[rust][fmt] Standard rustfmt rules for Fuchsia
Test: None
Change-Id: I7d64f81e199bff2551ec4e63dba97a93d47b6175
diff --git a/rustfmt.toml b/rustfmt.toml
index e2a078a..1b1edd9 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,61 +1,21 @@
-# This file was originally created by running the command
-# rustfmt --print-config default rustfmt.toml && sort -u rustfmt.toml -o rustfmt.toml.
-# Changes from the defaults are marked with comments.
-binop_separator = "Front"
-blank_lines_lower_bound = 0
-blank_lines_upper_bound = 1
-brace_style = "SameLineWhere"
-color = "Auto"
-combine_control_expr = true
-comment_width = 100 # Fuchsia uses 100
-condense_wildcard_suffixes = false
-control_brace_style = "AlwaysSameLine"
-disable_all_formatting = false
+# Fuchsia Format Style
+# last reviewed: Jan 29, 2019
+
+# Fuchsia uses 2018 edition only
edition = "2018"
-emit_mode = "Files"
-empty_item_single_line = true
-error_on_line_overflow = false
-error_on_unformatted = false
-fn_args_density = "Compressed" # Fuchsia prefers compressed
-fn_single_line = false
-force_explicit_abi = true
-force_multiline_blocks = false
-format_strings = false
-hard_tabs = false
-hide_parse_errors = false
-imports_indent = "Block"
-imports_layout = "Mixed"
+
+# The "Default" setting has a heuristic which splits lines too aggresively.
+# We are willing to revisit this setting in future versions of rustfmt.
+# Bugs:
+# * https://github.com/rust-lang/rustfmt/issues/3119
+# * https://github.com/rust-lang/rustfmt/issues/3120
+use_small_heuristics = "Max"
+
+# Prevent carriage returns
+newline_style = "Unix"
+
+# These files are ignored as they are mostly lists
+# which should retain their layout
ignore = [
"bin/netcfg/src/device_id.rs",
]
-indent_style = "Block"
-match_arm_blocks = true
-match_block_trailing_comma = false
-max_width = 100
-merge_derives = true
-merge_imports = false
-newline_style = "Unix"
-normalize_comments = false
-remove_nested_parens = true
-reorder_impl_items = false
-reorder_imports = true
-reorder_modules = true
-report_fixme = "Never"
-report_todo = "Never"
-skip_children = false
-space_after_colon = true
-space_before_colon = false
-spaces_around_ranges = false
-struct_field_align_threshold = 0
-struct_lit_single_line = true
-tab_spaces = 4
-trailing_comma = "Vertical"
-trailing_semicolon = true
-type_punctuation_density = "Wide"
-unstable_features = false
-use_field_init_shorthand = false
-use_small_heuristics = "Default"
-use_try_shorthand = true # Fuchsia prefers the shortcut
-where_single_line = false
-wrap_comments = false # TODO make true when rustfmt#3153 is fixed,
-# otherwise comments will violate max_width
