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fix(task): install lazy tools invoked from tasks and mise x - #12687
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📝 WalkthroughWalkthroughLazy tools now create bootstrap shims when needed, add those shims to child environments, and install missing providers during task and direct command execution. Task-only tool requests also reach shim resolution. Tests and documentation cover these flows. ChangesLazy tool bootstrap flow
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The change expands lazy-tool installation into task and exec environments, but a direct install can still leave other missing lazy tools without bootstrap shims, causing later commands to fail. Incremental shim updates may also leave incomplete or stale command entries during interruption or equivalent-path concurrency, so these bounded correctness risks should be fixed or explicitly accepted before merge. Sequence Diagram(s)sequenceDiagram
participant User
participant mise_run
participant TaskEnvironment
participant Toolset
participant ShimFarm
participant LazyTool
User->>mise_run: invoke task or command
mise_run->>TaskEnvironment: serialize task tool requests
TaskEnvironment-->>Toolset: provide lazy tool context
Toolset->>ShimFarm: create missing bootstrap shims
Toolset->>LazyTool: install provider on first use
LazyTool-->>User: execute requested command
Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 44.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 25 functions across 10 files. (1 skipped: 1 unsupported.) Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
Greptile SummaryThis PR enables lazy tools to install when invoked through tasks and
Confidence Score: 5/5The PR appears safe to merge. No blocking failure remains. Important Files Changed
Reviews (8): Last reviewed commit: "fix(shim): isolate lazy fallback failure..." | Re-trigger Greptile |
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Inline comments:
In `@src/shims.rs`:
- Line 348: Serialize shim construction per cache key around the missing-shim
check, publication, and stale-directory replacement so concurrent processes
cannot both build and remove the same directory. Update the flow containing
file::remove_all to recheck or coordinate ownership before deleting an existing
directory, preserving a directory already published by another process.
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docs/dev-tools/shims.mde2e/cli/test_lazy_tools_tasksrc/cli/exec.rssrc/file.rssrc/shims.rssrc/toolset/mod.rssrc/toolset/toolset_env.rssrc/toolset/toolset_install.rs
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Inline comments:
In `@src/task/task_executor.rs`:
- Around line 2212-2219: Update the task-tool environment handling around
task_tool_args_env so that when it is None, the child task explicitly removes
TASK_TOOL_ARGS_ENV from env via the existing env_remove path, preventing
inherited parent tool arguments. Add a regression test for a nested task with no
task tools to verify the variable is cleared and the child does not inherit the
parent Toolset.
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e2e/cli/test_lazy_tools_tasksrc/cli/exec.rssrc/shims.rssrc/task/task_executor.rssrc/task/task_tool_installer.rs
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Inline comments:
In `@src/cli/exec.rs`:
- Line 236: Update the lazy-provider handling around ensure_lazy_shims so shim
creation runs independently after direct lazy installation, rather than being
skipped by the else-if branch; ensure all remaining missing providers receive
shims, and add an end-to-end test covering two missing lazy providers.
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e2e/cli/test_lazy_tools_tasksrc/cli/exec.rssrc/cli/run.rssrc/shims.rssrc/task/task_executor.rssrc/task/task_tool_installer.rs
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- src/task/task_executor.rs
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A `lazy = true` tool installs when one of its bootstrap shims runs. A task runs through `sh -c`, which has no command-not-found handler, and `mise run` builds PATH from the pristine PATH, so a hand-edited lazy declaration (no farm shim yet) or a shell without the farm on PATH left the task failing with "command not found" while the same command worked interactively. When the toolset has a lazy declaration, the environment mise builds for children (`mise run`, `mise x`, `mise env`) now keeps the shim farms behind the tool paths, mirroring the fallback boundary hook-env already retains in the interactive shell, and `mise run`/`mise x` create any missing lazy bootstrap shims first. `mise x -- <cmd>` installs the lazy provider of the named command directly. Fixes discussion #12678 Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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jdx#12687 made the env mise builds for tasks and mise x install lazy tools on first use, and its docs promise the same for mise env: the printed environment puts the shim farms on PATH and missing bootstrap shims are created first. the code kept the PATH half but not the shim half, so an eval'd `mise env` shell, which has no command-not-found handler (discussion jdx#12678), failed with 'command not found' on a lazy tool declared by hand even though the printed PATH advertised it the env command now materializes missing bootstrap shims the same way exec.rs and run.rs already do: guarded by has_lazy_declarations so toolsets without lazy declarations see no difference, and warn-only on failure like the exec path verified: pre-change, eval "$(mise env -s bash)" then `dummy --version` failed with command not found while `mise x --dummy --version` worked; post-change the lazy tool installs and runs on first use and the shim appears. new e2e/cli/test_lazy_tools_env fails without the change and passes with it, the existing lazy e2e suite is unchanged, cargo fmt --check and clippy -D warnings are clean *AI-assisted — Tool: dsh; model: z-ai/glm-5.3-flash; version: unavailable.* Signed-off-by: Abdel <hktitof@gmail.com>
