Re-analyze header file

[csordasmarton]

Let's suppose that I have the following header and source files:
f.h:

#ifndef F_H
#define F_H
void foo() { sizeof(42); }
#endif

a.cpp:

#include "f.h"
void bar() { foo(); }

b.cpp:

#include "f.h"
void bar() { foo(); }

c.cpp:

void bar() { sizeof(43); }

I also have the following simple Makefile:

all: a b c

a: a.cpp
	g++ -c a.cpp
b: b.cpp
	g++ -c b.cpp
c: c.cpp
	g++ -c c.cpp

Let's suppose that I setup the CodeChecker VSCode plugin and I want to modify my header file (f.h). In this case I have to re-analyze all the source files which depend on this header file (a.cpp and b.cpp but not c.cpp).

For now if I modify a header file it will call the analysis and set the --file option to this header file which will not do what we want.

To figure out these source files which need to be reanalyzed we can use the tu_collector tool from CodeChecker: tu_collector -l ~/myproject/.codechecker/compile_commands.json -d --filter ~/myproject/f.h

The result will be the list of source files:

~/myproject/a.cpp
~/myproject/b.cpp

[csordasmarton]

Maybe it would be better to solve this problem inside CodeCheker rather than in the plugin. So if someone provides a header file to the analyze command (CodeChecker analyze --file x.h ... ) we will use the tu_collector under the hood the figure out which source files are depends on the given header file and we will analyze these source files.