Add rustfmt config and travis integration.

Author: valentinewallace

.travis.yml

@@ -11,6 +11,9 @@ before_install:
   - sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev libelf-dev libdw-dev cmake gcc binutils-dev libiberty-dev
 
 script:
+     # Check formatting.
+     - if [ "$(rustup show | grep default | grep stable)" != "" ]; then rustup component add rustfmt && cargo fmt --all -- --check; fi
+     - if [ "$(rustup show | grep default | grep 1.34.2)" != "" ]; then rustup component add rustfmt && cd fuzz && cargo fmt --all -- --check && cd ../; fi
      # Build workspaces with Rust stable, beta, and 1.34.0
      - if [ "$(rustup show | grep default | grep 1.22.0)" == "" ]; then RUSTFLAGS="-C link-dead-code" cargo build --verbose; fi
      # Build lightning workspace with Rust 1.22.0

fuzz/rustfmt.toml

@@ -0,0 +1,16 @@
+# Non-defaults
+hard_tabs = true # use tab characters for indentation, spaces for alignment
+use_field_init_shorthand = true
+max_width = 5000 # Initially set this to a big number to split the diff of the formatter into multiple commits.
+
+# Default
+edition = "2015"
+force_explicit_abi = true
+merge_derives = true
+newline_style = "Auto" # Unix or Windows line endings
+remove_nested_parens = true
+reorder_imports = true
+reorder_modules = true
+tab_spaces = 4
+use_small_heuristics = "Default"
+use_try_shorthand = false

rustfmt.toml

@@ -0,0 +1,17 @@
+# Non-defaults
+hard_tabs = true # use tab characters for indentation, spaces for alignment
+use_field_init_shorthand = true
+max_width = 5000 # Initially set this to a big number to split the diff of the formatter into multiple commits.
+
+# Default
+edition = "2015"
+fn_args_layout = "Tall"
+force_explicit_abi = true
+merge_derives = true
+newline_style = "Auto" # Unix or Windows line endings
+remove_nested_parens = true
+reorder_imports = true
+reorder_modules = true
+tab_spaces = 4
+use_small_heuristics = "Default"
+use_try_shorthand = false