fix(backend): allow unresolved latest opt-in by jdx · Pull Request #9401 · jdx/mise

jdx · 2026-04-26T12:58:39Z

Summary

Fixes latest resolution for backends that can install an unresolved selector when their remote version list is empty.

minimum_release_age cannot be evaluated when a backend has no version candidates, but falling back to literal latest for every empty-list backend is unsafe: some backends require concrete versions and must continue failing rather than creating literal latest/ installs. This change keeps the fallback in the central resolver but makes it opt-in through Backend::unresolved_latest_version().

The resolver now only falls back when the backend’s unfiltered remote version list is empty and the backend explicitly provides an unresolved selector. If versions exist but are all filtered out by minimum_release_age, mise still reports no matching version, preserving the age gate.

pipx opts in only for git-backed requests, where latest is an installable selector. Its remote version listing remains honest: GitHub repos with no releases return [] from ls-remote instead of reporting latest as a release. Tests also assert GitHub release timestamps are preserved for date filtering.

Validation

cargo fmt --check
cargo test backend::pipx::tests
cargo build
mise run test:e2e e2e/backend/test_fuzzy_versions_do_not_install_literal_dirs
clean-cache config check: pipx:a13xp0p0v/kernel-hardening-checker@latest resolves to latest without minimum_release_age
clean-cache config check: pipx:a13xp0p0v/kernel-hardening-checker@latest with minimum_release_age = "7d" resolves to latest
clean-cache guard check: pipx:psf/black@latest with minimum_release_age = "1970-01-01" still reports no matching version instead of falling back to HEAD
clean-cache ls-remote pipx:a13xp0p0v/kernel-hardening-checker --json returns []
pre-commit hook during amend, including cargo check --all-features

This PR description was generated by an AI coding assistant.

Note

Medium Risk
Changes central @latest resolution behavior by allowing an unresolved selector fallback for opted-in backends when remote version listing is empty, which could affect install outcomes for latest requests. Scope is limited via explicit backend opt-in and only triggers in non-offline mode with no remote versions returned.

Overview
Fixes @latest resolution for backends that can install an unresolved selector when no remote versions are discoverable.

Adds a new Backend::unresolved_latest_version() opt-in hook and updates ToolVersion::resolve_version to fall back to that value only when the backend’s unfiltered remote version list is empty (and only when not offline), preserving failure behavior when versions exist but don’t match date/age filters.

Updates pipx to opt in for git-based requests by returning latest as an installable unresolved selector, while making its remote version listing for non-GitHub git sources return an empty list (instead of a synthetic latest version), and adds tests for GitHub release->version mapping and timestamp preservation.

^{Reviewed by Cursor Bugbot for commit 483868d. Bugbot is set up for automated code reviews on this repo. Configure here.}

gemini-code-assist

Code Review

This pull request improves Go module version resolution by implementing a fallback to fetch "@latest" metadata for modules without tagged versions and refactors the pipx backend to default to a "latest" version when no GitHub releases are found. It also updates the runtime symlink migration to version 2, which includes logic to skip temporary "latest" labels and refreshes the installation state after migration. I have no feedback to provide.

greptile-apps · 2026-04-26T13:04:36Z

Greptile Summary

This PR fixes @latest resolution for pipx backends that return an empty remote version list (e.g. git repos with no GitHub releases) by introducing a new opt-in Backend::unresolved_latest_version() hook and a fallback branch in the latest resolver. The age-gate (minimum_release_age) is correctly preserved: the fallback only fires when list_remote_versions (no date filter applied) returns an empty list, so repos that have releases but are all too recent still produce a no_versions_found error rather than falling through to "latest".

Confidence Score: 5/5

Safe to merge; the age-gate logic is correctly preserved and the new fallback is tightly scoped to the empty-list case.

No P0 or P1 issues found. The two prior-review concerns (GitHub URL opt-in scope, before_date regression) are handled correctly by the unfiltered list_remote_versions guard. Only a trivial blank-line style nit remains.

No files require special attention.

