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README.md
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README.md
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@ -334,6 +334,8 @@ Hello, World
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## Parsing a `key=val` file.
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This could be used to parse a simple `key=value` configuration file.
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```shell
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# Setting 'IFS' tells 'read' where to split the string.
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while IFS='=' read -r key val; do
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@ -344,6 +346,18 @@ while IFS='=' read -r key val; do
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# '$key' stores the key.
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# '$val' stores the value.
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printf '%s: %s\n' "$key" "$val"
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# Alternatively replacing 'printf' with the following
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# populates variables called '$key' with the value of '$val'.
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#
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# NOTE: I would extend this with a check to ensure 'key' is
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# a valid variable name.
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# export "$key=$val"
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#
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# Example with error handling:
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#
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# export "$key=$val" 2>/dev/null ||
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# printf 'warning %s is not a valid variable name\n' "$key"
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done < "file"
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```
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