This is how my source code directory looks like.
learner@centos:~/lab$ tree . +-- cscope.out +-- src ¦ +-- bar ¦ ¦ +-- bar.c ¦ ¦ +-- baz ¦ ¦ +-- baz.c ¦ +-- foo.c ¦ +-- qux ¦ +-- qux.c +-- work I want to create cross-reference for source code files in an arbitrary location on the filesystem (~/lab/src/bar in this example) and write the cross-reference to any arbitrary location (~/lab/work/cscope.out) in this case.
Nothing apart from ~/lab/src/bar should be included in the cross-reference.
The following command, of course, did not work. It includes ~/lab/src/*.c and ~/lab/src/qux/*.c also in the cross-reference
learner@centos:~/lab$ cscope -b -R -f ~/lab/work/cscope.out learner@centos:~/lab$ grep "@.*src" ~/lab/work/cscope.out @src/bar/bar.c @src/bar/baz/baz.c @src/foo.c @src/qux/qux.c The following command also suffers from the same problem because searching the current directory is automatically implied by default.
learner@centos:~/lab$ rm ~/lab/work/cscope.out learner@centos:~/lab$ cscope -b -R -f ~/lab/work/cscope.out -s ~/lab/src/bar learner@centos:~/lab$ grep "@.*src" ~/lab/work/cscope.out @/home/learner/lab/src/bar/bar.c @/home/learner/lab/src/bar/baz/baz.c @src/bar/bar.c @src/bar/baz/baz.c @src/foo.c @src/qux/qux.c The following command does not work.
learner@centos:~/lab$ rm ~/lab/work/* learner@centos:~/lab$ cscope -b -R -f ~/lab/work/cscope.out ~/lab/src/bar Cannot open file /home/learner/lab/src/bar With ctags, a similar command works fine.
learner@centos:~/lab$ ctags -R -f ~/lab/work/tags ~/lab/src/bar learner@centos:~/lab$ grep src ~/lab/work/tags bar /home/learner/lab/src/bar/bar.c /^void bar()$/;" f baz /home/learner/lab/src/bar/baz/baz.c /^void baz()$/;" f main /home/learner/lab/src/bar/bar.c /^int main()$/;" f main /home/learner/lab/src/bar/baz/baz.c /^int main()$/;" f How can I do the same thing with cscope?
The only workaround I have found so far is to first change into an empty directory and then run the cscope command with -s ~/lab/src/bar. This would search the specified directory along with the current directory but since the current directory is empty, only files from the specified directory would be included in the cross-reference.
learner@centos:~/lab$ rm ~/lab/work/* learner@centos:~/lab$ cd ~/lab/work learner@centos:~/lab/work$ cscope -b -R -f ~/lab/work/cscope.out -s ~/lab/src/bar learner@centos:~/lab/work$ grep "@.*src" ~/lab/work/cscope.out @/home/learner/lab/src/bar/bar.c @/home/learner/lab/src/bar/baz/baz.c Is there another solution that won't require me to change the current directory to an empty directory?
Note: The solution should work for a general use-case.
- There may be hundreds of other files and directories that must not be included in the cross-reference (like
foo.candquxin the above example). - There may be files with other extension names such as
.h,.l,.y, etc. that need to be cross-referenced.
1 Answers
Answers 1
the trick here is knowing the cscope will also accept a list a sources files rather than searching on its own. So passing the list of files is the problem to solve.
find to the rescue.
cscope -b -f <path_to_refdir>/cscope.out `find <path_of_desired_src_tree> -name *.[chly]` in your case
cscope -b -f work/cscope.out `find src/bar -name *.[chly]` 
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