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support/scripts/graph-depends allow for forward and reverse depends on same graph

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The current implementation of buildroot depe dependency graphing
either does forward- or reverse-dependency traversal.

This patch enables buildroot to graph forward and reverse dependencies
on the graph for the same package: (Diagram Credit: Yann E. MORIN)

    $ make pkg-d-graph-both-depends

    pkg A -.            .-> pkg E
            \          /
    pkg B ----> pkg D ----> pkg F
            /          \
    pkg C -'            '-> pkg G

In the above example a single graph shows pkg {A,B,C} are needed
by pkg D, and pkg D is a dependency of pkg {E,F,G}.

Makefile help and manual are also updated.

Signed-off-by: Steve Hay <me@stevenhay.com>
[Arnout:
 - remove DEPTH and RDEPTH, their functionality is already covered by
   BR2_GRAPH_DEPS_OPTS;
 - remove --rdepth, it was felt to not add sufficient added value;
 - add the new target to the manual;
 - fix flake8 errors.
]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
This commit is contained in:
ʎɐH ǝʌǝʇS
2023-01-24 00:12:23 +01:00
committed by Arnout Vandecappelle
parent 0c2e6050cc
commit ca6c896bdd
4 changed files with 50 additions and 27 deletions
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3
Makefile
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@@ -1171,6 +1171,9 @@ help:
@echo ' - Recursively list packages which have <pkg> as a dependency'
@echo ' <pkg>-graph-depends - Generate a graph of <pkg>'\''s dependencies'
@echo ' <pkg>-graph-rdepends - Generate a graph of <pkg>'\''s reverse dependencies'
@echo ' <pkg>-graph-both-depends'
@echo ' - Generate a graph of both <pkg>'\''s forward and'
@echo ' reverse dependencies.
@echo ' <pkg>-dirclean - Remove <pkg> build directory'
@echo ' <pkg>-reconfigure - Restart the build from the configure step'
@echo ' <pkg>-rebuild - Restart the build from the build step'