c90ad4cf2b
When user provides an invalid flag, print out error message and help menu instead of looping forever Longhorn #1419 Signed-off-by: Phan Le <phan.le@rancher.com>
50 lines
926 B
Bash
Executable File
50 lines
926 B
Bash
Executable File
#!/bin/bash
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list="longhorn-images.txt"
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POSITIONAL=()
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while [[ $# -gt 0 ]]; do
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key="$1"
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case $key in
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-i|--images)
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images="$2"
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shift # past argument
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shift # past value
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;;
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-l|--image-list)
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list="$2"
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shift # past argument
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shift # past value
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;;
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-h|--help)
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help="true"
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shift
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;;
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*)
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echo "Error! invalid flag: ${key}"
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help="true"
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break
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;;
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esac
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done
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usage () {
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echo "USAGE: $0 [--image-list longhorn-images.txt] [--images longhorn-images.tar.gz]"
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echo " [-l|--images-list path] text file with list of images. 1 per line."
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echo " [-i|--images path] tar.gz generated by docker save. If this flag is empty, the script does not export images to a tar.gz file"
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echo " [-h|--help] Usage message"
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}
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if [[ $help ]]; then
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usage
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exit 0
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fi
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set -e -x
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for i in $(cat ${list}); do
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docker pull ${i}
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done
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if [[ $images ]]; then
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docker save $(cat ${list} | tr '\n' ' ') | gzip -c > ${images}
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fi |