| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Common shell functions for task scripts.
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| 4 | #
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| 5 | # Usage:
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| 6 | # source devtools/run-task.sh
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| 7 | # ... # define task functions
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| 8 | # run-task "$@"
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| 9 |
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| 10 | # List all functions defined in this file (and not in sourced files).
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| 11 | _bash-print-funcs() {
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| 12 | local funcs=($(compgen -A function))
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| 13 | # extdebug makes `declare -F` print the file path, but, annoyingly, only
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| 14 | # if you pass the function names as arguments.
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| 15 | shopt -s extdebug
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| 16 | declare -F "${funcs[@]}" | grep --fixed-strings " $0" | awk '{print $1}'
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| 17 | shopt -u extdebug
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| 18 | }
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| 19 |
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| 20 | _show-help() {
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| 21 | # TODO:
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| 22 | # - Use awk to find comments at the top of the file?
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| 23 | # - Use OSH to extract docstrings
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| 24 |
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| 25 | echo "Usage: $0 TASK_NAME ARGS..."
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| 26 | echo
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| 27 | echo "To complete tasks, run:"
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| 28 | echo " source devtools/completion.bash"
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| 29 | echo
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| 30 | echo "Tasks:"
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| 31 |
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| 32 | if command -v column >/dev/null; then
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| 33 | _bash-print-funcs | column
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| 34 | else
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| 35 | _bash-print-funcs
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| 36 | fi
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| 37 | }
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| 38 |
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| 39 | run-task() {
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| 40 | if [[ $# -eq 0 || $1 =~ ^(--help|-h)$ ]]; then
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| 41 | _show-help
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| 42 | exit
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| 43 | fi
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| 44 |
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| 45 | if ! declare -f "$1" >/dev/null; then
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| 46 | echo "$0: '$1' isn't an action in this task file. Try '$0 --help'"
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| 47 | exit 1
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| 48 | fi
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| 49 |
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| 50 | "$@"
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| 51 | }
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