jdx#12687 made the env mise builds for tasks and mise x install lazy tools on first use, and its docs promise the same for mise env: the printed environment puts the shim farms on PATH and missing bootstrap shims are created first. the code kept the PATH half but not the shim half, so an eval'd `mise env` shell, which has no command-not-found handler (discussion jdx#12678), failed with 'command not found' on a lazy tool declared by hand even though the printed PATH advertised it the env command now materializes missing bootstrap shims the same way exec.rs and run.rs already do: guarded by has_lazy_declarations so toolsets without lazy declarations see no difference, and warn-only on failure like the exec path verified: pre-change, eval "$(mise env -s bash)" then `dummy --version` failed with command not found while `mise x --dummy --version` worked; post-change the lazy tool installs and runs on first use and the shim appears. new e2e/cli/test_lazy_tools_env fails without the change and passes with it, the existing lazy e2e suite is unchanged, cargo fmt --check and clippy -D warnings are clean *AI-assisted — Tool: dsh; model: z-ai/glm-5.3-flash; version: unavailable.* Signed-off-by: Abdel <hktitof@gmail.com>
jdx#12687 made the env mise builds for tasks and mise x install lazy tools on first use, and its docs promise the same for mise env: the printed environment puts the shim farms on PATH and missing bootstrap shims are created first. the code kept the PATH half but not the shim half, so an eval'd `mise env` shell, which has no command-not-found handler (discussion jdx#12678), failed with 'command not found' on a lazy tool declared by hand even though the printed PATH advertised it the env command now materializes missing bootstrap shims the same way exec.rs and run.rs already do: guarded by has_lazy_declarations so toolsets without lazy declarations see no difference, and warn-only on failure like the exec path verified: pre-change, eval "$(mise env -s bash)" then `dummy --version` failed with command not found while `mise x --dummy --version` worked; post-change the lazy tool installs and runs on first use and the shim appears. new e2e/cli/test_lazy_tools_env fails without the change and passes with it, the existing lazy e2e suite is unchanged, cargo fmt --check and clippy -D warnings are clean *AI-assisted — Tool: dsh; model: z-ai/glm-5.3-flash; version: unavailable.* Signed-off-by: Abdel <hktitof@gmail.com>
Summary
Fixes #12678: a tool declared
lazy = trueinstalled when its command was typed into the shell, but not when a mise task ran the same command.A lazy tool installs when one of its bootstrap shims runs. A task runs through
sh -c, and two things kept the shim from running there:lazy = trueentry added by hand has no shim untilmise reshim. The interactive shell hides this becausemise activate's command-not-found handler installs the tool anyway; the task shell has no handler.mise runbuilds the task PATH from the pristine, pre-activation PATH, so the shim farm is often absent even when the shim exists (CI, non-activated shells).Both reproduce with the discussion's config:
helm versionin an activated shell installs helm,mise run lintin the same shell fails withhelm: not found.Fix
mise run,mise x, andmise envplaces the user and system shim farms behind the tool paths when they are not already on PATH. This mirrors the fallback boundary hook-env already retains in the interactive shell for lazy users (feat(tools): add lazy tool shims #12594), so tasks behave like the shell. Installed tools still resolve to their real bin dirs first, a farm already on PATH keeps its position (so a sharedshims_dirsuch as~/.local/binfrom fix(shim): support shared executable directories #12675 is never reordered), and toolsets without a lazy declaration are unchanged.mise runandmise xreconcile the farm when a missing lazy tool lacks its bootstrap shim (a hand-edited declaration). In the common case this is a few file existence checks; a failure is a warning, not an abort.mise x -- <cmd>installs the lazy provider for the named command directly, since exec deliberately resolves programs past shim directories.Toolset::has_lazy_declarationsandshims::shim_farm_dirshelpers; its behavior is unchanged.Tradeoff, discussed with @jdx: in a project with a lazy tool, task commands not provided by a configured tool now go through the farm before the system PATH, the same as they already do for shim users and for lazy users in an activated shell.
Validation
mise run lint,cargo clippy --workspace --all-features --all-targets -- -D warningscargo test --bin mise -- shims file::tests path_env toolset_env hook_envmise run test:e2e e2e/cli/test_lazy_tools_task e2e/cli/test_lazy_tools e2e/cli/test_lazy_tools_system e2e/shell/test_shims_activation_conditional e2e/tools/test_path_order e2e/cli/test_activate_aggressive e2e/cli/test_exec e2e/cli/test_run e2e/env/test_env_cache e2e/env/test_env_path e2e/config/test_env_path_orderinghelm = { version = "latest", lazy = true }config and no reshim: firstmise run lintinstalls helm and runs it; later runs execute the real binary directly.Windows is untested here; the code reuses the platform shim helpers.
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Note
Medium Risk
Changes PATH construction and install timing for
mise run/mise x/mise envwhenever lazy tools are configured; behavior is broad but aligned with activated-shell semantics and covered by new e2e tests.Overview
Fixes lazy tools (
lazy = true) not installing whenmise runormise xruns their commands, even though an activated shell could install them via shims or command-not-found handling.PATH for child environments (
mise run,mise x,mise env): when the toolset has any lazy declaration, shim farms are inserted after real tool install dirs (same fallback idea as hook-env), including when farms were missing from the pristine PATH. Farms already on PATH keep their position; toolsets without lazy tools are unchanged.Bootstrap shims without
mise reshim:ensure_lazy_shimswrites missing lazy bootstrap shims from the already-computed missing-version list (hand-editedlazy = trueentries).mise run, task install paths, andmise xcall this before executing; shim creation failures warn instead of aborting.mise x -- <cmd>installs the lazy provider for the invoked command directly (exec resolves past shim dirs), then refreshes the missing-tools list.Task-only lazy tools:
__MISE_TASK_TOOL_ARGScarries serialized tasktoolsinto shim dispatch; nested tasks clear it so parent lazy tools are not inherited.Docs and e2e coverage (
test_lazy_tools_task, system PATH ordering) validate PATH layout, first-run install, andmise xbehavior.Reviewed by Cursor Bugbot for commit 2045a28. Bugbot is set up for automated code reviews on this repo. Configure here.
Summary by CodeRabbit
New Features
Documentation
mise run,mise x, andmise env.