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authorLudovic Courtès <ludo@gnu.org>2021-10-01 22:47:33 +0200
committerLudovic Courtès <ludo@gnu.org>2021-10-25 19:02:33 +0200
commit9730692d9f06f8c412b45ef108006921298983c4 (patch)
treef778fff90b81323c47612419710fd26e40f912df /doc
parent2cb0b3709ace41078872578f657ab0ee45d20ac9 (diff)
downloadguix-9730692d9f06f8c412b45ef108006921298983c4.tar
guix-9730692d9f06f8c412b45ef108006921298983c4.tar.gz
shell: Maintain a profile cache.
shell: Maintain a profile cache. With this change, running "guix shell" (no arguments) is equivalent to: guix environment -r ~/.cache/guix/profiles/some-root -l guix.scm This is the cache miss. On cache hit, it's equivalent to: guix environment -p ~/.cache/guix/profiles/some-root ... which can run in 0.1s. * guix/scripts/shell.scm (options-with-caching): New procedure. (parse-args): Use it. (%profile-cache-directory): New variable. (profile-cache-key, profile-cached-gc-root): New procedures. (show-help, %options): Add '--rebuild-cache'. (guix-shell)[cache-entries, entry-expiration]: New procedures. Add call to 'maybe-remove-expired-cache-entries'. * doc/guix.texi (Invoking guix shell): Document '--rebuild-cache'.
Diffstat (limited to 'doc')
-rw-r--r--doc/guix.texi11
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 5809bbacd4..093e354509 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5769,6 +5769,17 @@ This is similar to the same-named option in @command{guix package}
(@pxref{profile-manifest, @option{--manifest}}) and uses the same
manifest files.
+@item --rebuild-cache
+When using @option{--manifest}, @option{--file}, or when invoked without
+arguments, @command{guix shell} caches the environment so that
+subsequent uses are instantaneous. The cache is invalidated anytime the
+file is modified.
+
+The @option{--rebuild-cache} forces the cached environment to be
+refreshed even if the file has not changed. This is useful if the
+@command{guix.scm} or @command{manifest.scm} has external dependencies,
+or if its behavior depends, say, on environment variables.
+
@item --pure
Unset existing environment variables when building the new environment, except
those specified with @option{--preserve} (see below). This has the effect of