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installer: improve zsh binary path search in setup_shell

This changes the behavior to default to the binary found first in $PATH,
then checking it's actually in the shells file (/etc/shells).

If that fails go back to the previous behavior, but actually check that
the path obtained exists in the filesystem.

Co-authored-by: Joel Kuzmarski <leoj3n@gmail.com>
This commit is contained in:
Marc Cornellà 2019-05-24 17:05:20 +02:00
parent 9d2b3ce79f
commit a6a093ba2a

View file

@ -117,7 +117,18 @@ setup_shell() {
return
fi
if ! chsh -s $(grep '^/.*/zsh$' "$shells_file" | tail -1); then
# Get the path to the right zsh binary
# 1. Use the most preceding one based on $PATH, then check that it's in the shells file
# 2. If that fails, get a zsh path from the shells file, then check it actually exists
if ! zsh=$(which zsh) || ! grep -qx "$zsh" "$shells_file"; then
if ! zsh=$(grep '^/.*/zsh$' "$shells_file" | tail -1) || [ ! -f "$zsh" ]; then
error "no available zsh binary found. Change your default shell manually."
return
fi
fi
# Actually change the default shell to zsh
if ! chsh -s "$zsh"; then
error "chsh command unsuccessful. Change your default shell manually."
fi
}