Ninja supports deps and depfile properties specified on build
statements, allow them to be specified in BuildParams.
Change-Id: I46eac5571350426f1419908def21f7d042f8739a
Turn PackageContext into an interface so that build systems can wrap it
to add more custom helpers.
This does introduce an API change, though it should be fairly simple.
NewPackageContext used to provide an opaque *PackageContext struct, now it
provides a PackageContext interface.
Change-Id: I383c64a303d857ef5e0dec86ad77f791ba4c9639
For implicit dependencies that will be common to all users of a Rule,
add a new field 'CommandDeps' to the RuleParam. This is a list of
strings to be prepended to the implicit dependencies in each BuildParam.
This lets us have the dependencies declared next to where they are used,
instead of duplicated in areas that may be far apart.
I looked at passing this information down to ninja too, but it only
saves us a few percent of ninja file, and requires a modification to the
ninja file format.
Change-Id: Ifd910dee1506d4e32a76ed06206f853c4caec622
Make integrating with go tools easier by putting the blueprint package
files in the top level directory of the git project instead of in a
subdirectory called blueprint.
Change-Id: I35c144c5fe7ddf34e478d0c47c50b2f6c92c2a03
