Hi Ashley, Sounds like you've put some work into this. You could compare against `quse -D <flag>` (from portage-utils) as well to get another point of measure.
I don't know what you did measure euses against though, it seems fairly fast to me (env PORTDIR=`q -e PORTDIR` euses -v libressl), is there a specific case you're focussing on? Thanks, Fabian On 09-07-2020 02:33:28 +0100, Ashley Dixon wrote: > Hi, Gentoo-Dev. > > A while ago, I had a bit of a rant on Gentoo-User regarding the current > issues > with `app-portage/euses`. Specifically, the fact that it does not work on > newer > Gentoo-like systems which have moved away from PORTDIR and conform to > the > repos.conf/ syntax [1, 2, 3]. There are also some bugs/issues in the code, > such > as malloc(3)'ing without checking the result, et cetera. > > Over the past month or so, I've completed a ground-up rewrite which provides > a > similar interface and functionality, that remedies all of these issues, and > adds > a few useful features on top; it is also written in standard C with > no > dependencies other than the standard library. In addition to processing all > the > repositories described in the repos.conf directory, it is also written to > be > remarkably robust, optionally working from the PORTDIR make.conf key-value > pair > or environment variable for legacy systems. (As an initial user pointed > out, > make.conf cannot be used if it is a directory, and will only touched at all > if > the legacy option is enabled and the $PORTDIR environment variable is unset > or > infeasible.) > > Almost all of the features from the original euses tool are present, with > extras > to facilitate multi-repo searching (in the rare event that a > non-Gentoo.git > repository has USE-description files). From my testing, it is equally, if > not > more, performant than the original tool, despite the extra work of > traversing > the meta-repository description files. A copy of the help page is included > here, > for convenience (run with the `-h` or `--help` option): > > ash-euses command-line argument summary. > Syntax: ./ash-euses [options] substrings > > --list-repos -r Prepend a list of located repositories (repos.conf/ only). > --repo-names -n Print repository names for each match. > --repo-paths -p Print repository details for each match (implies > repo-names). > --help -h Print this help information and exit. > --version -v Prepend version and license information to the output. > --strict -s Search only in the flag field, excluding the description. > --portdir -d Attempt to use the PORTDIR value. > --quiet -q Do not complain about PORTDIR. > --no-case -c Perform a case-insensitive search across the files. > --print-needles -e Prepend each match with the relevant needle substring. > --no-interrupt -i Do not interrupt the search results with warnings. > --package -k Restrict the search to category-package description files. > --colour -o Print the package, flag, and description in distinct > colours. > -- Consider all further arguments as substrings/queries. > > There's also a man page in the tree, providing deeper explanations for > these > command-line arguments: `ash-euses.1`. > > Off-line, I'm working on a strstr(3) (and strcasestr) reimplementation using > the > Two-Way string-matching algorithm [4] and shift tables, to remove the > dependency > on _GNU_SOURCE for the case-insensitive variant (it is very annoying that > this > is not a standard function, as it only defines CANON_ELEMENT to tolower(3) > and > calls glibc strstr [5]). > > For all my tests, the search yield is generally identical to euses(1). An > ebuild > is also included in the tree, however I am hardly experienced with writing > them, > so I'm not entirely sure if it respects the globally defined compiler > flags. > Regardless, I am posting here for anyone who is interested in using/testing > this > program, with the hope that it can provide an alternative for quick > flag-lookup > on newer, standards-conformant Gentoo-like systems. > > The source code is at [6], and a gzipped tarball of the latest release > (v0.3) > can be found at [7]. Thank you in advance to all interested parties. > > Cheers, > Ashley. > > P.S. I really need a better name for this. A portmanteau of my first name, > and > the tool of which the program is a replica, doesn't seem very creative. > > [1] https://bugs.gentoo.org/546210 > [2] https://bugs.gentoo.org/378603 > [3] https://bugs.gentoo.org/663706#c4 > [4] https://dl.acm.org/doi/abs/10.1145/116825.116845 > [5] > https://sourceware.org/git/?p=glibc.git;a=blob;f=string/strcasestr.c;h=d2964c5548b9ea7a68fc5b18b25ddfe7ddd6835c;hb=HEAD#l45 > [6] http://git.suugaku.co.uk/ash-euses/tree/ > [7] http://git.suugaku.co.uk/ash-euses/snapshot/ash-euses-0.3.tar.gz > > -- > > Ashley Dixon > suugaku.co.uk > > 2A9A 4117 > DA96 D18A > 8A7B B0D2 > A30E BF25 > F290 A8AA > -- Fabian Groffen Gentoo on a different level
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