evolve: support successors of ancestor of orphan with multiple roots
The previous code checked that the set of successors has a single root.
However, there’s no reason to require that in general.
Example:
o 6
|
o 5
|\
| o 4
| |
o | 3
|/
| * 2
| |
| x 1
|/
o 0
1 is obsoleted by 3, 4 and 6. We are considering the case when 2 gets evolved.
The roots are [3, 4] and the heads are [6]. Before the change, the user was
asked which destination to choose, but there was only one choice (6). After the
change, 6 is chosen as the destination.
=============================
Training supports
=============================
Contributing
============
The main source for the supports is the `slides.md` but it doesn't contains
all the source.
The `slides.md` file contains several snippets that are replaced by other
files at compilation time.
For example:
.. code:: markdown
~~~raw-file
output/fix-a-bug-base.log
~~~
Will replace this three lines by the content of the file `output/fix-a-bug-
base.log` which is generated when running the .t test file (see below for
instruction how to do that).
.. code:: markdown
~~~graphviz-file
graphs/fix-bug-1.dot
~~~
Will replace this three lines by the svg rendering of the graphviz definition
in the file `graphs/fix-bug-1.dot`. This file is generated when running the .t
test file (see below for instruction how to do that).
Environment preparation
=======================
This training supports needs pandoc to compile.
You'll need a copy of the Mercurial source in order to generate the training
supports.
You will also needs a functioning Python environment with the possibility to
use `pip install` with your current user. In doubt, you can use a `virtualenv
<https://virtualenv.pypa.io/en/stable/>`.
You can then run the `prepare.sh` script that will configure the environment
for you.
Generating the supports
=======================
First, you need to run a .t test file to generate a bunch of files. You can
run the test file with this command:
`python /PATH/TO/MERCURIAL/tests/run-tests.py -l test-training.t`
It should have generated files in at least two directories: `graphs` and
`output`.
Finally, launch the `compile.sh` to generate the `index.html` output file.