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|
use std::collections::HashSet;
use std::env;
use std::ffi::OsStr;
use std::str::FromStr;
use atty::{self, Stream};
use crate::{
clap_app,
config::{get_args_from_config_file, get_args_from_env_var},
};
use clap::ArgMatches;
use console::Term;
use bat::{
config::{
Config, HighlightedLineRanges, InputFile, LineRange, LineRanges, MappingTarget,
OrdinaryFile, OutputWrap, PagingMode, StyleComponent, StyleComponents, SyntaxMapping,
},
errors::*,
HighlightingAssets,
};
fn is_truecolor_terminal() -> bool {
env::var("COLORTERM")
.map(|colorterm| colorterm == "truecolor" || colorterm == "24bit")
.unwrap_or(false)
}
pub struct App {
pub matches: ArgMatches<'static>,
interactive_output: bool,
}
impl App {
pub fn new() -> Result<Self> {
#[cfg(windows)]
let _ = ansi_term::enable_ansi_support();
let interactive_output = atty::is(Stream::Stdout);
Ok(App {
matches: Self::matches(interactive_output)?,
interactive_output,
})
}
fn matches(interactive_output: bool) -> Result<ArgMatches<'static>> {
let args = if wild::args_os().nth(1) == Some("cache".into())
|| wild::args_os().any(|arg| arg == "--no-config")
{
// Skip the arguments in bats config file
wild::args_os().collect::<Vec<_>>()
} else {
let mut cli_args = wild::args_os();
// Read arguments from bats config file
let mut args = get_args_from_env_var()
.unwrap_or_else(get_args_from_config_file)
.chain_err(|| "Could not parse configuration file")?;
// Put the zero-th CLI argument (program name) first
args.insert(0, cli_args.next().unwrap());
// .. and the rest at the end
cli_args.for_each(|a| args.push(a));
args
};
Ok(clap_app::build_app(interactive_output).get_matches_from(args))
}
pub fn config(&self) -> Result<Config> {
let files = self.files()?;
let style_components = self.style_components()?;
let paging_mode = match self.matches.value_of("paging") {
Some("always") => PagingMode::Always,
Some("never") => PagingMode::Never,
Some("auto") | _ => {
if self.matches.occurrences_of("plain") > 1 {
// If we have -pp as an option when in auto mode, the pager should be disabled.
PagingMode::Never
} else if files.contains(&InputFile::StdIn(None)) {
// If we are reading from stdin, only enable paging if we write to an
// interactive terminal and if we do not *read* from an interactive
// terminal.
if self.interactive_output && !atty::is(Stream::Stdin) {
PagingMode::QuitIfOneScreen
} else {
PagingMode::Never
}
} else if self.interactive_output {
PagingMode::QuitIfOneScreen
} else {
PagingMode::Never
}
}
};
let mut syntax_mapping = SyntaxMapping::builtin();
if let Some(values) = self.matches.values_of("map-syntax") {
for from_to in values {
let parts: Vec<_> = from_to.split(':').collect();
if parts.len() != 2 {
return Err("Invalid syntax mapping. The format of the -m/--map-syntax option is '<glob-pattern>:<syntax-name>'. For example: '*.cpp:C++'.".into());
}
syntax_mapping.insert(parts[0], MappingTarget::MapTo(parts[1]))?;
}
}
let maybe_term_width = self.matches.value_of("terminal-width").and_then(|w| {
if w.starts_with('+') || w.starts_with('-') {
// Treat argument as a delta to the current terminal width
w.parse().ok().map(|delta: i16| {
let old_width: u16 = Term::stdout().size().1;
let new_width: i32 = i32::from(old_width) + i32::from(delta);
if new_width <= 0 {
old_width as usize
} else {
new_width as usize
}
})
} else {
w.parse().ok()
}
});
Ok(Config {
true_color: is_truecolor_terminal(),
language: self.matches.value_of("language").or_else(|| {
if self.matches.is_present("show-all") {
Some("show-nonprintable")
} else {
None
}
}),
show_nonprintable: self.matches.is_present("show-all"),
output_wrap: if self.interactive_output || maybe_term_width.is_some() {
match self.matches.value_of("wrap") {
Some("character") => OutputWrap::Character,
Some("never") => OutputWrap::None,
Some("auto") | _ => {
if style_components.plain() {
OutputWrap::None
} else {
OutputWrap::Character
}
}
}
} else {
// We don't have the tty width when piping to another program.
// There's no point in wrapping when this is the case.
OutputWrap::None
},
colored_output: match self.matches.value_of("color") {
Some("always") => true,
Some("never") => false,
Some("auto") | _ => self.interactive_output,
},
paging_mode,
term_width: maybe_term_width.unwrap_or(Term::stdout().size().1 as usize),
loop_through: !(self.interactive_output
|| self.matches.value_of("color") == Some("always")
|| self.matches.value_of("decorations") == Some("always")),
files,
tab_width: self
.matches
.value_of("tabs")
.map(String::from)
.or_else(|| env::var("BAT_TABS").ok())
.and_then(|t| t.parse().ok())
.unwrap_or(
if style_components.plain() && paging_mode == PagingMode::Never {
0
} else {
4
},
),
theme: self
.matches
.value_of("theme")
.map(String::from)
.or_else(|| env::var("BAT_THEME").ok())
.map(|s| {
if s == "default" {
String::from(HighlightingAssets::default_theme())
} else {
s
}
})
.unwrap_or_else(|| String::from(HighlightingAssets::default_theme())),
line_ranges: self
.matches
.values_of("line-range")
.map(|vs| vs.map(LineRange::from).collect())
.transpose()?
.map(LineRanges::from)
.unwrap_or_default(),
style_components,
syntax_mapping,
pager: self.matches.value_of("pager"),
use_italic_text: match self.matches.value_of("italic-text") {
Some("always") => true,
_ => false,
},
highlighted_lines: self
.matches
.values_of("highlight-line")
.map(|ws| ws.map(LineRange::from).collect())
.transpose()?
.map(LineRanges::from)
.map(|lr| HighlightedLineRanges(lr))
.unwrap_or_default(),
})
}
fn files(&self) -> Result<Vec<InputFile>> {
// verify equal length of file-names and input FILEs
match self.matches.values_of("file-name") {
Some(ref filenames)
if self.matches.values_of_os("FILE").is_some()
&& filenames.len() != self.matches.values_of_os("FILE"<
|