This patch makes the get_description.py script easier to use by the
documentation automation:
1. The script is now a library.
2. You can choose the output of the script, currently supported pipee
and yml.
You can still call the from the command line, like before, but you can
also calls it from another python script.
For example the folowing python script would generate the documentation
for the metrics description of the ./alternator/ttl.cc file.
```
import get_description
metrics = get_description.get_metrics_from_file("./alternator/ttl.cc", "scylla", get_description.get_metrics_information("metrics-config.yml"))
get_description.write_metrics_to_file("out.yaml", metrics, "yml")
```
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
Closesscylladb/scylladb#18136
The get_description script parse a c++ file and search of metrics
decleration and their description.
It create a pipe delimited file with the metric name, metric family
name,description and location in file.
To find all description in all files:
find . -name "*.cc" -exec grep -l '::description' {} \; | xargs -i ./get_description.py {}
While many of the metrics define in the form of
_metrics.add_group("hints_manager", {
sm::make_gauge("size_of_hints_in_progress", _stats.size_of_hints_in_progress,
sm::description("Size of hinted mutations that are scheduled to be written.")),
Some metrics decleration uses variable and string format.
The script uses a configuration file to translate parameters and
concatenations to the actual names.
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
