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Created Use Config File for Command Line Options (markdown)

Chris Lu 2021-02-20 22:34:59 -08:00
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Use-Config-File-for-Command-Line-Options.md Normal file

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Direct command line can get too long:
```
weed -logdir=../mlog master -mdir=../mdir -peers=192.168.126.5:3333,192.168.126.16:3333,192.168.126.18:3333 -port=3333 -defaultReplication=001
```
You can put these command line options into a configuration file :
```
# master.conf
logdir=../mlog
mdir=../mdir
peers=192.168.126.5:3333,192.168.126.16:3333,192.168.126.18:3333
port=3333
defaultReplication=001
```
then refer it as
```
weed master -config=master.conf
```
Order of precedence of this flag, it is borrowed from https://github.com/namsral/flag with some customized for weed:
```
1. Command line options
2. Environment variables
3. Configuration file
4. Default values
```