[gentoo-commits] proj/devmanual:master commit in: general-concepts/dependencies/

["Ulrich Müller" <ulm@gentoo.org>]

commit:     6ea40822c59d94513f80f8a6d14c125c8e9aec0c
Author:     Florian Schmaus <flow <AT> gentoo <DOT> org>
AuthorDate: Thu Dec 23 19:19:10 2021 +0000
Commit:     Ulrich Müller <ulm <AT> gentoo <DOT> org>
CommitDate: Fri Jun 24 09:12:27 2022 +0000
URL:        https://gitweb.gentoo.org/proj/devmanual.git/commit/?id=6ea40822

general-concepts/dependencies: add paragraph explaining example

Add a small paragraph explaining the existing slot-operator example.

This is scavenged from my proposed change for bug #739858.

Signed-off-by: Florian Schmaus <flow <AT> gentoo.org>
Bug: https://bugs.gentoo.org/739858
[Commits squashed; small fixes according to style guide.]
Signed-off-by: Ulrich Müller <ulm <AT> gentoo.org>

 general-concepts/dependencies/text.xml | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/general-concepts/dependencies/text.xml b/general-concepts/dependencies/text.xml
index 0ff903d..689fad0 100644
--- a/general-concepts/dependencies/text.xml
+++ b/general-concepts/dependencies/text.xml
@@ -421,6 +421,38 @@ RDEPEND="media-libs/cogl:1.0=
 	gnutls? ( &gt;=net-libs/gnutls-2.8:= )"
 </codesample>
 
+<p>
+means that only the '1.0' slot is acceptable for <c>media-libs/cogl</c> and
+that sub-slot changes of <c>media-libs/cogl</c> will cause a rebuild of the
+dependent package. It furthermore means that every slot of
+<c>net-libs/gnutls</c> is acceptable but any slot change is causing a rebuild.
+</p>
+
+<p>
+The <c>:slot</c> dependency syntax continues to behave like in <c>EAPI=4</c> or
+earlier, i.e. it indicates that only the specific slot value is acceptable and
+that the package will not break when the currently installed version of the
+dependency is replaced by a version with a different sub-slot.
+</p>
+
+<p>
+For example:
+</p>
+
+<codesample lang="ebuild">
+RDEPEND="dev-libs/foo:2=
+    &gt;=dev-libs/bar-0.9:=
+    media-gfx/baz:*
+    x11-misc/wombat:0"
+</codesample>
+
+<p>
+means that the package should be rebuilt when <c>foo:2</c> or
+<c>&gt;=bar-0.9</c> are upgraded to versions with different subslots. On the
+other hand, changes in slot or sub-slots of <c>baz</c> should be ignored, and
+sub-slot changes of <c>wombat:0</c> should be ignored.
+</p>
+
 </body>
 </subsubsection>
 </subsection>