From a6a6aeab76bef135d9f76534efa5ee7391c4ed2a Mon Sep 17 00:00:00 2001
From: Adam Stankiewicz <sheerun@sher.pl>
Date: Thu, 24 Sep 2020 22:52:50 +0200
Subject: Improve django filetype detection, closes #560

---
 scripts/build | 38 ++++++++++++++++----------------------
 1 file changed, 16 insertions(+), 22 deletions(-)

(limited to 'scripts')

diff --git a/scripts/build b/scripts/build
index 482ffcf6..3c89b6f1 100755
--- a/scripts/build
+++ b/scripts/build
@@ -126,10 +126,6 @@ def transform_patterns(heuristics)
   patterns_mapping = Hash[patterns.zip(patterns_to_vim_patterns(patterns))]
   each_hash(heuristics) do |h|
     if h.has_key?("pattern")
-      if h["pattern"].include?("#import")
-        puts h["pattern"]
-        puts patterns_mapping.fetch(h["pattern"])
-      end
       h["pattern"] = patterns_mapping.fetch(h["pattern"])
     end
   end
@@ -326,10 +322,20 @@ def rule_to_code(rule)
     EOS
   end
 
-  if (rule.keys - ["filetype", "override", "set", "extensions", "fallback"]).size > 0
-    raise "Unknown rule: #{JSON.generate(rule)}"
+  if rule.has_key?("filetype")
+    if rule.has_key?("fallback")
+      return <<~EOS
+        set ft=#{rule["filetype"]} | au! BufWritePost <buffer> ++once call polyglot#Detect#{camelize(rule["extensions"].first)}Filetype()
+        return
+      EOS
+    end
+
+    return <<~EOS
+      set ft=#{rule["filetype"]} | return
+      #{indent(rule_to_code(except(rule, "filetype")), 0)}
+    EOS
   end
-  
+
   if rule.has_key?("override")
     variable = "g:filetype_#{rule["extensions"].first}"
     return <<~EOS
@@ -339,22 +345,10 @@ def rule_to_code(rule)
     EOS
   end
 
-  if rule.has_key?("filetype")
-    return "set ft=#{rule["filetype"]} | return"
-  end
-
-  if rule.has_key?("filetype")
-    if rule.has_key?("fallback")
-      return "set ft=#{rule["filetype"]} | return"
-    else
-      return "setf FALLBACK #{rule["filetype"]} | return"
-    end
-  end
-
-  if rule.has_key?("extensions")
-    return ""
+  if (rule.keys - ["extensions"]).size > 0
+    raise "Unknown rule: #{JSON.generate(rule)}"
   end
-
+  
   return ""
 end
 
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