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-rw-r--r-- | doc/devblog/day_297__optparse-applicative.mdwn | 25 |
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diff --git a/doc/devblog/day_297__optparse-applicative.mdwn b/doc/devblog/day_297__optparse-applicative.mdwn new file mode 100644 index 000000000..0885f0db4 --- /dev/null +++ b/doc/devblog/day_297__optparse-applicative.mdwn @@ -0,0 +1,25 @@ +Now working on converting git-annex to use +[optparse-applicative](https://github.com/pcapriotti/optparse-applicative) +for its command line parsing. I've wanted to do this for a long time, +because the current code for options is generally horrible, runs in +IO, and is not at all type safe, while optparse-applicative has wonderful +composable parsers and lets each subcommand have its own data type +repesenting all its options. + +What pushed me over the edge is that optparse-applicative has automatic +bash completion! + + # source <(git-annex --bash-completion-script `which git-annex`) + # git-annex fsck - + --all --key -S + --from --more -U + +Since nobody has managed to write a full bash completion for git-annex +before, let alone keep it up-to-date with changes to the code, automating +the problem away is a really nice win. :) + +The conversion is a rather huge undertaking; the diff is already over 3000 +lines large after 8 hours of work, and I'm maybe 1/3rd done, with +the groundwork laid (except for global options still todo) and a few +subcommands converted. This won't land for this week's release; it'll +need a lot of testing before it'll be ready for any release. |