auto generate man page, update clap, CI cleanup #776
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We use the new AppSettings::AllArgsOverrideSelf to permit all flags to be specified multiple times. This removes the need for our previous work-around where we would enable `multiple` for every flag and then just extract the last value when consuming clap's matches. We also add a couple regression tests that ensure repeated switches and flags work as expected.
This commit makes a small tweak to the --max-columns flag. Namely, if the value of the flag is 0, then ripgrep behaves as-if the flag were absent. This is useful in the context of ripgrep reading configuration from the environment. For example, an end user might set --max-columns=150, but we should permit the user to disable this setting when needed. Using -M0 is a nice way to do that. We do this because a zero value for --max-columns isn't particularly meaningful. We do leave the --max-count, --max-filesize and --maxdepth flags alone though, since a zero value for those flags is potentially meaningful. (--max-count even has tests for ripgrep's behavior when given a value of 0.)
This cleans up our CI scripts but doesn't significantly change anything. Mostly this is removing dead code and wrong comments, and making the style a bit more consistent.
This commit uses the recent refactoring for defining flags to automatically generate a man page. This finally allows us to define the documentation for each flag in a single place. The man page is generated on every build, if and only if `asciidoc` is installed. When generated, it is placed in Cargo's `OUT_DIR` directory, which is the same place that shell completions live.
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This was referenced Feb 20, 2018
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This PR improves the quality of life for ripgrep maintainers and includes a tweak to the
-M/--max-columnsflag to interpret0as if the flag were omitted.Quality of life improvements:
asciidocinstalled. 馃帀2.29.4and remove the previous work-around for permitting self-overriding flags and use official clap support for it instead.