Actually Using Ed (2012)

Ed is the standard text editor - https://www.gnu.org/fun/jokes/ed-msg.en.html

> Let's look at a typical novice's session with the mighty ed:

    golem$ ed

    ?
    help
    ?
    ?
    ?
    quit
    ?
    exit
    ?
    bye
    ?
    hello?
    ?
    eat flaming death
    ?
    ^C
    ?
    ^C
    ?
    ^D
    ?

There are actually practical uses for ed in shell scripting. For example recently I had to recover my entire website from the internet archive because covid reasons it's a long story.

So I went to the internet archive, downloaded almost all of it (all of the stuff that was there), put it through lynx, to text and from there created markdown.

So at some point I had 100-ish files and I wanted to put some yaml at the top of every markdown file. While playing around with how I wanted to do this at some point I needed to make some changes. I was faced with needing to do certain simple edits in the yaml front-matter of every one of a very large number of files.

Now you could just make a vim/emacs macro and run it on every file and that would be fine, or you could use ed in a shellscript. Something like this:

    find . -type f -name "*.md" | while read f ; do
        ed "${f}" <<__DONE
        1,^--g/^foo/d
        wq
    __DONE

    done

(2012)