LuaLines

Small line parser written in pure Lua

##Overview I needed fast small parser for my school project (parsing .gpx file with thousands lines). I needed to parse whole block with patterns between them, which I was looking for. For example:

<wpt lat="47.9576349" lon="16.787799">
  <name>Jois</name>
  <extensions>
    <ogr:osm_id>538174</ogr:osm_id>
    <ogr:other_tags>&quot;traffic_sign&quot;=&gt;&quot;city_limit&quot;</ogr:other_tags>
  </extensions>
</wpt>
<wpt lat="48.1896356" lon="17.2557963">
    <ogr:osm_id>702570</ogr:osm_id>
    ....
</wpt>
<rte lat=...
...
</rte>

And from this file I needed all with wpt tags and contains traffic_sign. Sure you can do it with some regex, but to me, this is more handy and easier to work with. I added some easy parsing with single or more patterns and going to add more functionality to LuaLines. Just scroll down and check for its options.

##Usage

Usage: [-hsvn] [-m num] [-f file] <input file>

	-h 	    	help
	-s	    	parse lines based on single pattern match
	-m [num]	parse lines based on more patterns match
	-v	    	don't print parsed output
	-n	    	parse lines based on more patterns insi

-s - used to find lines which contains our typed pattern
-m [num] - used to find lines which contains our typed patterns (num could be 1, so will be same as -s)
-n - follow instructions, first type starting and ending pattern, then which patterns find between them. If you want to parse whole paragraph, then type
```
How many patterns to find: 0
```

##Installation Make:

git clone https://github.com/robooo/LuaLines.git
cd LuaLines/
make

Or with luarocks:

luarocks install lualines

##Examples ###single parse

lualines -s -f /path/to/save /file/path/to/parse

###multi parse

lualines -m 3 -f /path/to/save /file/path/to/parse

###inner parse Let's work this file, its path is /file/path/to/parse.txt:

<tag1>This is what I want</tag1>
<tag1>This is not what I want</tag1>
<tag2>Bad too<tag2>
<bad_tag>This is what I want2</tag1>

and we want get 1. and 4. line

> lualines -n -f /path/to/save.txt /file/path/to/parse.txt
> First tag: <tag1>
> Last tag: </tag1>
> How many patterns to find: 1
> 1.pattern: is what
> OUTPUT:
> <tag1>This is what I want</tag1>
> 1 lines parsed, save to file? y/n
> y
> Continue? y/n
> y
> First tag: <bad_tag>
> Last tag: </tag1>
> How many patterns to find: 1
> 1.pattern: is what
> OUTPUT:
> <bad_tag>This is what I want2</h1>
> 1 lines parsed, save to file? y/n
> y
> Continue? y/n
> n

Now when we open save.txt file, we will see our parsed lines.

###TODO

Better file manipulation

robooo/lualines

LuaLines