This fixes issue #936 by linting the whole package

ale_linters/go/staticcheck.vim

@@ -1,10 +1,32 @@
 " Author: Ben Reedy <https://github.com/breed808>
 " Description: staticcheck for Go files
 
+call ale#Set('go_staticcheck_options', '')
+call ale#Set('go_staticcheck_lint_package', 0)
+
+function! ale_linters#go#staticcheck#GetCommand(buffer) abort
+    let l:filename = expand('#' . a:buffer . ':t')
+    let l:options = ale#Var(a:buffer, 'go_staticcheck_options')
+    let l:lint_package = ale#Var(a:buffer, 'go_staticcheck_lint_package')
+
+    " BufferCdString is used so that we can be sure the paths output from
+    " staticcheck can be calculated to absolute paths in the Handler
+    if l:lint_package
+        return ale#path#BufferCdString(a:buffer)
+        \   . 'staticcheck'
+        \   . (!empty(l:options) ? ' ' . l:options : '') . ' .'
+    endif
+
+    return ale#path#BufferCdString(a:buffer)
+    \   . 'staticcheck'
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' ' . ale#Escape(l:filename)
+endfunction
+
 call ale#linter#Define('go', {
 \   'name': 'staticcheck',
 \   'executable': 'staticcheck',
-\   'command': 'staticcheck %s',
+\   'command_callback': 'ale_linters#go#staticcheck#GetCommand',
 \   'callback': 'ale#handlers#unix#HandleAsWarning',
 \   'output_stream': 'both',
 \   'lint_file': 1,

doc/ale-go.txt

@@ -20,6 +20,7 @@ the benefit of running a number of linters, more than ALE would by default,
 while ensuring it doesn't run any linters known to be slow or resource
 intensive.
 
+
 ===============================================================================
 gobuild                                                        *ale-go-gobuild*
 
@@ -42,6 +43,7 @@ g:ale_go_gofmt_options                                 *g:ale_go_gofmt_options*
 
   This variable can be set to pass additional options to the gofmt fixer.
 
+
 ===============================================================================
 gometalinter                                              *ale-go-gometalinter*
 
@@ -71,5 +73,35 @@ g:ale_go_gometalinter_options                   *g:ale_go_gometalinter_options*
   number of linters known to be slow or consume a lot of resources.
 
 
+g:ale_go_gometalinter_package                   *g:ale_go_gometalinter_package*
+                                                *b:ale_go_gometalinter_package*
+  Type: |Number|
+  Default: `0`
+
+  When set to `1`, the whole Go package will be checked instead of only the
+  current file.
+
+
+===============================================================================
+staticcheck                                                *ale-go-staticcheck*
+
+g:ale_go_staticcheck_options                     *g:ale_go_staticcheck_options*
+                                                 *b:ale_go_staticcheck_options*
+  Type: |String|
+  Default: `''`
+
+  This variable can be set to pass additional options to the staticcheck
+  linter.
+
+
+g:ale_go_staticcheck_package                     *g:ale_go_staticcheck_package*
+                                                 *b:ale_go_staticcheck_package*
+  Type: |Number|
+  Default: `0`
+
+  When set to `1`, the whole Go package will be checked instead of only the
+  current file.
+
+
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale.txt

@@ -80,6 +80,7 @@ CONTENTS                                                         *ale-contents*
       gobuild.............................|ale-go-gobuild|
       gofmt...............................|ale-go-gofmt|
       gometalinter........................|ale-go-gometalinter|
+      staticcheck.........................|ale-go-staticcheck|
     graphql...............................|ale-graphql-options|
       eslint..............................|ale-graphql-eslint|
       gqlint..............................|ale-graphql-gqlint|

test/command_callback/test_staticcheck_command_callback.vader

@@ -0,0 +1,41 @@
+Before:
+  Save b:ale_go_staticcheck_options
+  Save b:ale_go_staticcheck_lint_package
+
+  let b:ale_go_staticcheck_options = ''
+  let b:ale_go_staticcheck_lint_package = 0
+
+  runtime ale_linters/go/staticcheck.vim
+
+  call ale#test#SetDirectory('/testplugin/test/command_callback')
+  call ale#test#SetFilename('test.go')
+
+After:
+  Restore
+
+  call ale#test#RestoreDirectory()
+  call ale#linter#Reset()
+
+Execute(The staticcheck callback should return the right defaults):
+  AssertEqual
+  \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && '
+  \   . 'staticcheck '
+  \   . ale#Escape(expand('%' . ':t')),
+  \ ale_linters#go#staticcheck#GetCommand(bufnr(''))
+
+Execute(The staticcheck callback should use configured options):
+  let b:ale_go_staticcheck_options = '-test'
+
+  AssertEqual
+  \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && '
+  \   . 'staticcheck '
+  \   . '-test ' . ale#Escape(expand('%' . ':t')),
+  \ ale_linters#go#staticcheck#GetCommand(bufnr(''))
+
+Execute(The staticcheck `lint_package` option should use the correct command):
+  let b:ale_go_staticcheck_lint_package = 1
+
+  AssertEqual
+  \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && '
+  \   . 'staticcheck .',
+  \ ale_linters#go#staticcheck#GetCommand(bufnr(''))