Bash: split multi line input into array

arraybashsplit

I've got a file with strings and base64 encoded data over multiple lines, that are sepearated by a comma.

Example: 

1,meV9ivU4PqEKNpo5Q2u2U0h9owUn4Y8CF83TTjUNWTRQs7dEgVxnsMgf4lvg9kvxcIaM3yB4Ssim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=,U2FsdGVkX1/c8rTTO41zVT7gB+KL+n7KoNCgM3vfchOyuvBngdXDGjXTvXTK0jz6

Now, I'd like to split the content into an array, so that each multi-line string is an array element.

I tried to use IFS, but that only reads the first line:

filecontent=$(cat myfile)
IFS=',' read -a myarray <<< "$filecontent"

Result:

$myarray[0] = 1 
$myarray[1] = meV9ivU4PqEKNpo5Q2u2U0h9owUn4Y8CF83TTjUNWTRQs7dEgVxnsMgf4lvg9kvxcIaM3yB4Ssim

Expected:

$myarray[0] = 1
$myarray[1] = meV9ivU4PqEKNpo5Q2u2U0h9owUn4Y8CF83TTjUNWTRQs7dEgVxnsMgf4lvg9kvxcIaM3yB4Ssim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=
$myarray[2] = U2FsdGVkX1/c8rTTO41zVT7gB+KL+n7KoNCgM3vfchOyuvBngdXDGjXTvXTK0jz6

Could someone help me out here?

Best Answer

Your attempt is close to the actual solution. The relevant flag can be found in the read help:

$ help read
...
      -d delim  continue until the first character of DELIM is read, rather
            than newline

It doesn't explicitly mention it, but you can set the delimiter to empty, and thus it'll read until EOF.

$ IFS=, read -d '' -a myarray < myfile

$ echo ${myarray[2]}
U2FsdGVkX1/c8rTTO41zVT7gB+KL+n7KoNCgM3vfchOyuvBngdXDGjXTvXTK0jz6
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