User Login Shell experimental

mise can declare the current user's login shell in [bootstrap.user] and apply it with mise bootstrap user apply or mise bootstrap:

[bootstrap.user]
login_shell = "/bin/zsh"

When the configured shell is not listed in /etc/shells, mise appends it first. When the configured shell differs from the user's account entry, mise runs:

chsh -s /bin/zsh

Semantics

[bootstrap.user].login_shell follows the same manual, idempotent model as bootstrap packages:

• Most local wins - a project config can override a global login_shell; unlike package/file lists, there is only one desired value.
• Manual application only - mise never changes your login shell implicitly. Only mise bootstrap applies it.
• Listed shell - the shell must appear in /etc/shells before chsh accepts it on many platforms. mise adds the configured path to that file when it is missing.
• Unix-only - on non-Unix platforms, or when chsh is not available, mise bootstrap user status reports the entry as skipped and bootstrap ignores it.
• Absolute path required - relative shell names are skipped with a warning. Use the full path, such as /bin/zsh or /opt/homebrew/bin/fish.

/etc/shells is usually root-owned. If the file is not writable, mise uses the same non-interactive sudo behavior as system packages: it can prompt in an interactive terminal, uses passwordless sudo in non-interactive contexts, and honors system_packages.sudo = false.

When mise itself is started under sudo, login shell status and chsh target SUDO_USER rather than root. Plain root sessions, such as containers, still target root.

Commands

mise bootstrap user status            # shows login shell state
mise bootstrap user status --missing  # exit 1 if the shell differs or is not listed

mise bootstrap user apply           # updates /etc/shells and runs chsh -s
mise bootstrap user apply --dry-run # print the commands instead
mise bootstrap user apply --yes     # skip the confirmation prompt