afb81b8278
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24 lines
672 B
Plaintext
24 lines
672 B
Plaintext
# Sed script that inserts the file called HEADER before the header entry.
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#
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# At each occurrence of a line starting with "msgid ", we execute the following
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# commands. At the first occurrence, insert the file. At the following
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# occurrences, do nothing. The distinction between the first and the following
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# occurrences is achieved by looking at the hold space.
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/^msgid /{
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x
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# Test if the hold space is empty.
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s/m/m/
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ta
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# Yes it was empty. First occurrence. Read the file.
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r HEADER
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# Output the file's contents by reading the next line. But don't lose the
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# current line while doing this.
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g
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N
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bb
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:a
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# The hold space was nonempty. Following occurrences. Do nothing.
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x
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:b
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}
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