Mathieu Lirzin <[email protected]> skribis:
> The test case contains the example "guile-2.0.6.65-134c9" which
> invalidates my proposal. Here is another idea which identifies the
> version part by the presence of dots. WDYT?
Sometimes the version part does not contain dots, as in “diffoscope-34”.
Here’s the complete list of dot-less versions:
--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> ,use(gnu packages)
scheme@(guile-user)> (fold-packages (lambda (p r)
(if (string-index (package-version p) #\.)
r
(cons (package-full-name p) r)))
'())
$38 = ("xterm-320" "unclutter-8" "tidy-20091223" "perl-uri-find-20140709"
"libx264-20150706-2245" "vapoursynth-28" "texlive-texmf-2015"
"texlive-bin-2015" "texlive-2015" "scmutils-20140302"
"perl-regexp-common-2013031301" "parallel-20151122" "diffoscope-34"
"mg-20050429" "ngircd-22" "bootstrap-tarballs-0" "static-binaries-tarball-0"
"usbutils-006" "kmod-17" "less-481" "libjpeg-9a" "libjpeg-8d" "hugs-Sep2006"
"ghc-bifunctors-5" "ghc-nats-1" "brdf-explorer-17" "libgudev-230" "psutils-17"
"gcal-4" "libspiro-20071029" "fontforge-20120731-b"
"font-gnu-freefont-ttf-20100919" "pcb-20140316" "paredit-24"
"sfarkxtc-b5e0a2ba39" "lz4-131" "ld-wrapper-0" "glibc-bootstrap-0"
"gcc-bootstrap-0" "binutils-bootstrap-0" "bootstrap-binaries-0" "bless-1p02"
"tzdata-2015c" "freepats-20060219" "acpica-20150410")
--8<---------------cut here---------------end--------------->8---
Would they still be suitably parsed?
I liked that the initial algorithm was trivial, as in Nix:
--8<---------------cut here---------------start------------->8---
/* Parse a derivation name. The `name' part of a derivation name is
everything up to but not including the first dash *not* followed by
a letter. The `version' part is the rest (excluding the separating
dash). E.g., `apache-httpd-2.0.48' is parsed to (`apache-httpd',
'2.0.48'). */
DrvName::DrvName(const string & s) : hits(0)
{
name = fullName = s;
for (unsigned int i = 0; i < s.size(); ++i) {
/* !!! isalpha/isdigit are affected by the locale. */
if (s[i] == '-' && i + 1 < s.size() && !isalpha(s[i + 1])) {
name = string(s, 0, i);
version = string(s, i + 1);
break;
}
}
}
--8<---------------cut here---------------end--------------->8---
Another option would be to return a list of possible name version pairs,
and to change the UI to try them one after another? The downside would
be that it moves complexity to the UI. Hmm…
Ludo’.
