concatenation - Concatenate strings, files and program output in Bash -

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the use case is, in case, css file concatenation, before gets minimized. concat 2 css files:

cat 1.css 2.css > out.css

to add text @ one single position, can do

cat 1.css <<somestuff 2.css > out.css end in middle. somestuff

to add stdout one other program:

sed 's/foo/bar/g' 3.css | cat 1.css - 2.css > out.css

so far good. regularly come in situations, need mix several strings, files , program output together, copyright headers, files preprocessed sed(1) , on. i'd concatenate them in little steps , temporary files possible, while having freedom of choosing order.

in short, i'm looking way in little steps possible in bash:

command [string|file|output]+ > concatenated # note plus ;-) --------^

(basically, having cat handle multiple stdins sufficient, guess, like

<(echo "foo") <(sed ...) <(echo "bar") cat 1.css -echo1- -sed- 2.css -echo2-

but fail see, how can access those.)

this works:

cat 1.css <(echo "foo") <(sed ...) 2.css <(echo "bar")

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