Add support for contents checksums. This is meant to be used for tarballs
like the ones coming from https://*.googlesource.com/ which on every download
change their outer checksum due to being packaged with different date/time
stamps or similar.
If such a distfile still contains the same files as the author of a template
found, then the checksum of its contents can be specified by prepending a
commercial at (@) to the corresponding checksum="..." line.
Depending on the format of the distfile its entire contents will then be
piped into sha256sum and the resulting digest is verified against what
follows after the @.
- python_module build style now builds modules for python2/3 by default
- new python2_module and python3_module build styles for building
python2-only and python3-only packages respectively
- no more python_versions
- no need to define pycompile_version for Python modules anymore
(still needed for non-Python modules though)
- Python version and paths are now guessed automatically and a set of
useful variables can now be used in templates
- #!/usr/bin/python2 and #!/usr/bin/python3 are now the default shebangs
- /usr/bin/foo2 and /usr/bin/foo3 are now the default names for bin
scripts (for use with alternatives)
The `etc/virtual` file declares the default package to be built for
virtual dependencies declared as "virtual?foo" in $depends.
Before this change, the run-time dependency was added as is to the final
binary package but no pkg providing this virtual pkg was built.
With this file we declare the *default* pkg to be built.
NOTE: "virtual?foo" is only applicable to *run* time dependencies, i.e
only those declared in $depends.
If a distfile changed its checksum (SHA256) without at the same time
also changing its version, the distfile cache needs to be purged.
This is done by verifying only for already existing distfiles that the
specified checksum matches. If it does not, the file and its entry in
/host/sourcers/by_sha256 are purged using the inode number of the file.
The second loop then as usual fetches the distfiles and verifies their
checksum against the list entry.
+ drbd-utils fix checksum and also build + cross build
