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fix(config): restore unconditional dotted conf.d fragments - #12242
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2026.8.9 started reading the component before `.toml` in `conf.d` filenames as an environment selector, so fragments like `x.base.toml` silently dropped out of the config stack with no warning and no migration path. Restore the previous behavior: every non-hidden TOML file in `.mise/conf.d` and `.config/mise/conf.d` loads unconditionally again. Dotted fragment names now emit a `deprecated_at!` warning pointing at hyphenated names, and the environment-suffix semantics become the default in 2027.8.10. Add an early-init `env_conf_d` setting (`MISE_ENV_CONF_D`) so the new semantics can be opted into immediately, or explicitly declined with `env_conf_d = false` to silence the warning during the migration window. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughThe change adds the Changesconf.d environment selection
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This restores unconditional loading of dotted configuration fragments while making environment-specific behavior opt-in; no actionable merge-blocking risk remains after normal checks and review. Sequence Diagram(s)sequenceDiagram
participant Environment
participant env_conf_d
participant ConfigDiscovery
participant ConfDLoader
Environment->>env_conf_d: Read MISE_ENV_CONF_D or miserc value
env_conf_d->>ConfigDiscovery: Resolve enabled or disabled mode
ConfigDiscovery->>ConfDLoader: Select conf.d fragments and environment patterns
ConfDLoader-->>ConfigDiscovery: Load fragments or emit dotted-name warning
Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Greptile SummaryThe PR restores unconditional loading for dotted
Confidence Score: 5/5The PR appears safe to merge because no blocking failure remains. No blocking failure remains. Important Files Changed
Reviews (2): Last reviewed commit: "fix(config): confine the dotted conf.d w..." | Re-trigger Greptile |
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Inline comments:
In `@docs/configuration.md`:
- Around line 13-16: Update both conf.d documentation bullets to state that all
non-hidden TOML files load in legacy mode only, when env_conf_d is unset or
false; clarify that env_conf_d = true excludes environment-specific dotted files
from unconditional loading. Add the existing deprecation link to the
.config/mise/conf.d bullet as well.
In `@docs/configuration/environments.md`:
- Around line 84-86: Update the opt-in documentation to refer to a supported
miserc.toml file rather than only .miserc.toml, and link that wording to the
documented early-init location list. Preserve the existing MISe_ENV_CONF_D
option and behavior description.
In `@src/config/mod.rs`:
- Around line 1844-1855: Update warn_on_dotted_conf_d_file so the
dotted_conf_d_filename warning is emitted only before the 2027.8.10 default
flip; preserve the existing checks and warning behavior during the migration
window, while suppressing it afterward when env_conf_d is unset.
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📒 Files selected for processing (12)
docs/configuration.mddocs/configuration/environments.mde2e/config/test_config_auto_enve2e/config/test_config_enve2e/config/test_global_config_precedencee2e/tasks/test_task_monorepo_mise_envschema/mise.jsonschema/miserc.jsonsettings.tomlsrc/config/miserc.rssrc/config/mod.rssrc/env.rs
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Instruction countsNothing was compared, and so nothing was gated. No series appears on both sides: either the base has no measurements recorded, or the two were measured on different runner classes, which are deliberately not comparable — counts shift between machine types by more than a real regression does. New, nothing to compare against: Only instruction counts gate. Wall clock is shown for context — on identical hardware it moves 4-20% run to run. Measured by tak — instruction-counted CLI benchmarks, stored in this repository's git notes.
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`parse_config_file` warned on any dotted `conf.d` fragment whenever `env_conf_d` was unset. After the 2027.8.10 default flip that would fire for files loading correctly because their environment is active, so gate the warning on the legacy default still being in effect. Also name the whole `miserc.toml` family rather than only the project-local `.miserc.toml`, since the setting is read from the merged early-init config, and document the mode dependence of the `conf.d` bullets in the config file list. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Fixes the regression reported in #12232.
What broke
#12151 taught
conf.dto read the filename component before.tomlas an environment selector. That silently changed the meaning of every existing dotted fragment: as of 2026.8.9,~/.config/mise/conf.d/x.base.tomlstopped loading unlessMISE_ENVcontainedbase. No warning, no migration window — tools just disappeared from the config stack.That was my mistake. The new syntax is fine; shipping it as an immediate reinterpretation of filenames people already had on disk was not.
What this does
Restores the old behavior as the default. Every non-hidden
.tomlfile in.mise/conf.dand.config/mise/conf.dloads unconditionally again, dots included.Deprecates dotted unconditional names via
deprecated_at!("2026.8.10", "2027.8.10", ...). The warning points at hyphenated names (node-tools.tomlrather thannode.tools.toml).Adds an early-init
env_conf_dsetting (MISE_ENV_CONF_D) so the new semantics are available immediately:env_conf_d = true— opt into environment-specificconf.dfilenames now.env_conf_d = false— keep the legacy behavior and silence the deprecation warning.It has to be set in
.miserc.tomlor the environment, since config discovery happens beforemise.tomlis read.The dotted-name ambiguity is worth resolving eventually — that's what the 12-month window is for — but not by breaking working setups in a patch release.
Testing
cargo test --bin mise(3077 passed)cargo clippy --workspace --all-features --all-targets -- -D warningscleanmise run lintcleanmise run test:e2e e2e/config/test_config_env e2e/config/test_config_auto_env e2e/config/test_global_config_precedence e2e/tasks/test_task_monorepo_mise_envtest_global_config_precedencenow covers the exact reported case: a dotted symlink (conf.d/x.base.toml) in the global config dir loads by default, and drops out underMISE_ENV_CONF_D=true.🤖 Generated with Claude Code
AI-assisted — Tool: Claude Code; model: anthropic/claude-opus-5; version: unavailable.
Note
Medium Risk
Changes which config files are discovered and merged, so a wrong default or setting would drop or reintroduce fragments. The change is gated and covered by e2e tests, but it still sits on the config-loading path.
Overview
Restores loading every non-hidden
conf.dTOML fragment by default, undoing the silent break where names likex.base.tomlwere treated as environment selectors.Environment-specific
conf.dsuffixes are now opt-in via early-initenv_conf_d/MISE_ENV_CONF_D(must be set inmiserc.tomlor the environment). Unset keeps the old behavior until 2027.8.10; dotted unconditional names warn during the window.env_conf_d = falsesilences the warning.Reviewed by Cursor Bugbot for commit 46a51cc. Bugbot is set up for automated code reviews on this repo. Configure here.
Summary by CodeRabbit
New Features
conf.dfilenames viaenv_conf_dorMISE_ENV_CONF_D.Bug Fixes
conf.dloading, environment matching, and symlink handling.Documentation