docker: use stable tags for fedora and centos
A moving target is rarely useful.
dockerrpm: prepare source outside docker and just run rpmbuild inside docker
Simplifies the rpm build process.
We will use platform specific rpmbuild directories and will not clean them and
will drop the explicit copy to build directory.
dockerrpm: run docker build process as the current user, not as root
Docker can be run by ordinary users if they are in the docker group. The build
process would however be run as a root user, only protected by the sandboxing.
That caused problems with the shared directory where rpmbuild would be picky
about building from sources owned by less privileged users and producing files
owned by root.
Instead, add a build user with the right uid/gid to the image and run the
docker process as that user.
buildrpm: introduce --rpmdir instead of using hardcoded rpmbuild dir
Used as rpm _topdir when preparing spec and source and building rpms.
templater: add "diff" template function
"diff" allows to embed changes in the target revision into template
output, even if the command itself doesn't take "--patch" option
Combination of "[committemplate]" configuration and "diff" template
function can achieve the feature like
issue231 ("option to have diff
displayed in commit editor buffer")
http://bz.selenic.com/show_bug.cgi?id=231
For example, templating below can be used to add each "diff" output
lines "HG: " prefix::
{splitlines(diff) % 'HG: {line}\n'}
This patch implements "diff" not as "a template keyword" but as "a
template function" to take include/exclude patterns at runtime.
It allows to specify target files of command (by -I/-X command line
options) and "diff" separately.
formatter: add pickle format
This gives convenient Python2 output. Python 3 users will need encoding=bytes.
commands: add hidden -T option for files/manifest/status/tags
These commands have generic formatting support but no way to enable it
yet. When this feature is more fully developed, this flag will be unhidden.