fix(activate): reset PATH when activate is called multiple times

[jdx]

Summary

When mise activate is called multiple times in a shell rc file, each call now resets __MISE_ORIG_PATH to the current PATH. This allows mise tools to move to the front of the "locked in" user path additions.

Problem

Previously, when activate was called multiple times:

1. First mise activate → __MISE_ORIG_PATH=A, PATH=mise_tools:A
2. User adds custom path B → PATH=B:mise_tools:A
3. Second mise activate → __MISE_ORIG_PATH still=A, PATH=B:mise_tools:A (mise tools stay in place)

Result: mise tools didn't move to the front of the original path when activate was called again.

Solution

Now, each activation unconditionally resets __MISE_ORIG_PATH to the current PATH:

1. First mise activate → __MISE_ORIG_PATH=A, PATH=mise_tools:A
2. User adds custom path B → PATH=B:mise_tools:A
3. Second mise activate → __MISE_ORIG_PATH=B:mise_tools:A, then hook-env runs → PATH=mise_tools:B:A

This "locks in" user additions at each activation point. The most recent custom additions stay at the front, but mise tools move to be immediately after them (and before older additions).

Example Behavior

# .bashrc
eval "$(mise activate bash)"  # A: __MISE_ORIG_PATH=original_path
export PATH="/custom1:$PATH"   # PATH=custom1:mise_tools:original_path
eval "$(mise activate bash)"  # B: __MISE_ORIG_PATH=custom1:mise_tools:original_path, then PATH=mise_tools:custom1:original_path
export PATH="/custom2:$PATH"   # PATH=custom2:mise_tools:custom1:original_path

Result: custom2:mise_tools:custom1:original_path - newest additions stay front, mise tools move to front of "locked in" path.

Changes

• All shells (bash, fish, zsh, pwsh) now unconditionally set __MISE_ORIG_PATH="$PATH" on each activation
• Added E2E test test_activate_multiple to verify the behavior
• Updated snapshots to reflect simpler activation code

🤖 Generated with Claude Code

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Note

Repeated activation keeps user-added PATH entries at the front without duplication; deactivation removes mise-managed env/paths while preserving user/pristine entries, with new e2e coverage.

• Shell activation/deactivation:
  • Activation now emits a deactivation script first and sets __MISE_ORIG_PATH only if unset across bash, zsh, fish, pwsh, nu, xonsh, elvish.
  • src/cli/deactivate.rs: use build_deactivation_script(...) and also unset __MISE_ORIG_PATH.
• PATH/env handling:
  • hook_env::build_path_operations: compute pre by excluding original and previous mise-managed paths; preserves genuine user additions; filters installs to avoid duplicates.
  • hook_env::clear_old_env + new compute_deactivated_path: rebuild PATH on deactivate to drop mise paths while retaining user/pristine entries (special-case fish PATH ops).
• Tests & snapshots:
  • Add e2e/cli/test_activate_multiple and e2e/cli/test_deactivate.
  • Update activation snapshots for shells to reflect conditional __MISE_ORIG_PATH and deactivation prelude.

^{Written by Cursor Bugbot for commit 54df803. This will update automatically on new commits. Configure here.}

[Copilot]

Pull Request Overview

This PR implements PATH reset functionality for multiple mise activations, preventing PATH corruption when mise activate is called multiple times in shell configuration files. The change ensures that subsequent activations reset PATH to the original state before applying mise modifications.

Key Changes:

• Adds conditional logic to check for existing __MISE_ORIG_PATH variable across all supported shells
• Resets PATH to original state on subsequent activations instead of stacking modifications
• Preserves original PATH value for future resets

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/shell/bash.rs	Adds PATH reset logic using bash conditional syntax
src/shell/fish.rs	Adds PATH reset logic using fish shell conditional syntax
src/shell/zsh.rs	Adds PATH reset logic using zsh conditional syntax
src/shell/pwsh.rs	Adds PATH reset logic using PowerShell conditional syntax
src/shell/snapshots/*.snap	Updates test snapshots to reflect new activation behavior
e2e/cli/test_activate_multiple	Adds end-to-end test for multiple activation scenario

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[Copilot]

Double curly braces in variable expansion will be interpreted literally by the shell. Should use single curly braces: ${__MISE_ORIG_PATH:-}

Suggested change

	if [ -z "${{__MISE_ORIG_PATH:-}}" ]; then
	if [ -z "${__MISE_ORIG_PATH:-}" ]; then

[Copilot]

Double curly braces in variable expansion will be interpreted literally by the shell. Should use single curly braces: ${__MISE_ORIG_PATH:-}

[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.10.21 x -- echo	19.4 ± 0.6	18.7	27.8	1.00
mise x -- echo	19.8 ± 0.5	18.9	26.0	1.02 ± 0.04

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.10.21 env	18.6 ± 0.4	17.9	22.8	1.00
mise env	19.0 ± 0.9	18.1	29.7	1.02 ± 0.05

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.10.21 hook-env	18.8 ± 0.3	18.0	20.3	1.00
mise hook-env	19.2 ± 0.4	18.3	20.4	1.02 ± 0.03

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.10.21 ls	16.5 ± 0.5	15.7	23.4	1.00
mise ls	17.1 ± 0.6	16.1	25.4	1.03 ± 0.05

xtasks/test/perf

Command	mise-2025.10.21	mise	Variance
install (cached)	110ms	111ms	+0%
ls (cached)	67ms	67ms	+0%
bin-paths (cached)	72ms	76ms	-5%
task-ls (cached)	436ms	487ms	-10%