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setting COLUMNS env var to a number greater than 0 will make the terminal resize to that number of columns.
COLUMNS=80 uvx --from rich-cli rich myscript.py
Note
Not all programs respct the COLUMNS env var, but rich does, and a lot of
stuff I'm building uses rich.
I discovered this when I was trying to make a low effort readme generated from the code, but did not depend on the size of terminal it was ran on.
# justfile readme: echo "# Workspaces" > README.md echo "" >> README.md echo '``` bash' >> README.md COLUMNS=80 ./workspaces.py --help >> README.md echo '```' >> README.md