Important Files Changed

Filename	Overview
src/backend/mod.rs	Adds the `unresolved_latest_version()` opt-in hook to the `Backend` trait with a correct default of `None`; logic and safety gating are sound. Minor: missing blank line before the following method.
src/backend/pipx.rs	Extracts `versions_from_github_releases` helper, changes non-GitHub git remote listing to return `[]`, and provides `unresolved_latest_version()` for all `PipxRequest::Git` variants. New unit tests correctly assert ordering and `created_at` propagation. The age-gate concern from previous review is correctly handled by the resolver checking the unfiltered list before invoking the hook.
src/toolset/tool_version.rs	Adds the fallback branch that calls `list_remote_versions` (no date filter) and uses `unresolved_latest_version()` only when the unfiltered list is empty. Age-gate is correctly preserved: repos with releases (even all-recent ones) produce a non-empty unfiltered list so the fallback is never reached. The second `list_remote_versions` call is served from the in-memory cache.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["resolve_version: v == latest"] --> B{latest_installed_version?}
    B -->|Some| DONE1[return installed version]
    B -->|None| C{is_offline?}
    C -->|Yes| ERR[no_versions_found error]
    C -->|No| D["latest_version with before_date"]
    D -->|Some| DONE2[return resolved version]
    D -->|None| E["list_remote_versions — unfiltered by date"]
    E --> F{list is empty?}
    F -->|No| ERR
    F -->|Yes| G{unresolved_latest_version?}
    G -->|None| ERR
    G -->|Some v| DONE3[return unresolved selector]

_{Reviews (6): Last reviewed commit: "fix(backend): allow unresolved latest op..." | Re-trigger Greptile}

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github-actions · 2026-04-26T13:32:52Z

Hyperfine Performance

`mise x -- echo`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`mise-2026.4.22 x -- echo`	17.5 ± 0.4	16.6	19.3	1.00
`mise x -- echo`	17.6 ± 0.3	16.8	18.8	1.01 ± 0.03

`mise env`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`mise-2026.4.22 env`	17.5 ± 0.5	16.5	19.3	1.00
`mise env`	17.9 ± 0.5	16.9	21.0	1.02 ± 0.04

`mise hook-env`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`mise-2026.4.22 hook-env`	17.9 ± 0.6	16.8	24.5	1.00
`mise hook-env`	18.3 ± 0.4	17.0	21.0	1.02 ± 0.04

`mise ls`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`mise-2026.4.22 ls`	18.5 ± 0.5	17.4	20.2	1.00
`mise ls`	19.1 ± 0.6	17.9	27.8	1.03 ± 0.04

`xtasks/test/perf`

Command	mise-2026.4.22	mise	Variance
install (cached)	121ms	126ms	-3%
ls (cached)	67ms	68ms	-1%
bin-paths (cached)	67ms	67ms	+0%
task-ls (cached)	709ms	704ms	+0%

@jdx

### 🚀 Features - **(backend)** add global libc preference by @jdx in [#9404](#9404) - opt-in to pre-release versions for github and aqua backends by @jakedgy in [#9329](#9329) ### 🐛 Bug Fixes - **(backend)** allow unresolved latest opt-in by @jdx in [#9401](#9401) - **(install)** stop rewriting healthy runtime symlinks by @jdx in [#9410](#9410) - **(node)** route musl tarball URLs to unofficial-builds by @jdx in [#9409](#9409) - **(prune)** skip remote version resolution for tracked configs by @jdx in [#9406](#9406) - **(schema)** allow array values in tool additionalProperties by @JP-Ellis in [#9400](#9400) ### 📦️ Dependency Updates - bump communique to 1.1.2 by @jdx in [#9402](#9402) ### 📦 Registry - use aqua for rumdl by @scop in [#9397](#9397) ### Chore - **(ci)** improve pr-closer workflow by @jdx in [#9403](#9403) - **(release)** stop appending sponsor blurb when communique succeeds by @jdx in [#9395](#9395) ### New Contributors - @JP-Ellis made their first contribution in [#9400](#9400)

