72b737a42f
This was supposed to be just a fix for #1404 but upon visiting the source several issues became apparent and that is why the commit grew a bit more than expected. A complete list of changes bellow: * Fix #1404 No more orphaned temporary directories. Commands, options, etc. that used to be stored in there are included at build-time as here documents in the source. * Fix artifacts in =/tmp= after build Upon fixing the above I became aware that the build itself was leaving behind a heap of artifacts in =/tmp= that were not taken care of with a ~make clean~. Fixed by using temporary files and directories in the build directory. Makefile and build scripts adjusted. * Produce command aliases Regular expressions in build scripts changed to produce all command aliases except single letter ones (see below) * Do not propose single letters completions It is simply not useful and adds a lot of noise. It makes completion slower as well because you need to hit yes on the prompt: > Display all 200 possibilities? (y or n) =output-options.sh= now excludes those. * Query filters simplified Keep only the prefix of the filter with the colon in =query-filters.txt=. This change has two reasons: - Single letter completions are not useful (see above) - It allows for completion suggestions specific to each - Bonus reason: it's a completion engine, not a user manual. * Fix completion impacts on global environment The completion script was making a couple of changes to the global environment which had an impact for the rest of the shell session. ~set -o pipefail~: the change is hidden from the user and could lead to subtle errors throughout the shell session COMP_WORDBREAKS=" ": this affects subsequent completions for us and other programs too. I exclude the colon =:= from its value and use ~compopt -o filenames~ to handle escaping of special characters for us. I would like to find a solution without messing with COMP_WORDBREAKS but it is not straight forward. * Fix hiding of legit subcommands Completion was hiding all possibilities if a subcommand happens to be the prefix of another. On typing ~balance~, one should be proposed ~balancesheet~ and ~balancesheetequity~ as well. * Return early Try to complete depending on the current context and return immediately if successful. Keep completion list relevant and as short as possible. * Context aware completion - Add handlers for option parameter completion, see _hledger_compreply_optarg() - Add handlers for query filters:, see _hledger_compreply_query() - Use --file and --rules-file arguments when proposing completions for the above, see _hledger() - Propose only top level accounts at first. Again, keep it short and focused. * Custom ~compgen~ wrapper ~compgen~ is fairly complicated. There is no way to feed it a word list with literals. It will mangle your input in so many ways that we cannot trust it. To work around this several wrappers are used: _hledger_compgen() works with _hledger_quote_by_ref() to process and escape newline separated input which is then fed to ~compgen~ and finally in ~COMPREPLY~ through _hledger_compreply() and _hledger_compreply_append(). It sounds messy and I guess it is, I would like to find a more straight forward way to do it. I think it is still a way better and safer interface with ~readline~ than trying to ~grep~ our way through. * Replace ~declare~ with ~local~ Again, this script is sourced by the shell -- keep variable scopes as narrow as possible. * Use ~compopt -o nosort~ Often I resort to using it to keep different groups of completions together. Whether this is more ergonomic or not is subjective. But our input lists are already sorted at build-time so why not. Sort manually =query-filters.txt= when changing it. * Remove irrelevant comments And add some new ones :) I think that is all. Give it a spin, try to abuse it, in and outside of quotes, with some funky accounts, payees, tags, whatever, and tell me where it breaks or behaves unexpectedly.
24 lines
637 B
Bash
Executable File
24 lines
637 B
Bash
Executable File
#!/bin/bash
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# Output short and long options from man/usage text
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set -o errexit -o pipefail -o nounset
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main() {
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declare tmpdir="_options.tmp"
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declare tmp="${tmpdir}/${1:-generic}"
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mkdir -p "$tmpdir"
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cat > "$tmp"
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# Do not propose single letter completions. It's not useful, it's noisy
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# and it makes completion slower:
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# Display all 200 possibilities? (y or n)
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# sed -rn 's/.* (-[a-zA-Z0-9]).*/\1/gp' < "$tmp"
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# Do not print '=' after long options with arg because it makes completion
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# for option arguments harder.
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sed -rn 's/.* (--[a-zA-Z][-_a-zA-Z0-9]*)=?.*/\1/gp' < "$tmp"
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}
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main "$@"
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