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July 27, 2017 12:08
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This fish-shell script detects and switches the Swift version. It has been tested with fish-shell version 2.2.0 under Ubuntu Linux 16.04 LTS.
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| #!/usr/bin/fish | |
| set SWIFT_PATH /opt | |
| set swift_versions (sudo find $SWIFT_PATH -maxdepth 1 -name "swift[0-9][0-9][0-9]" -type d -printf "%f\n" | sort) | |
| set swift_active_version (stat $SWIFT_PATH/swift -c "%N" | sed -r "s/.+(swift[0-9][0-9][0-9]).+/\1/g") | |
| echo -e "\n\e[44;1mI found these Swift versions:\e[0m" | |
| set i 1 | |
| for v in $swift_versions | |
| echo -en " $i) $v" | |
| if [ $v = $swift_active_version ] | |
| echo -n " (currently active)" | |
| end | |
| echo | |
| set i (math $i + 1) | |
| end | |
| read -p "echo -e '\nSwitch to Swift version: '" selected_version | |
| if [ "$selected_version" = "" ] | |
| echo -e "\e[32mNo changes are made. Bye.\e[0m\n" | |
| exit | |
| else | |
| set selected_version (math $selected_version) | |
| if [ $selected_version -lt 1 -o $selected_version -ge $i ] | |
| echo -e "\e[31mInvalid selection. Bye.\e[0m\n" | |
| exit | |
| end | |
| echo -en "\e[42mSwitching to version \e[1m$swift_versions[$selected_version]\e[22m... " | |
| sudo rm -f $SWIFT_PATH/swift | |
| sudo ln -s $SWIFT_PATH/$swift_versions[$selected_version] $SWIFT_PATH/swift | |
| echo -e "Done.\e[0m\n" | |
| end |
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