Select language based on a file's first content line in addition to its path

crates/zed/src/languages/javascript/config.toml

@@ -1,5 +1,6 @@
 name = "JavaScript"
 path_suffixes = ["js", "jsx", "mjs"]
+first_line_pattern = '^#!.*\bnode\b'
 line_comment = "// "
 autoclose_before = ";:.,=}])>"
 brackets = [

crates/zed/src/languages/python/config.toml

@@ -1,5 +1,6 @@
 name = "Python"
 path_suffixes = ["py", "pyi"]
+first_line_pattern = '^#!.*\bpython[0-9.]*\b'
 line_comment = "# "
 autoclose_before = ";:.,=}])>"
 brackets = [

crates/zed/src/languages/ruby/config.toml

@@ -1,5 +1,6 @@
 name = "Ruby"
 path_suffixes = ["rb", "Gemfile"]
+first_line_pattern = '^#!.*\bruby\b'
 line_comment = "# "
 autoclose_before = ";:.,=}])>"
 brackets = [