jul 23, 2024
reading values via environment variables in bash Open

A-env

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#569 · 4 comments · 1 reaction · Opened Jun 25, 2024
Incorrectly deserializes upper case unquoted `INF` string value from a YAML file Open

A-format

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-cli/config-rs#568 · Opened Jun 4, 2024
Preserving casing while building configuration Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#564 · 1 comment · Opened May 22, 2024
Incorrect description of separator usage in Environment::with_prefix() Open

A-env

Difficulty 1/5 Under an hour Newbie friendliness 52/100

rust-cli/config-rs#539 · Opened Feb 26, 2024
using Environment source to get List of struct Open

A-env C-enhancement S-waiting-on-design

Difficulty 5/5 Over a week Newbie friendliness 30/100

rust-cli/config-rs#536 · 6 comments · 12 reactions · Opened Feb 23, 2024
ux: Lack of key and origin in ConfigError::Message leads to uncertain sources from serde error messages Open

C-enhancement M-breaking-change

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#532 · 1 comment · 2 reactions · Opened Feb 8, 2024
Implement serde::Serialize for Config Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

rust-cli/config-rs#508 · 3 comments · Opened Dec 19, 2023
Enum variant aliases don't work Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

rust-cli/config-rs#502 · 3 comments · 3 reactions · Opened Nov 30, 2023
Non-deterministic selection of deserializer Open

A-env

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#501 · Opened Nov 24, 2023
kdl support Open

A-format

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-cli/config-rs#498 · 4 comments · 1 reaction · Opened Nov 17, 2023
Cannot deserialize with Struct without fields Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#461 · 8 comments · Opened Sep 27, 2023
Can't parse an empty array with the env parser Open

A-env

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#443 · 6 reactions · Opened Jul 19, 2023
Non-deterministic results for overlapping overrides Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#442 · 6 comments · Opened Jul 4, 2023
YAML: incorrect parsing of curly brackets Open

A-format

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-cli/config-rs#439 · 2 comments · Opened Jun 7, 2023
Vector fields are overwritten instead of merged Open

C-enhancement S-waiting-on-design

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#435 · 4 comments · 1 reaction · Opened Apr 14, 2023
Ron: Support for non-String map keys Open

A-format

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-cli/config-rs#432 · 2 comments · Opened Apr 12, 2023
Option to overwrite rather than merge HashMaps Open

C-enhancement E-help-wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#431 · Opened Apr 1, 2023
The keys that insert by with_list_parse_key() function should to_lowercase Open

A-env

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#428 · 1 comment · Opened Mar 25, 2023
async watch Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

rust-cli/config-rs#412 · Opened Jan 12, 2023
Enh Req: Introduce Config metadata for troubleshoot of override/layered values Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

rust-cli/config-rs#407 · 3 comments · Opened Dec 16, 2022
Give field in struct another valid name when parsing Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-cli/config-rs#405 · 5 comments · Opened Dec 15, 2022
Cannot read env variables when field names have `_` in them Open

A-env

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-cli/config-rs#391 · 18 comments · 7 reactions · Opened Nov 7, 2022

rust-cli/config-rs

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