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bugfix: c.vim: Pull build directory from compilation database

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The LLVM compiler database JSON already includes a directory where the
build was performed:
https://clang.llvm.org/docs/JSONCompilationDatabase.html

Prefer this directory for fixing relative paths in compiler include
arguments in ale#c#ParseCFlags.

Without this change, users cannot create a symlink to their compilation
database as suggested in the LLVM tooling setup instructions:
https://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
This commit is contained in:
David VandeBunte 2019-01-06 20:17:32 -06:00
parent f23811770a
commit 4f72023e16
2 changed files with 7 additions and 8 deletions
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9
autoload/ale/c.vim
View File

@ -200,14 +200,14 @@ function! s:GetLookupFromCompileCommandsFile(compile_commands_file) abort
return l:empty
endfunction
function! ale#c#ParseCompileCommandsFlags(buffer, dir, file_lookup, dir_lookup) abort
function! ale#c#ParseCompileCommandsFlags(buffer, file_lookup, dir_lookup) abort
" Search for an exact file match first.
let l:basename = tolower(expand('#' . a:buffer . ':t'))
let l:file_list = get(a:file_lookup, l:basename, [])
for l:item in l:file_list
if bufnr(l:item.file) is a:buffer
return ale#c#ParseCFlags(a:dir, l:item.command)
return ale#c#ParseCFlags(l:item.directory, l:item.command)
endif
endfor
@ -219,7 +219,7 @@ function! ale#c#ParseCompileCommandsFlags(buffer, dir, file_lookup, dir_lookup)
for l:item in l:dir_list
if ale#path#Simplify(fnamemodify(l:item.file, ':h')) is? l:dir
return ale#c#ParseCFlags(a:dir, l:item.command)
return ale#c#ParseCFlags(l:item.directory, l:item.command)
endif
endfor
@ -227,12 +227,11 @@ function! ale#c#ParseCompileCommandsFlags(buffer, dir, file_lookup, dir_lookup)
endfunction
function! ale#c#FlagsFromCompileCommands(buffer, compile_commands_file) abort
let l:dir = ale#path#Dirname(a:compile_commands_file)
let l:lookups = s:GetLookupFromCompileCommandsFile(a:compile_commands_file)
let l:file_lookup = l:lookups[0]
let l:dir_lookup = l:lookups[1]
return ale#c#ParseCompileCommandsFlags(a:buffer, l:dir, l:file_lookup, l:dir_lookup)
return ale#c#ParseCompileCommandsFlags(a:buffer, l:file_lookup, l:dir_lookup)
endfunction
function! ale#c#GetCFlags(buffer, output) abort

6
test/test_c_flag_parsing.vader
View File

@ -161,14 +161,14 @@ Execute(FlagsFromCompileCommands should tolerate empty values):
AssertEqual '', ale#c#FlagsFromCompileCommands(bufnr(''), '')
Execute(ParseCompileCommandsFlags should tolerate empty values):
AssertEqual '', ale#c#ParseCompileCommandsFlags(bufnr(''), '', {}, {})
AssertEqual '', ale#c#ParseCompileCommandsFlags(bufnr(''), {}, {})
Execute(ParseCompileCommandsFlags should parse some basic flags):
noautocmd execute 'file! ' . fnameescape(ale#path#Simplify('/foo/bar/xmms2-mpris/src/xmms2-mpris.c'))
AssertEqual
\ '-I' . ale#path#Simplify('/usr/include/xmms2'),
\ ale#c#ParseCompileCommandsFlags(bufnr(''), ale#path#Simplify('/foo/bar/xmms2-mpris'), { "xmms2-mpris.c": [
\ ale#c#ParseCompileCommandsFlags(bufnr(''), { "xmms2-mpris.c": [
\ {
\ 'directory': ale#path#Simplify('/foo/bar/xmms2-mpris'),
\ 'command': '/usr/bin/cc -I' . ale#path#Simplify('/usr/include/xmms2')
@ -183,7 +183,7 @@ Execute(ParseCompileCommandsFlags should fall back to files in the same director
AssertEqual
\ '-I' . ale#path#Simplify('/usr/include/xmms2'),
\ ale#c#ParseCompileCommandsFlags(bufnr(''), ale#path#Simplify('/foo/bar/xmms2-mpris'), {}, { "src": [
\ ale#c#ParseCompileCommandsFlags(bufnr(''), {}, { "src": [
\ {
\ 'directory': ale#path#Simplify('/foo/bar/xmms2-mpris'),
\ 'command': '/usr/bin/cc -I' . ale#path#Simplify('/usr/include/xmms2')