Org stuffs: 001: Moving/removing done todo items

About this series: A collection of short blog posts related to manipulating Org documents using Perl. This is the first article. See the whole series.

A bit of history. I started using org-mode in 2011. Emacs I had been using much earlier, but as also happened with many others, org-mode really clinched the deal. Slowly but sure, I migrated my notes, and later on, my todo list, into this format. Also in that year I started the Org::Parser project. It’s not perfect, and at one point educated_foo said it was pointless because just like only perl can parse Perl, only emacs’ org-mode can truly parse Org. However, I manage to do some useful tricks with the module. (BTW, I missed the guy.)

Being a heavily procrastinating and utterly lazy person, with lots of ideas and abandoned projects, my todo file grew to thousands of items (last count, 4600+ undone todo items and 1900+ done dones).

I currently organize my todo.org like the following: there are hierarchical categories which I write strictly as level-1 headings, with subcategories written inline in the heading using “cat > subcat > subsubcat” notation. I keep these level-1 headings sorted. Example:

* 00unorganized [0/0]
* finance [0/0]
* health [0/0]
* leisure > vacation [0/0]
* pet [0/0]
* person > kid 1 > education [0/0]
* person > kid 1 > health [0/0]
* person > kid 2 > health [0/0]
* person > kid 2 > health [0/0]
* person > kids > education [0/0]
* person > kids > health [0/0]
* person > mom > health [0/0]
* proj > blog > blog title 1 [0/0]
* proj > blog > blog title 2 [0/0]
* proj > book > working title 1 [0/0]
* proj > book > working title 2 [0/0]
* proj > perl [0/0]
* proj > perl > ansitable [0/0]
* proj > perl > debian [0/0]
* proj > perl > lcpan [0/0]
* proj > perl > perinci [0/0]
* proj > perl > wordlist [0/0]
* reading > books to read [0/0]
* watching > movies to watch [0/0]
* watching > tv series to watch [0/0]

Actual todo items are always written as level-2 headings under one of these level-1 categories. This way, I always know that todo items are at level-2, which makes some things easier to find and manipulate. For example:

* proj > perl > lcpan [0/0]
** IDEA [2020-10-04 Sun] lcpan: subcommand to star/favorite modules/dists/authors
** IDEA [2020-10-04 Sun] lcpan: subcommand to show whether our favorite modules/dists/authors have a release in the past week/month/etc
** WISHLIST [2020-10-04 Sun] lcpan: subcommand to retrieve number of ++ from metacpan
** IDEA [2020-02-24 Mon] lcpan: subcommand to check circular dependency
** TODO [2020-05-10 Sun] lcpan: replace Archive::Tar with Archive::Tar::Wrapper

If you’re wondering about the timestamps, my habit is to put a creation date at the beginning of each headline’s title. I myself feel it’s rather unclean and have tried to put “logs” inside the entries, but it’s nice being able to quickly see how old a todo item is, so I’ve kept the habit alive.

The actual “proj > perl” category itself is quite large (currently 3000+), as I put todo items for various smaller projects there and only create a subcategory for a few notable projects.

Over time, I collect hundreds of done todo items in various categories, including in this large “proj > perl” category. I want to remove the done items, but archive it in other file (done.org), under the same category headlines.

Emacs offers some archiving functions for this, and I’m sure with some elisp code it can be instructed to do the above, but with my very limited eslip-fu I shuddered at how much time I have to spend to produce such code. Thus, Org::Parser to the rescue. The result is move-done-todos. It’s not as concise as I like it to be, because the Org::Parser’s API still stinks and lacking when it comes to building node objects or doing some basic manipulation. But at least it works.

To use it:

% move-done-todos todo.org done.org

By default, the script operates in dry-run (simulation) mode, for safety. If you are sure with the results, you add the --no-dry-run option:

% move-done-todos todo.org done.org --no-dry-run

The nice thing about this script is that it can auto-create the categories in done.org, so moving is only a single command-line invocation process. I do strive to make everything in the world a single command-line invocation process.

If you want to remove the done todo items from your todo file, which you might prefer because the done todo items are already recorded in the revision history of your repository anyway, you can omit the done filename:

% move-done-todos todo.org --no-dry-run

There are things that I want the script to be able to do, but not yet, like updating the counter cookies. That, for now, is currently still noted as an undone item in my todo.org.

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