graph-depends improvements (branch yem/graphs)

From: "Yann E. MORIN" <[email protected]>

Hello All!

This series brings a few improvements to the graph-depends utility:

- add option to remove transitive dependencies
- add option to pas arbitrary args to the dot utility
- cleanup and re-arrange the code

This series is open for discusion, especially on how we pass options to the graph generators:

- support/scripts/graph-depends: needs to know whether to generate transitive dependencies or not, and how deep to limit the dependencies

- the 'dot' utility: needs to know whether to graph top-down or left-right (or whatever), the type of graph (tree, circle...) and so on...

Currently, environment variables are used, but that is not in the tastes of some (me including), but I can't see a better way.

Peter suggested using kconfig knobs, but it does not scale when you want different settings for different graphs (e.g, different depth level for different packages).

Samuel suggested using a config file, but it has the same issues as the kconfig options. He also suggested pasing a single environment variable, but that does not work since some options are for graph-depends shile others are for dot.

So I went for adding a new variable to pass options to dot.

Changes v3 -> v4:
- include Fran?ois' host-package colours (Fran?ois)
- fix commit log (Thomas)
- add option for colours, add to manual

Changes v2 -> v3:
- pythonise even further the handling of --depth (Samuel)
- rename BR2_GRAPH_DEPTH to BR2_GRAPH_DEPS_OPTS
- introduce BR2_GRAPH_DOT_OPTS
- update manual accordingly

Changes v1 -> v2:
- complete rewrite, split into a series

Regards,
Yann E. MORIN.

The following changes since commit ed1182641812986f529b2150635f1e93c799a419:

xserver_xorg-server: add support for xtensa architecture (2014-06-08 15:51:00 +0200)

are available in the git repository at:

git://gitorious.org/buildroot/buildroot.git yem/graphs

for you to fetch changes up to fa5477ea2ced52b952961623097578564a7247b6:

manual: document the new graph-depends options (2014-06-08 15:58:27 +0200)

----------------------------------------------------------------
Francois Perrad (1):
graph-depends: refactor with more colors

Yann E. MORIN (8):
graphs: add option to remove transitive dependencies in dependency graph
graphs-depends: merge redundant-dependencies elimination
graph-depends: handle the depth argument in a more pythonic way
graph-depends: add option to set the colours
graph-depends: document the 'transitive' variable
graph-depends: rename the mode constants
graph-depends: add option to pass arbitrary dot options
manual: document the new graph-depends options

 Makefile                      |   2 +-
 docs/manual/common-usage.txt  |  11 ++-
 package/pkg-generic.mk        |   2 +-
 support/scripts/graph-depends | 161 +++++++++++++++++++++++++++---------------
 4 files changed, 115 insertions(+), 61 deletions(-)

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