…ends (#9548) ## Summary Backends that opt into installing an unresolved `latest` selector (today only `pipx` for git-backed requests) legitimately return an empty remote version list when their source has no discoverable versions — e.g. a GitHub repo with no releases (only tags). The hard-error path was already addressed in #9401 by falling back to the unresolved selector. What's still left is noise: every command that touches such a tool emits 3–12 repeated `mise WARN No versions found for …` warnings. The repetition comes from #9444 (don't cache empty version lists) — every separate call site that asks for remote versions in the same process re-fetches and re-warns. Underlying GitHub API calls are still deduplicated by `RELEASE_CACHE`, so this is purely log noise, not extra HTTP traffic. This change suppresses the warning when the backend opts into `unresolved_latest_version()`. For those backends an empty list is the expected steady state, not an error worth flagging. Other backends still warn as before, so the warning continues to catch real problems (typo'd repos, configs pointing at the wrong place). Refs #9381. ## Reproduction \`\`\`toml # ~/.config/mise/conf.d/tools.toml [tools] "pipx:a13xp0p0v/kernel-hardening-checker" = "latest" \`\`\` `a13xp0p0v/kernel-hardening-checker` has 0 GitHub releases (14 tags). Before this PR: \`\`\` $ mise current mise WARN No versions found for pipx:a13xp0p0v/kernel-hardening-checker mise WARN No versions found for pipx:a13xp0p0v/kernel-hardening-checker mise WARN No versions found for pipx:a13xp0p0v/kernel-hardening-checker pipx:a13xp0p0v/kernel-hardening-checker latest \`\`\` After: \`\`\` $ mise current pipx:a13xp0p0v/kernel-hardening-checker latest \`\`\` `mise ls`, `mise outdated`, and `mise install` are similarly quiet now. ## Test plan - [x] Manual repro with the discussion's tool — all warnings gone for `mise ls`, `mise current`, `mise outdated`, `mise install` - [x] `mise run lint` - [x] `cargo build` 🤖 Generated with [Claude Code](https://claude.com/claude-code)  --- > [!NOTE] > **Low Risk** > Low risk: only changes warning emission logic when a backend opts into `unresolved_latest_version()`, with no effect on version fetching or installation behavior. > > **Overview** > Suppresses repeated `No versions found` warnings when `list_remote_versions_with_info` returns an empty list for backends that support installing an unresolved `latest` selector (via `unresolved_latest_version()`). Other backends still warn on empty remote version lists as before. > > <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit 9ca20e5. Bugbot is set up for automated code reviews on this repo. Configure [here](https://www.cursor.com/dashboard/bugbot).</sup>

jdx marked this pull request as ready for review April 26, 2026 12:59

jdx force-pushed the codex/fix-go-latest-stale-dirs branch from 0f02dd4 to 9c9c938 Compare April 26, 2026 13:02

gemini-code-assist Bot reviewed Apr 26, 2026

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jdx force-pushed the codex/fix-go-latest-stale-dirs branch from 9c9c938 to addf3e8 Compare April 26, 2026 13:13

jdx changed the title ~~fix(pipx): resolve github repos without releases~~ fix(backend): allow unresolved latest fallback Apr 26, 2026

greptile-apps Bot reviewed Apr 26, 2026

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Comment thread src/backend/pipx.rs

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Comment thread src/toolset/tool_version.rs

jdx force-pushed the codex/fix-go-latest-stale-dirs branch from addf3e8 to 0624feb Compare April 26, 2026 14:02

jdx changed the title ~~fix(backend): allow unresolved latest fallback~~ fix(backend): ignore age filter for empty version lists Apr 26, 2026

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Comment thread src/toolset/tool_version.rs Outdated

jdx force-pushed the codex/fix-go-latest-stale-dirs branch 2 times, most recently from b17aabf to 933eb4f Compare April 26, 2026 14:18

jdx changed the title ~~fix(backend): ignore age filter for empty version lists~~ fix(backend): allow unresolved latest opt-in Apr 26, 2026

fix(backend): allow unresolved latest opt-in

483868d

jdx force-pushed the codex/fix-go-latest-stale-dirs branch from 933eb4f to 483868d Compare April 26, 2026 14:32

jdx merged commit 580635a into main Apr 26, 2026
50 of 52 checks passed

jdx deleted the codex/fix-go-latest-stale-dirs branch April 26, 2026 15:07

mise-en-dev mentioned this pull request Apr 26, 2026

chore: release 2026.4.23 #9396

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mise-en-dev mentioned this pull request Apr 26, 2026

chore: release 2026.4.24 #9413

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BrewTestBot mentioned this pull request Apr 26, 2026

mise 2026.4.23 Homebrew/homebrew-core#279579

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jdx mentioned this pull request May 2, 2026

fix(backend): suppress no-versions warning for unresolved-latest backends #9548

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fix(backend): allow unresolved latest opt-in#9401
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Confidence Score: 5/5

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