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63 lines
1.5 KiB
Bash
63 lines
1.5 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2020-12-17 18:54:23 +0000 (Thu, 17 Dec 2020)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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# This is designed to mimick the standard GCP CloudShell behaviour
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# of re-customizing a new CloudShell
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if ! [ "${AWS_EXECUTION_ENV:-}" = "CloudShell" ]; then
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return
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fi
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customize_script=~/.aws_customize_environment
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lockdir=/tmp/aws_customize_environment.lock
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completion_semaphore="/.aws_customize_environment_completed"
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if ! [ -f "$customize_script" ]; then
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return
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fi
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if [ -f "$completion_semaphore" ]; then
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return
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fi
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# XXX: if the lockdir is more than 2 hours old and the completion semaphore wasn't found, remove the lockdir to try again
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if [ -d "$lockdir" ] && ! [ -f "$completion_semaphore" ]; then
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lockdir_epoch="$(stat -c %Y "$lockdir")"
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current_epoch="$(date +%s)"
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if [ $((current_epoch - lockdir_epoch)) -gt 7200 ]; then
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rmdir "$lockdir"
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fi
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fi
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# used as a mutex lock
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mkdir "$lockdir" 2>/dev/null || return
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sudo bash <<EOF
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{
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date
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echo
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bash "$customize_script" &&
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rmdir "$lockdir" &&
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sudo UMASK=0044 touch "$completion_semaphore" &
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} > /var/log/customize_environment 2>&1
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EOF
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