diff options
Diffstat (limited to 'src/output.rs')
-rw-r--r-- | src/output.rs | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/src/output.rs b/src/output.rs deleted file mode 100644 index e0b567a6..00000000 --- a/src/output.rs +++ /dev/null @@ -1,118 +0,0 @@ -use std::env; -use std::ffi::OsString; -use std::io::{self, Write}; -use std::path::PathBuf; -use std::process::{Child, Command, Stdio}; - -use shell_words; - -use crate::app::PagingMode; -use crate::errors::*; - -pub enum OutputType { - Pager(Child), - Stdout(io::Stdout), -} - -impl OutputType { - pub fn from_mode(mode: PagingMode, pager: Option<&str>) -> Result<Self> { - use self::PagingMode::*; - Ok(match mode { - Always => OutputType::try_pager(false, pager)?, - QuitIfOneScreen => OutputType::try_pager(true, pager)?, - _ => OutputType::stdout(), - }) - } - - /// Try to launch the pager. Fall back to stdout in case of errors. - fn try_pager(quit_if_one_screen: bool, pager_from_config: Option<&str>) -> Result<Self> { - let mut replace_arguments_to_less = false; - - let pager_from_env = match (env::var("BAT_PAGER"), env::var("PAGER")) { - (Ok(bat_pager), _) => Some(bat_pager), - (_, Ok(pager)) => { - // less needs to be called with the '-R' option in order to properly interpret the - // ANSI color sequences printed by bat. If someone has set PAGER="less -F", we - // therefore need to overwrite the arguments and add '-R'. - // - // We only do this for PAGER (as it is not specific to 'bat'), not for BAT_PAGER - // or bats '--pager' command line option. - replace_arguments_to_less = true; - Some(pager) - } - _ => None, - }; - - let pager_from_config = pager_from_config.map(|p| p.to_string()); - - if pager_from_config.is_some() { - replace_arguments_to_less = false; - } - - let pager = pager_from_config - .or(pager_from_env) - .unwrap_or_else(|| String::from("less")); - - let pagerflags = - shell_words::split(&pager).chain_err(|| "Could not parse pager command.")?; - - match pagerflags.split_first() { - Some((pager_name, args)) => { - let mut pager_path = PathBuf::from(pager_name); - - if pager_path.file_stem() == Some(&OsString::from("bat")) { - pager_path = PathBuf::from("less"); - } - - let is_less = pager_path.file_stem() == Some(&OsString::from("less")); - - let mut process = if is_less { - let mut p = Command::new(&pager_path); - if args.is_empty() || replace_arguments_to_less { - p.args(vec!["--RAW-CONTROL-CHARS", "--no-init"]); - if quit_if_one_screen { - p.arg("--quit-if-one-screen"); - } - } else { - p.args(args); - } - p.env("LESSCHARSET", "UTF-8"); - p - } else { - let mut p = Command::new(&pager_path); - p.args(args); - p - }; - - Ok(process - .stdin(Stdio::piped()) - .spawn() - .map(OutputType::Pager) - .unwrap_or_else(|_| OutputType::stdout())) - } - None => Ok(OutputType::stdout()), - } - } - - fn stdout() -> Self { - OutputType::Stdout(io::stdout()) - } - - pub fn handle(&mut self) -> Result<&mut dyn Write> { - Ok(match *self { - OutputType::Pager(ref mut command) => command - .stdin - .as_mut() - .chain_err(|| "Could not open stdin for pager")?, - OutputType::Stdout(ref mut handle) => handle, - }) - } -} - -impl Drop for OutputType { - fn drop(&mut self) { - if let OutputType::Pager(ref mut command) = *self { - let _ = command.wait(); - } - } -} |