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use regex::Regex;
use std::cell::Cell;
use std::default::Default;
use std::fs::File;
use std::io::{Error, ErrorKind, Read};
use std::path::{Path, PathBuf};
use std::{env, fs};
use config::config_type::ConfigType;
pub use config::file_lines::{FileLines, FileName, Range};
pub use config::lists::*;
pub use config::options::*;
#[macro_use]
pub mod config_type;
#[macro_use]
pub mod options;
pub mod file_lines;
pub mod license;
pub mod lists;
create_config! {
max_width: usize, 100, true, "Maximum width of each line";
hard_tabs: bool, false, true, "Use tab characters for indentation, spaces for alignment";
tab_spaces: usize, 4, true, "Number of spaces per tab";
newline_style: NewlineStyle, NewlineStyle::Auto, true, "Unix or Windows line endings";
use_small_heuristics: Heuristics, Heuristics::Default, true, "Whether to use different \
formatting for items and expressions if they satisfy a heuristic notion of 'small'";
indent_style: IndentStyle, IndentStyle::Block, false, "How do we indent expressions or items";
wrap_comments: bool, false, false, "Break comments to fit on the line";
comment_width: usize, 80, false,
"Maximum length of comments. No effect unless wrap_comments = true";
normalize_comments: bool, false, false, "Convert /* */ comments to // comments where possible";
license_template_path: String, String::default(), false,
"Beginning of file must match license template";
format_strings: bool, false, false, "Format string literals where necessary";
format_macro_matchers: bool, false, false,
"Format the metavariable matching patterns in macros";
format_macro_bodies: bool, true, false, "Format the bodies of macros";
empty_item_single_line: bool, true, false,
"Put empty-body functions and impls on a single line";
struct_lit_single_line: bool, true, false,
"Put small struct literals on a single line";
fn_single_line: bool, false, false, "Put single-expression functions on a single line";
where_single_line: bool, false, false, "Force where clauses to be on a single line";
imports_indent: IndentStyle, IndentStyle::Block, false, "Indent of imports";
imports_layout: ListTactic, ListTactic::Mixed, false, "Item layout inside a import block";
merge_imports: bool, false, false, "Merge imports";
reorder_imports: bool, true, true, "Reorder import and extern crate statements alphabetically";
reorder_modules: bool, true, true, "Reorder module statements alphabetically in group";
reorder_impl_items: bool, false, false, "Reorder impl items";
type_punctuation_density: TypeDensity, TypeDensity::Wide, false,
"Determines if '+' or '=' are wrapped in spaces in the punctuation of types";
space_before_colon: bool, false, false, "Leave a space before the colon";
space_after_colon: bool, true, false, "Leave a space after the colon";
spaces_around_ranges: bool, false, false, "Put spaces around the .. and ..= range operators";
binop_separator: SeparatorPlace, SeparatorPlace::Front, false,
"Where to put a binary operator when a binary expression goes multiline";
remove_nested_parens: bool, true, true, "Remove nested parens";
combine_control_expr: bool, true, false, "Combine control expressions with function calls";
struct_field_align_threshold: usize, 0, false, "Align struct fields if their diffs fits within \
threshold";
match_arm_blocks: bool, true, false, "Wrap the body of arms in blocks when it does not fit on \
the same line with the pattern of arms";
force_multiline_blocks: bool, false, false,
"Force multiline closure bodies and match arms to be wrapped in a block";
fn_args_density: Density, Density::Tall, false, "Argument density in functions";
brace_style: BraceStyle, BraceStyle::SameLineWhere, false, "Brace style for items";
control_brace_style: ControlBraceStyle, ControlBraceStyle::AlwaysSameLine, false,
"Brace style for control flow constructs";
trailing_semicolon: bool, true, false,
"Add trailing semicolon after break, continue and return";
trailing_comma: SeparatorTactic, SeparatorTactic::Vertical, false,
"How to handle trailing commas for lists";
match_block_trailing_comma: bool, false, false,
"Put a trailing comma after a block based match arm (non-block arms are not affected)";
blank_lines_upper_bound: usize, 1, false,
"Maximum number of blank lines which can be put between items";
blank_lines_lower_bound: usize, 0, false,
"Minimum number of blank lines which must be put between items";
edition: Edition, Edition::Edition2015, false, "The edition of the parser (RFC 2052)";
merge_derives: bool, true, true, "Merge multiple `#[derive(...)]` into a single one";
use_try_shorthand: bool, false, true, "Replace uses of the try! macro by the ? shorthand";
use_field_init_shorthand: bool, false, true, "Use field initialization shorthand if possible";
force_explicit_abi: bool, true, true, "Always print the abi for extern items";
condense_wildcard_suffixes: bool, false, false, "Replace strings of _ wildcards by a single .. \
in tuple patterns";
color: Color, Color::Auto, false,
"What Color option to use when none is supplied: Always, Never, Auto";
required_version: String, env!("CARGO_PKG_VERSION").to_owned(), false,
"Require a specific version of rustfmt";
unstable_features: bool, false, false,
"Enables unstable features. Only available on nightly channel";
disable_all_formatting: bool, false, false, "Don't reformat anything";
skip_children: bool, false, false, "Don't reformat out of line modules";
