jdx/mise v2026.6.10

v2026.6.10: Env defaults, Unix 7z, and stale-PATH fixes

on GitHub

A focused release that adds a default shorthand for env vars, brings .7z archive support to Unix, and cleans up several long-standing PATH and shim edge cases on Linux, macOS, Windows, and WSL.

Added

• env: New { default = "fallback" } shorthand for [env] (and config/task [vars]). The default applies only when the variable is unset or empty; existing non-empty values from the process env or earlier config are preserved. Mixing default with value, required, or age now fails with a clear message (#10441 by @jdx).

  [env]
  EDITOR = { default = "vim" }       # only used if $EDITOR is unset/empty
  PORT   = { default = "3000" }

• backend: .7z archives now extract on Unix as well as Windows, and strip_components probing works cross-platform. Migrated from the unmaintained sevenz-rust to sevenz-rust2, and tightened extraction to reject directory traversal and absolute paths (#10434 by @risu729).

Fixed

• env: When env_shell_expand is enabled, ${VAR:-default} now follows POSIX semantics: empty strings are treated as missing (fallback applies), ${VAR-default} only substitutes when the variable is unset, and fallback text is recursively expanded (e.g. ${NONEXISTENT:-$OTHER}). Braced parsing is also stricter — unterminated ${… stays literal and } inside $(…) no longer closes the brace (#10445 by @jdx, fixes #10444).
• env: mise x / run / env now strip mise-managed install directories from the inherited PATH when composing the child environment. Stale entries carried in from a frozen env snapshot (IDE terminals, CI wrappers, AI-agent harnesses) no longer sit ahead of the freshly injected bin dir, so subshells, #!/usr/bin/env shebangs, and package-manager workers all resolve the requested tool version (#10422 by @JamBalaya56562, addresses #10345).
• vfox: Plugin install hooks that shell out via Lua os.execute now run under the same sanitized mise_env as cmd.exec. Combined with new resolution of tools = true env values during install, this fixes setups like gcloud depending on python where a single mise install previously left CLOUDSDK_PYTHON pointing at a nonexistent path (#10432 by @JamBalaya56562, fixes #10282).
• shims: Windows extensionless bash shims now detect WSL (WSL_DISTRO_NAME / WSL_INTEROP / WSLInterop), drop their own dir from PATH, and exec the tool directly. This breaks the infinite mise x loop that happened when the Windows shims dir was exposed at /mnt/c/... inside WSL, and gives a clean <tool>: not found when no Linux tool is installed. file-mode shims are now also flagged version-stale so a normal reshim regenerates them on upgrade (#10421 by @JamBalaya56562, addresses #10299).
• file: make_symlink on Unix now creates the link at a unique temp name in the destination dir and atomically rename(2)s it into place. This eliminates the noisy failed to ln -sf … File exists (os error 17) warnings that surfaced when several mise processes (shell hook-env, direnv, editor integrations) raced on the same tracked-config link, e.g. when spawning a new git worktree (#10414 by @JamBalaya56562, fixes #10292).
• task: On Windows, script-task lookup now prefers Windows-native variants (e.g. .ps1) over their extensionless siblings, and extensionless takeover only applies when the match is unambiguous and stays within the same config family (#10443 by @jdx).

Changed

• deps: Replaced the unmaintained number_prefix (RUSTSEC-2025-0119) and stale humansize crates with bytesize. Size strings in generated tool-stub comments and mise cache prune output now use native bytesize IEC formatting — e.g. 821.69 KiB becomes 821.7 KiB and 2.15 MiB becomes 2.2 MiB (#10438 by @risu729).

Full Changelog: v2026.6.9...v2026.6.10

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