Add user control for the maximum number of files to analyze

Author: cixtor

README.md

@@ -16,6 +16,8 @@ This linter plugin for [SublimeLinter](https://github.com/SublimeLinter) provide
 
 In order for `golangci-lint` to be executed by SublimeLinter, you must ensure that its path is available to SublimeLinter. Before going any further, please read and follow the steps in [Finding a linter executable](http://sublimelinter.readthedocs.org/en/latest/troubleshooting.html#finding-a-linter-executable) through “Validating your PATH” in the documentation. Once you have installed `golangci-lint`, you can proceed to install the plugin if it is not yet installed.
 
+Due to performance issues in golangci-lint, the linter will not attempt to lint more than one-hundred (100) files considering a delay of 100ms and `lint_mode` equal to “background”. If the user increases the delay, the tool will have more time to scan more files and analyze them. If your project contains more than 300 files, you’ll have to set a delay of 0.3s or more in SublimeLinter settings.
+
 **Note:** The linter creates a temporary directory to allow SublimeLinter to scan changes in the code that are still in the buffer _(aka. not saved yet)_. If the SublimeText sidebar is visible, you will notice _—for a split of a second—_ that a folder named `.golangcilint-*` appears and disappears. Make sure to add this folder to your `.gitignore` file, and also the “folder_exclude_patterns” in SublimeText’s preferences:
 
 ```

linter.py

@@ -8,11 +8,6 @@
 
 logger = logging.getLogger('SublimeLinter.plugin.golangcilint')
 
-# Due to performance issues in golangci-lint, the linter will not attempt to
-# lint a maximum of one-hundred (100) files considering a delay of 100ms and
-# lint_mode equal to “background”. If the user increases the delay, the tool
-# will have more time to scan more files and analyze them.
-MAX_FILES = 100
 
 class Golangcilint(NodeLinter):
     cmd = "golangci-lint run --fast --out-format json"
@@ -99,9 +94,15 @@ def _foreground_lint(self, cmd):
     def _background_lint(self, cmd, code):
         folder = os.path.dirname(self.filename)
         things = [f for f in os.listdir(folder) if f.endswith(".go")]
+        maxsee = settings.get("delay") * 1000
         nfiles = len(things)
 
-        if nfiles > MAX_FILES:
+        if nfiles > maxsee:
+            # Due to performance issues in golangci-lint, the linter will not
+            # attempt to lint more than one-hundred (100) files considering a
+            # delay of 100ms and lint_mode equal to “background”. If the user
+            # increases the delay, the tool will have more time to scan more
+            # files and analyze them.
             logger.warning("too many Go (golang) files ({})".format(nfiles))
             self.notify_failure()
             return ""