allow to exclude current directory from search path in dmd

[dlangBugzillaToGithub]

Timothee Cour (@timotheecour) reported this on 2015-07-20T03:06:42Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=14811

CC List

• Timothee Cour

Description

I'd like to have an option to exclude current directory from search path in dmd.
I already made a local modification to dmd to allow that (dmd -exclude_cwd_from_imports)
Would that be acceptable?

(cf forum EMAIL:exclude current directory from search path in dmd ?)

[dlangBugzillaToGithub]

timothee.cour2 commented on 2015-07-20T03:30:29Z

Reduced use case:
see https://github.com/timotheecour/dsnippet/tree/master/bug_14811

make
..//main.d(3): Error: module foo.fun1 from file fun1.d conflicts with another module fun1 from file ..//foo/fun1.d

With my modification (adds a flag -exclude_cwd_from_imports):
make with_flag
#works

[dlangBugzillaToGithub]

timothee.cour2 commented on 2015-07-20T08:06:25Z

https://github.com/D-Programming-Language/dmd/pull/4823

[dlangBugzillaToGithub]

timothee.cour2 commented on 2015-07-21T08:50:02Z

(In reply to Timothee Cour from comment #2)
> https://github.com/D-Programming-Language/dmd/pull/4823

To test it via Digger:
./digger build "master + timotheecour/dmd/exclude_cwd_from_path"
=> result/bin/dmd

[dlangBugzillaToGithub]

k.hara.pg commented on 2015-07-29T22:44:45Z

(In reply to Timothee Cour from comment #0)
> (cf forum EMAIL:exclude current directory from search path in dmd ?)

http://forum.dlang.org/thread/mailman.308.1426472794.3111.digitalmars-d-learn@puremagic.com
http://forum.dlang.org/thread/CANri+ExGss5FJXBy728rJN9YpvTKoSsk9fzcCrL4vSkuExg13A@mail.gmail.com

(In reply to Timothee Cour from comment #1)
> Reduced use case:
> see https://github.com/timotheecour/dsnippet/tree/master/bug_14811

Why you need to compile the project from the subdir foo/ ? Why you cannot do that from the project root directory?

The feature explanation does not argue the necessity of the enhancement. Please show to us the situation where the feature is necessary.

[dlangBugzillaToGithub]

timothee.cour2 commented on 2015-07-30T01:50:39Z

>> Why you cannot do that from the project root directory?

There's not always an obvious project root directory, eg when using submodules or several outside packages. 

>> The feature explanation does not argue the necessity of the enhancement. Please show to us the situation where the feature is necessary.

* I'm not the only one wanting this: http://forum.dlang.org/post/mlqdzpswbwqyrwiibqwg@forum.dlang.org

* It exists in c++
http://stackoverflow.com/questions/12353429/prevent-gcc-from-searching-the-current-dir-i-option-on-include-search-path

* if the 'natural' working directory is foo/ (current directory, where user edits files etc), wrapping every dmd invocation with 
'cd root && dmd some_command  && cd -'
is inconvenient. Eg, the error messages will be wrt to root, not wrt user's current directory