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[](https://travis-ci.org/bloodstalker/cgrep)
[](https://lgtm.com/projects/g/bloodstalker/cgrep/context:cpp)
# cgrep
`grep` for C/C++ source files.<br/>
cgrep uses libtooling, the latest tested version of LLVM is trunk 340121.<br/>
Should be more or less fine for other C-family languages as well but I haven't tested for those since I don't use those. Let me know if you run into trouble using cgrep on those.<br/>
## Bulding
Assuming you have the llvm/clang libraries(the build file will read your llvm options using `llvm-config` so make sure it's in path), just run:<br/>
```bash
git clone https://github.com/bloodstalker/cgrep
git submodule init
git submodule update
make
```
`cgrep` supports LLVM 6,8, and for 9 the latest tested trunk version currently is:355787.<br/>
The makefile assumes clang is called `clang` and llvm-config is called `llvm-config`. On some distros, the names might not be the same. In those cases use `CXX` and `LLVM_CONF` to pass the values to the makefile.<br/>
## Usage
A simple usage example:<br/>
```bash
cgrep -A 1 -B 1 --func --var --regex n[aA]m ./cgrep.cpp
```
Pleade do note that the regex will pass through both C++ and the regex engine, so if you would want to escape `\`, the regex you pass as the commandline arg would be `\\\\` instead of the normal `\\`.<br/>
In order for cgrep to work, you need to have a compilation database, tools like cmake can generate one for you.<br/>
If your build tool doesn't do that, you can just use [bear](https://github.com/rizsotto/Bear).<br/>
You can also skip the compilation database alltogether passing cgrep `--` after the input file name.<br/>
## Options
Here's an option list though it might not be necessarily up-to-date.<br/>
For an up-to-date list, you can run `crep --help`.<br/>
```bash
-A=<int> - same as grep, how many lines after the matched line to print
-B=<int> - same as grep, howm many lines before the matched line to print
-all - turns on all switches other than nameddecl
-awk - outputs location in a gawk freidnly format
-call - match function calls only
-class - match class declrations only
-cxxcall - match member function calls only
-declrefexpr - matches declrefexpr
-dir=<string> - recursively goes through all the files and directories. assumes compilation databases are present for all source files.
-func - match functions only
-header - match headers in header inclusions
-macro - match macro definitions
-mainfile - mathc identifiers in the main file only
-memfunc - match member functions only
-memvar - match member variables only
-nameddecl - matches all named declrations
-regex=<string> - the regex to match against
-struct - match structures only
-syshdr - match identifiers in system header as well
-union - match unions only
-var - match variables only
```
`cgrep` is a clang tool, so it will accecpt all valid clang commandline options.<br/>
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