hledger/shell-completion/output-options.sh
2021-02-28 08:33:18 +01:00

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#!/bin/bash
# Output short and long options from man/usage text
set -o errexit -o pipefail -o nounset
main() {
declare tmpdir="_options.tmp"
declare tmp="${tmpdir}/${1:-generic}"
mkdir -p "$tmpdir"
cat > "$tmp"
# Do not propose single letter completions. It's not useful, it's noisy
# and it makes completion slower:
# Display all 200 possibilities? (y or n)
# sed -rn 's/.* (-[a-zA-Z0-9]).*/\1/gp' < "$tmp"
# Options requiring an argument make that explicit by appending
# the equal sign (=)
sed -rn '/^\s+-/p' "$tmp" |
sed -rn 's/^\s{1,4}(-.)?\s{1,4}(--[a-zA-Z][-_a-zA-Z0-9]+=?).*/\2/p'
}
main "$@"