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authorLudovic Courtès <ludo@gnu.org>2019-01-25 13:57:38 +0100
committerLudovic Courtès <ludo@gnu.org>2019-01-25 14:06:37 +0100
commitbd414e273c2010132895a645b623035c218eb437 (patch)
treedf696fb69afd8a9a7c37a2fcf4c0377460f64481 /doc
parentaf77219e8a59c9d04cda349b26b7f30ea5cf3ab1 (diff)
downloadguix-bd414e273c2010132895a645b623035c218eb437.tar
guix-bd414e273c2010132895a645b623035c218eb437.tar.gz
weather: Add '--coverage'.
* guix/scripts/weather.scm (show-help, %options): Add '--coverage'. (package-partition-boundary, package->output-mapping) (substitute-oracle, report-package-coverage-per-system) (report-package-coverage): New procedures. (guix-weather): Honor '--coverage'. * doc/guix.texi (Invoking guix weather): Document it.
Diffstat (limited to 'doc')
-rw-r--r--doc/guix.texi35
1 files changed, 34 insertions, 1 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index afc0ef8615..a182e1edee 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -9709,7 +9709,9 @@ key is authorized. It also reports the size of the compressed archives
(``nars'') provided by the server, the size the corresponding store
items occupy in the store (assuming deduplication is turned off), and
the server's throughput. The second part gives continuous integration
-(CI) statistics, if the server supports it.
+(CI) statistics, if the server supports it. In addition, using the
+@option{--coverage} option, @command{guix weather} can list ``important''
+package substitutes missing on the server (see below).
To achieve that, @command{guix weather} queries over HTTP(S) meta-data
(@dfn{narinfos}) for all the relevant store items. Like @command{guix
@@ -9737,6 +9739,37 @@ Instead of querying substitutes for all the packages, only ask for those
specified in @var{file}. @var{file} must contain a @dfn{manifest}, as
with the @code{-m} option of @command{guix package} (@pxref{Invoking
guix package}).
+
+@item --coverage[=@var{count}]
+@itemx -c [@var{count}]
+Report on substitute coverage for packages: list packages with at least
+@var{count} dependents (zero by default) for which substitutes are
+unavailable. Dependent packages themselves are not listed: if @var{b} depends
+on @var{a} and @var{a} has no substitutes, only @var{a} is listed, even though
+@var{b} usually lacks substitutes as well. The result looks like this:
+
+@example
+$ guix weather --substitute-urls=https://ci.guix.info -c 10
+computing 8,983 package derivations for x86_64-linux...
+looking for 9,343 store items on https://ci.guix.info...
+updating substitutes from 'https://ci.guix.info'... 100.0%
+https://ci.guix.info
+ 64.7% substitutes available (6,047 out of 9,343)
+@dots{}
+2502 packages are missing from 'https://ci.guix.info' for 'x86_64-linux', among which:
+ 58 kcoreaddons@@5.49.0 /gnu/store/@dots{}-kcoreaddons-5.49.0
+ 46 qgpgme@@1.11.1 /gnu/store/@dots{}-qgpgme-1.11.1
+ 37 perl-http-cookiejar@@0.008 /gnu/store/@dots{}-perl-http-cookiejar-0.008
+ @dots{}
+@end example
+
+What this example shows is that @code{kcoreaddons} and presumably the 58
+packages that depend on it have no substitutes at @code{ci.guix.info};
+likewise for @code{qgpgme} and the 46 packages that depend on it.
+
+If you are a Guix developer, or if you are taking care of this build farm,
+you'll probably want to have a closer look at these packages: they may simply
+fail to build.
@end table
@node Invoking guix processes