The shell might be POSIX, but sed uses a GNU extension -- namely, the double add... | Hacker News

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		teo_zero 9 days ago \| parent \| context \| favorite \| on: A static site generator written in POSIX shell The shell might be POSIX, but sed uses a GNU extension -- namely, the double address "a,b". EDIT: Sorry, I was wrong, the double address is indeed POSIX. I was thinking of the GNU syntax: a,+n

deng 9 days ago [–]

From the fine article:

Why shell?

Well, not really because it’s portable, as despite being a “POSIX script”, most of the date and sed tricks I do don’t work on the BSD versions of those commands, with comrak, additionally, being a dependency.

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