# An Idea for Dealing With 'to Do' Notes

So I had this idea when I saw this question on the TeX Stack Exchange site. Indeed, this is more or less an elaboration of my answer to that question.

I’m sure that I’m not the only person whose draft documents are littered with comments like %TODO fix this paragraph or %TODO substantiate this claim. With a little discipline about how you format these ‘to-do’ comments, there are some neat things you can do with them.

If all your to-do notes actually start with %TODO then you can use a tool like grep to find them all. This is pretty obvious. So this is a good argument for getting into the habit of formatting your notes to yourself in some such easily greppable way. (Is “greppable” a word? Sure, why not.)

Here’s an initial specification for making your to-do notes greppable.

• Each note starts on a new line.
• Each note stays on one line only.
• Each note starts with %TODO or some other easily searchable phrase.

Next, we need to search for them.

This searches for the pattern %TODO in the file file.tex and prints the line, with its line number (that’s what the -n tag is for). This gives us a quick way to see what’s going on in our file. If we had a big multi file project – like, say, that PhD dissertation I’m supposed to be writing – then we could grep across all the .tex files in the dreaded thesis folder. This would give us a neat overview of where the problems were. I actually defined a command \worries which writes its argument in a marginpar so that the to-do note appears where it is relevant in the text. But these notes aren’t all on one line. I could overcome this problem somewhat with grep’s -A 5 tag which would print the line with, say \worries on it, and the next five lines. But this isn’t ideal, since it isn’t smart enough to only print the lines that relate to the note. Anyway, grepping “worries” still gives a pretty good overview of where the issues are.

If I’d had more discipline and kept my notes on one line each, this would have been more useful. Once we’ve got our list of %TODOs, we can write that to a file and then input the file at the end of our document. We’ll have to use \verbatiminput (from verbatim) or some other such command, because of the comment symbols in %TODO. Presumably with some regex/awk/grep magic on that file we could even make it amenable to having each to-do note render as an item in a LaTeX itemize environment. You could also then call a script which runs your grep command within your .tex file (with the appropriate write18 settings etc).

“Gosh, Seamus, you’re so clever (and handsome)” I hear you cry “but surely you know that the todonotes package already does most of this sort of stuff.” I reply: todonotes does some things, but not others. That package is quite good at indicating, in the output file, where the problems are. You can do a \listoftodos (I think it’s called) that lists all your to-do notes. That’s pretty neat. But it lists them by page in the output. What my method ends up with is a list of notes linked to where they crop up in the input file which is, after all, what you will be editing. This, I think, can be more useful. There may be packages which achieve what I do here, but I think there’s something pleasingly basic about this solution. While we’re on the subject of line numbers and input files, I hope to have a go at fixing up my draftinputlines package and submitting it to CTAN. What fun.

Note that with the current theme, inline code blocks that also happen to be links don’t show up as much different from inline code blocks that aren’t links. Some of the inline code here is clicky.