Force log level at exec time (#23) · Issues · CamiTK / CamiTK Community Edition

Force log level at exec time


As a	CEP developer
I would like to	change the log level and parameters at run time
So that	I don't have to re-compile my executable eveytime I need to check something or diagnose a problem
Epic/Topics	Log system

Description / Overview

Choose one of (or both) solution:

enable the possibility to force the log parameter using environment variable, e.g.::ab:

CAMITK_LOG_LEVEL=WARNING CAMITK_LOG_TO_STDOUT=FALSE CAMITK_LOG_TO_FILE=TRUE CAMITK_LOG_FILE_DIRECTORY=/tmp camitk-imp"

to force camitk-imp running with these log parameters instead of those defined in source or settings Caveat: you need to modify the environment variable and access to it from the code. Not really a problem, but can be tricky for people who don't understand it properly, modify their global environment (e.g. in ~/.bashrc) and then forgot they had define these things.

manage a --debug=[options] argument from the command line execution for all CamiTK application with different options:

log level:
le (error)
lw (warning)
li (info)
lt (trace)

d (display debug)

s (display time stamp)

log message:
me
mw
mi
mt
p

Hints

Use Qt to read the environment variables and modify the application properties accordingly
Add a flag to camitk-imp and camitk-config arguments

Acceptance tests

there are more tests of the testlogger class that shows it work
the Log System document is updated accordingly

## Description / Overview

Choose one of (or both) solution:

1. enable the possibility to force the log parameter using environment variable, e.g.::ab: 
```bash
CAMITK_LOG_LEVEL=WARNING CAMITK_LOG_TO_STDOUT=FALSE CAMITK_LOG_TO_FILE=TRUE CAMITK_LOG_FILE_DIRECTORY=/tmp camitk-imp"
```
to force `camitk-imp` running with these log parameters instead of those defined in source or settings
Caveat: you need to modify the environment variable and access to it from the code. Not really a problem, but can be tricky for people who don't understand it properly, modify their global environment (e.g. in ~/.bashrc) and then forgot they had define these things.

2. manage a `--debug=[options]` argument from the command line execution for all CamiTK application with different options:

```bash
log level:
le (error)
lw (warning)
li (info)
lt (trace)

d (display debug)

s (display time stamp)

log message:
me
mw
mi
mt
p
```

## Hints

- Use Qt to read the environment variables and modify the application properties accordingly
- Add a flag to `camitk-imp` and `camitk-config` arguments

## Acceptance tests

- [ ] there are more tests of the testlogger class that shows it work
- [ ] the `Log System` document is updated accordingly

Edited Jun 12, 2018 by Emmanuel Promayon

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