hide_parse_errors: bool, false, false, "Hide errors from the parser";
error_on_line_overflow: bool, false, false, "Error if unable to get all lines within max_width";
error_on_unformatted: bool, false, false,
"Error if unable to get comments or string literals within max_width, \
or they are left with trailing whitespaces";
report_todo: ReportTactic, ReportTactic::Never, false,
"Report all, none or unnumbered occurrences of TODO in source file comments";
report_fixme: ReportTactic, ReportTactic::Never, false,
"Report all, none or unnumbered occurrences of FIXME in source file comments";
ignore: IgnoreList, IgnoreList::default(), false,
"Skip formatting the specified files and directories";
verbose: Verbosity, Verbosity::Normal, false, "How much to information to emit to the user";
file_lines: FileLines, FileLines::all(), false,
"Lines to format; this is not supported in rustfmt.toml, and can only be specified \
via the --file-lines option";
width_heuristics: WidthHeuristics, WidthHeuristics::scaled(100), false,
"'small' heuristic values";
emit_mode: EmitMode, EmitMode::Files, false,
"What emit Mode to use when none is supplied";
make_backup: bool, false, false, "Backup changed files";
}
pub fn load_config<O: CliOptions>(
file_path: Option<&Path>,
options: Option<O>,
) -> Result<(Config, Option<PathBuf>), Error> {
let over_ride = match options {
Some(ref opts) => config_path(opts)?,
None => None,
};
let result = if let Some(over_ride) = over_ride {
Config::from_toml_path(over_ride.as_ref()).map(|p| (p, Some(over_ride.to_owned())))
} else if let Some(file_path) = file_path {
Config::from_resolved_toml_path(file_path)
} else {
Ok((Config::default(), None))
};
result.map(|(mut c, p)| {
if let Some(options) = options {
options.apply_to(&mut c);
}
(c, p)
})
}
fn get_toml_path(dir: &Path) -> Result<Option<PathBuf>, Error> {
const CONFIG_FILE_NAMES: [&str; 2] = [".rustfmt.toml", "rustfmt.toml"];
for config_file_name in &CONFIG_FILE_NAMES {
let config_file = dir.join(config_file_name);
match fs::metadata(&config_file) {
Ok(ref md) if md.is_file() => return Ok(Some(config_file)),
Err(e) => {
if e.kind() != ErrorKind::NotFound {
return Err(e);
}
}
_ => {}
}
}
Ok(None)
}
fn config_path(options: &CliOptions) -> Result<Option<PathBuf>, Error> {
let config_path_not_found = |path: &str| -> Result<Option<PathBuf>, Error> {
Err(Error::new(
ErrorKind::NotFound,
format!(
"Error: unable to find a config file for the given path: `{}`",
path
),
))
};
match options.config_path() {
Some(path) if !path.exists() => config_path_not_found(path.to_str().unwrap()),
Some(path) if path.is_dir() => {
let config_file_path = get_toml_path(path)?;
if config_file_path.is_some() {
Ok(config_file_path)
} else {
config_path_not_found(path.to_str().unwrap())
}
}
path => Ok(path.map(|p| p.to_owned())),
}
}
#[cfg(test)]
mod test {
use super::*;
use std::str;
#[allow(dead_code)]
mod mock {
use super::super::*;
create_config! {
max_width: usize, 100, true, "Maximum width of each line";
use_small_heuristics: Heuristics, Heuristics::Default, true,
"Whether to use different formatting for items and \
expressions if they satisfy a heuristic notion of 'small'.";
license_template_path: String, String::default(), false,
"Beginning of file must match license template";
required_version: String, env!("CARGO_PKG_VERSION").to_owned(), false,
"Require a specific version of rustfmt.";
ignore: IgnoreList, IgnoreList::default(), false,
"Skip formatting the specified files and directories.";
verbose: Verbosity, Verbosity::Normal, false,
"How much to information to emit to the user";
file_lines: FileLines, FileLines::all(), false,
"Lines to format; this is not supported in rustfmt.toml, and can only be specified \
via the --file-lines option";
width_heuristics: WidthHeuristics, WidthHeuristics::scaled(100), false,
"'small' heuristic values";
stable_option: bool, false, true, "A stable option";
unstable_option: bool, false, false, "An unstable option";
}
}
#[test]
fn test_config_set() {
let mut config = Config::default();
config.set().verbose(Verbosity::Quiet);
assert_eq!(config.verbose(), Verbosity::Quiet);
config.set().verbose(Verbosity::Normal);
assert_eq!(config.verbose(), Verbosity::Normal);
}
#[test]
fn test_config_used_to_toml() {
let config = Config::default();
let merge_derives = config.merge_derives();
let skip_children = config.skip_children();
let used_options = config.used_options();
let toml = used_options.to_toml().unwrap();
assert_eq!(
toml,
format!(
"merge_derives = {}\nskip_children = {}\n",
merge_derives, skip_children,
)
);
}
#[test]
fn test_was_set() {
use std::path::Path;
let config = Config::from_toml("hard_tabs = true", Path::new("")).unwrap();
assert_eq!(config.was_set().hard_tabs(), true);
assert_eq!(config.was_set().verbose(), false);
}
#[test]
fn test_print_docs_exclude_unstable() {
use self::mock::Config;
let mut output = Vec::new();
Config::print_docs(&mut output, false);
let s = str::from_utf8(&output).unwrap();
assert_eq!(s.contains("stable_option"), true);
assert_eq!(s.contains("unstable_option"), false);
assert_eq!(s.contains("(unstable)"), false);
}
#[test]
fn test_print_docs_include_unstable() {
use self::mock::Config;
let mut output = Vec::new();
Config::print_docs(&mut output, true);
let s = str::from_utf8(&output).unwrap();
assert_eq!(s.contains("stable_option"), true);
assert_eq!(s.contains("unstable_option"), true);
assert_eq!(s.contains("(unstable)"), true);
}
}