109 lines
3.8 KiB
Plaintext
109 lines
3.8 KiB
Plaintext
#compdef mssh
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# ------------------------------------------------------------------------------
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# Copyright (c) 2020 Hyeon Kim
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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# ------------------------------------------------------------------------------
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# Description
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# -----------
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# mssh is a Python client for accessing EC2 instances via AWS EC2 Instance
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# Connect.
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#
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# References:
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# https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-connect-methods.html#ec2-instance-connect-connecting-ec2-cli
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# https://github.com/aws/aws-ec2-instance-connect-cli
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# https://pypi.org/project/ec2instanceconnectcli/
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#
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# ------------------------------------------------------------------------------
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# Authors
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# -------
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#
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# * Hyeon Kim (https://hyeon.me/)
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#
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# ------------------------------------------------------------------------------
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# Do nothing if there's no AWS CLI
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if (( ! $+commands[aws] )); then
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return
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fi
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# Define function only when it doesn't exist
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(( $+functions[_mssh_cache_policy] )) || _mssh_cache_policy() {
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# Cache invalidates after 30 seconds
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#
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# Reference:
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# https://zsh.sourceforge.net/Doc/Release/Expansion.html#index-globbing_002c-qualifiers
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local -a oldp
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oldp=( "$1"(ms+30) )
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(( $#oldp ))
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}
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# Unless user explicitly turned off caching, enable caching just for this context
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local existing_setting
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zstyle -s ":completion:${curcontext}:" use-cache existing_setting
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if [[ -z "${existing_setting}" ]]; then
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zstyle ":completion:${curcontext}:" use-cache on
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fi
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# Update cache policy only when there was no existing policy
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local existing_policy
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zstyle -s ":completion:${curcontext}:" cache-policy existing_policy
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if [[ -z "${existing_policy}" ]]; then
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zstyle ":completion:${curcontext}:" cache-policy _mssh_cache_policy
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fi
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local -a instances
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if _cache_invalid mssh_instances || ! _retrieve_cache mssh_instances; then
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# Cache is invalid or caching retrieval failed (usually due to disabled cache)
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# Store the output of the AWS CLI separately
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#
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# Reference:
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# https://unix.stackexchange.com/a/430182
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local stderr
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local -i exit_code
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() {
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aws ec2 describe-instances \
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--query 'Reservations[].Instances[] | [?State.Name == `running`].join(`:`, [InstanceId, Tags[?Key == `Name`].Value | [0]])' \
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--output text \
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>${1} 2>${2}
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exit_code=${?}
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IFS=$'\n\t' instances=($(<${1}))
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stderr=$(<${2})
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} =(:) =(:)
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if (( $exit_code == 0 )); then
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# AWS CLI successfully executed
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_store_cache mssh_instances instances
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else
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# AWS CLI failed, abort autocompletion
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_message -r "\
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Failed autocomplete due to following reason:
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${stderr}"
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return
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fi
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fi
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_describe 'command' instances
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# Reference:
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# https://zsh.sourceforge.net/Doc/Release/Completion-System.html
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# https://github.com/zsh-users/zsh-completions/blob/master/zsh-completions-howto.org
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