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ShellDetect: fall back to filetype if no hashbang

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Some files lack a hashbang line but still have an unambiguous filetype.
For example, the file `.zshrc` has the filetype `zsh`.

Augment ale#handlers#sh#GetShellType to fall back to the filetype if
no hashbang line can be found.
This commit is contained in:
Eddie Lebow 2019-11-23 00:06:03 -05:00
parent b91d82bfaa
commit 1997a8f7e2
No known key found for this signature in database
GPG key ID: 21A09CFD989FD546
2 changed files with 23 additions and 6 deletions
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19
autoload/ale/handlers/sh.vim
View file

@ -4,17 +4,24 @@
function! ale#handlers#sh#GetShellType(buffer) abort
let l:bang_line = get(getbufline(a:buffer, 1), 0, '')
let l:command = ''
" Take the shell executable from the hashbang, if we can.
if l:bang_line[:1] is# '#!'
" Remove options like -e, etc.
let l:command = substitute(l:bang_line, ' --\?[a-zA-Z0-9]\+', '', 'g')
for l:possible_shell in ['bash', 'dash', 'ash', 'tcsh', 'csh', 'zsh', 'ksh', 'sh']
if l:command =~# l:possible_shell . '\s*$'
return l:possible_shell
endif
endfor
endif
" If we couldn't find a hashbang, try the filetype
if l:command is# ''
let l:command = &filetype
endif
for l:possible_shell in ['bash', 'dash', 'ash', 'tcsh', 'csh', 'zsh', 'ksh', 'sh']
if l:command =~# l:possible_shell . '\s*$'
return l:possible_shell
endif
endfor
return ''
endfunction

10
test/test_shell_detection.vader
View file

@ -98,6 +98,16 @@ Execute(The ksh dialect should be used for shellcheck if b:is_kornshell is 1):
AssertEqual 'ksh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
Execute(The filetype should be used as the default shell type when there is no hashbang line):
set filetype=zsh
AssertEqual 'zsh', ale#handlers#sh#GetShellType(bufnr(''))
set filetype=tcsh
AssertEqual 'tcsh', ale#handlers#sh#GetShellType(bufnr(''))
set filetype=python
AssertEqual '', ale#handlers#sh#GetShellType(bufnr(''))
Given(A file with /bin/ash):
#!/bin/ash