| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Usage:
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| 4 | # ./readlink-demo.sh <function name>
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| 5 |
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| 6 | set -o nounset
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| 7 | set -o pipefail
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| 8 | set -o errexit
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| 9 |
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| 10 | two-file-symlinks() {
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| 11 | # NOTE: Two levels of symlinks requires readlink -f, not readlink.
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| 12 | ln -s -f $PWD/demo/readlink-demo-target.sh /tmp/demo.sh
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| 13 | ln -s -f /tmp/demo.sh /tmp/demo-level2.sh
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| 14 |
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| 15 | # Call readlink-demo-target.sh through TWO file symlinks
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| 16 | /tmp/demo-level2.sh
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| 17 | }
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| 18 |
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| 19 | dir-symlink() {
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| 20 | ln -s -f --no-target-directory $PWD/demo/ /tmp/oil-demo
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| 21 |
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| 22 | # Calling readlink-demo-target.sh when a PATH component is a symlink to a
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| 23 | # directory
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| 24 | /tmp/oil-demo/readlink-demo-target.sh
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| 25 | }
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| 26 |
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| 27 | all() {
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| 28 | echo 'Two files:'
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| 29 | two-file-symlinks
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| 30 | echo
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| 31 |
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| 32 | echo 'Dirs:'
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| 33 | dir-symlink
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| 34 | echo
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| 35 | }
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| 36 |
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| 37 | "$@"
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