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March 10, 2020 21:32
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Grep your Lambda functions for a string: https://twitter.com/esh/status/1237436147409666048
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| #!/usr/bin/env bash | |
| #MIT No Attribution | |
| # | |
| #Copyright 2020 James Seward | |
| # | |
| #Permission is hereby granted, free of charge, to any person obtaining a copy of this | |
| #software and associated documentation files (the "Software"), to deal in the Software | |
| #without restriction, including without limitation the rights to use, copy, modify, | |
| #merge, publish, distribute, sublicense, and/or sell copies of the Software, and to | |
| #permit persons to whom the Software is furnished to do so. | |
| # | |
| #THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
| #INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A | |
| #PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
| #HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | |
| #OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE | |
| #SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| # Grep your Lambda functions for a string. If ripgrep is installed, uses that. | |
| set -e | |
| needle=${1?Missing needle param} | |
| if rg --help >/dev/null 2>&1; then | |
| grep_command=rg | |
| else | |
| grep_command="grep -r" | |
| fi | |
| function_names=$( aws lambda list-functions --output text --query 'Functions[].FunctionName' ) | |
| for f in $function_names; do | |
| url=$( aws lambda get-function --function-name "$f" --output text --query 'Code.Location' ) | |
| filename="$f.zip" | |
| [[ -f $filename ]] && rm -f "$filename" | |
| curl -s -o "$filename" "$url" | |
| [[ -d $f ]] && rm -rf "$f" | |
| mkdir "$f" | |
| unzip -qq "$filename" -d "$f/" | |
| $grep_command "$needle" "$f/" || true | |
| done |
Good call. I did consider also testing for the existence of the file before bothering to download it :)
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Maybe avoid overwriting pre-existing zip files and subdirectories by using a temp directory?
tmpdir=$(mktemp -d /tmp/lambda-grep-XXXXXX)
cd $tmpdir
...
rm -r $tmpdir