combo-layer: modified to generate better commit messages.
This patch includes support for a global section in combo-layer.conf
called [combo-layer-settings]. Supported in this section is key
"commit_msg"; its value is the template for the git commit message
that updates the last_revision. The template can include substitution
for the updated component list: ${components}. The substituted value
will either be a comma-separated list of components or "all components",
if combo-layer was invoked without component list argument.
If the key is not present, the old default value is used for the commit
message.
Configuration file example:
[combo-layer-settings]
commit_msg = pulled in the latest changes for ${components}.
Signed-off-by: Ismo Puustinen <ismo.puustinen@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
