Running Bash in Zerethon IDE

• Run (Ctrl/⌘+Enter) runs the entry file — main.sh by default — with bash --noprofile --norc (Bash 5.2): no startup files, only your script. Make another file the entry with the ▶ button next to it in the explorer.
• Output and errors appear in the Output tab; what you type in the Input tab is the script's standard input.
• A run is stopped after 10 seconds. Memory and the number of processes are limited, there is no network (curl, wget and package installs fail), and the project files are read-only (write to /tmp).
• Scripts can use the image's BusyBox tools (grep, sed, awk, sort…) and Perl, inside the same sandbox.
• Run tests (Ctrl/⌘+Shift+Enter) runs every file named test_*.sh with Bash, each on its own. A test file passes when it exits with status 0.

source ./lib/strings.sh

[[ $(shout "hi") == "HI!" ]] || { echo "shout failed"; exit 1; }
[[ $(repeat x 3) == "xxx" ]] || { echo "repeat failed"; exit 1; }
echo "strings ok"

Tip: The editor highlights Bash and completes keywords and common commands. There is no formatter or live checking (such as ShellCheck) yet: Run shows Bash's own messages.