37 lines
938 B
Bash
Executable File
37 lines
938 B
Bash
Executable File
#!/bin/bash
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echo 'Substituting environment variables...'
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# The first parameter is a comma-delimited list of paths to files which should be substituted
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if [[ -z $1 ]]; then
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echo 'ERROR: No target files given.'
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exit 1
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fi
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# The second parameter is a comma-delimited list of environment variable names
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if [[ -z $2 ]]; then
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echo 'ERROR: No environment variables given.'
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exit 1
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fi
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# Convert "VAR1,VAR2,VAR3,..." to "\$VAR1 \$VAR2 \$VAR3 ..."
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env_list="\\\$${2//,/ \\\$}" # "\" and "$" are escaped as "\\" and "\$"
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for file_path in ${1//,/ }
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do
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echo "replacing $env_list in $file_path"
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# Replace strings in the given file(s) in env_list
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envsubst "$env_list" < "$file_path" > "$file_path".tmp && mv "$file_path".tmp "$file_path"
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echo '...'
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done
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echo 'Finished substituting environment variables.'
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for env_var in ${2//,/ }
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do
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echo "$env_var = ${!env_var}"
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done
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# Execute all other commands with parameters
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exec "${@:3}"
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