Back when the class was written, for the packaging code, it made sense
that the default was True. But now that it's used all over the place,
and that the vast majority of uses are with find_executables=False, it
makes more sense for that to be the default.
And make it an error not to give it. While the default is True, we do
pass a value of False wherever it makes sense, which happens to be, in
most places.
This is an intermediate step to flip the default from True to False,
ensuring that we don't unwantedly switch some calls to False.
Previously, we always skipped over files beginning with a ".". This
commit adds an option to include them.
This is needed to support test package generation via Python / mozpack.
The hglib Mercurial finder was nice. But it is somewhat slow, as it
involves a separate Mercurial process.
This commit introduces a native Mercurial finder that speaks directly
to a Mercurial repository instance. It is significantly faster.
The new code is isolated to its own file because it imports Mercurial
code, which is GPL.
The moz.build reader uses absolute paths when referencing moz.build
files. *Finder classes expect paths to be relative to a base. When we
switched the reader to use *Finder instances for I/O, we simply provided
a default FileFinder based at the filesystem root. This was quick and
easy. Things worked.
Unfortunately, that solution isn't ideal because not all *Finder
instances can accept absolute paths like that. The
MercurialRevisionFinder is one of them.
Changing the moz.build reader to talk in terms of relative paths is a
lot of work. While this would be ideal, it is significantly easier to
defer the problem until later and hack up MercurialRevisionFinder to
accept absolute paths. This commit does exactly that.
Bug 1171069 has been filed to track converting BuildReader to relative
paths.
Now that moz.build files use finders for I/O, we can start reading
moz.build data from other sources.
Version control is essentially a filesystem. We implement a finder
that speaks to Mercurial to obtain file data. It is able to obtain
file data from a specific revision in the repository.
We use the hglib package (which uses the Mercurial command server) for
speaking with Mercurial. This adds overhead compared to consuming the
raw Mercurial APIs. However, it also avoids GPL side-effects of
importing Mercurial's Python modules.
Testing shows that performance is good but not great. A follow-up
commit will introduce a GPL licensed Mercurial finder. For now, get
the base functionality in place.
Today, the *Finder classes are optimized for doing matching and
returning multiple results. However, sometimes only looking for a
single file is wanted.
This commit implements the "get" method on all the *Finder classes.
It returns a BaseFile or None.
FileFinder._find_file has been refactored into FileFinder.get
to avoid code duplication.
Back when mozpack.path was added, it was used as:
import mozpack.path
mozpack.path.func()
Nowadays, the common idiom is:
import mozpack.path as mozpath
mozpath.func()
because it's shorter.
$ git grep mozpath\\. | wc -l
423
$ git grep mozpack.path\\. | wc -l
123
This change was done with:
$ git grep -l mozpack.path\\. | xargs sed -i 's/mozpack\.path\./mozpath./g'
$ git grep -l 'import mozpack.path$' | xargs sed -i 's/import mozpack.path$/\0 as mozpath/'
$ (pat='import mozpack.path as mozpath'; git grep -l "$pat" | xargs sed -i "1,/$pat/b;/$pat/d")
Smart xpt linking will keep around [scriptable] interfaces and anything
those interfaces depend on. Modify the tests that deal with xpt linking
so they use [scriptable] interfaces, ensuring that the tests continue to
work in the face of smarter linkers.
