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use {
super::*,
crate::{
app::*,
display::W,
errors::ProgramError,
launchable::Launchable,
},
std::{
fs::OpenOptions,
io::Write,
path::PathBuf,
},
};
/// Definition of how the user input should be interpreted
/// to be executed in an external command.
#[derive(Debug, Clone)]
pub struct ExternalExecution {
/// the pattern which will result in an executable string when
/// completed with the args.
/// This pattern may include names coming from the invocation
/// pattern (like {my-arg}) and special names automatically filled by
/// broot from the selection and application state:
/// * {file}
/// * {directory}
/// * {parent}
/// * {other-panel-file}
/// * {other-panel-directory}
/// * {other-panel-parent}
pub exec_pattern: ExecPattern,
/// how the external process must be launched
pub exec_mode: ExternalExecutionMode,
/// the working directory of the new process, or none if we don't
/// want to set it
pub working_dir: Option<String>,
}
impl ExternalExecution {
pub fn new(
exec_pattern: ExecPattern,
exec_mode: ExternalExecutionMode,
) -> Self {
Self {
exec_pattern,
exec_mode,
working_dir: None,
}
}
pub fn with_working_dir(mut self, b: Option<String>) -> Self {
self.working_dir = b;
self
}
/// goes from the external execution command to the CmdResult:
/// - by executing the command if it can be executed from a subprocess
/// - by building a command to be executed in parent shell in other cases
pub fn to_cmd_result(
&self,
w: &mut W,
builder: ExecutionStringBuilder<'_>,
con: &AppContext,
) -> Result<CmdResult, ProgramError> {
match self.exec_mode {
ExternalExecutionMode::FromParentShell => self.cmd_result_exec_from_parent_shell(
builder,
con,
),
ExternalExecutionMode::LeaveBroot => self.cmd_result_exec_leave_broot(
builder,
con,
),
ExternalExecutionMode::StayInBroot => self.cmd_result_exec_stay_in_broot(
w,
builder,
con,
),
}
}
fn working_dir_path(
&self,
builder: &ExecutionStringBuilder<'_>,
) -> Option<PathBuf> {
self.working_dir
.as_ref()
.map(|pattern| builder.path(pattern))
.filter(|pb| {
if pb.exists() {
true
} else {
warn!("workding dir doesn't exist: {:?}", pb);
false
}
})
}
/// build the cmd result as an executable which will be called
/// from the parent shell (meaning broot must quit)
fn cmd_result_exec_from_parent_shell(
&self,
builder: ExecutionStringBuilder<'_>,
con: &AppContext,
) -> Result<CmdResult, ProgramError> {
if builder.sel_info.count_paths() > 1 {
return Ok(CmdResult::error(
"only verbs returning to broot on end can be executed on a multi-selection"
));
}
if let Some(ref export_path) = con.launch_args.outcmd {
// Broot was probably launched as br.
// the whole command is exported in the passed file
let f = OpenOptions::new().append(true).open(export_path)?;
writeln!(&f, "{}", builder.shell_exec_string(&self.exec_pattern))?;
Ok(CmdResult::Quit)
} else {
Ok(CmdResult::error(
"this verb needs broot to be launched as `br`. Try `broot --install` if necessary."
))
}
}
/// build the cmd result as an executable which will be called in a process
/// launched by broot at end of broot
fn cmd_result_exec_leave_broot(
&self,
builder: ExecutionStringBuilder<'_>,
con: &AppContext,
) -> Result<CmdResult, ProgramError> {
if builder.sel_info.count_paths() > 1 {
return Ok(CmdResult::error(
"only verbs returning to broot on end can be executed on a multi-selection"
));
}
let launchable = Launchable::program(
builder.exec_token(&self.exec_pattern),
self.working_dir_path(&builder),
con,
)?;
Ok(CmdResult::from(launchable))
}
/// build the cmd result as an executable which will be called in a process
/// launched by broot
fn cmd_result_exec_stay_in_broot(
&self,
w: &mut W,
builder: ExecutionStringBuilder<'_>,
con: &AppContext,
) -> Result<CmdResult, ProgramError> {
let working_dir_path = self.working_dir_path(&builder);
match &builder.sel_info {
SelInfo::None | SelInfo::One(_) => {
// zero or one selection -> only one execution
let launchable = Launchable::program(
builder.exec_token(&self.exec_pattern),
working_dir_path,
con,
)?;
info!("Executing not leaving, launchable {:?}", launchable);
if let Err(e) = launchable.execute(Some(w)) {
warn!("launchable failed : {:?}", e);
return Ok(CmdResult::error(e.to_string()));
}
}
SelInfo::More(stage) => {
// multiselection -> we must execute on all paths
let sels = stage.paths().iter()
.map(|path| Selection {
path,
line: 0,
stype: SelectionType::from(path),
is_exe: false,
});
for sel in sels {
let launchable = Launchable::program(
builder.sel_exec_token(&self.exec_pattern, Some(sel)),
working_dir_path.clone(),
con,
)?;
if let Err(e) = launchable.execute(Some(w)) {
warn!("launchable failed : {:?}", e);
return Ok(CmdResult::error(e.to_string()));
}
}
}
}
Ok(CmdResult::RefreshState { clear_cache: true })
}
}
|
