Add `capture` and `stdout` commands (#495)

This adds two new commands as a base to enable users to use the output
of scripts to do certain actions in Joshuto.

The first command this adds is a third command to start a sub-process
beside `shell` and `spawn`, called `capture`. Like `shell`, `capture` is
running blocking but unlike `shell`, it does not release the terminal
but captures the `stdout` of the sub-process and stores it in an
`AppContext` attribute.

The second command added by this commit is `stdout`. This command takes
the output from the last `capture` run, stored in the `AppContext`
attribute, and uses it for some action. The action has to be specified
as a sub-command. As of now, only `stdout cd` is implemented. This
checks that the last output of `capture` is a single line of an existing
file or directory and then changes the working directory to that.

To get significant value from these new commands, `capture` needs to be
equipped with more variables to feed more information about Joshuto's
state into external scripts, and `stdout` needs to get some more
sub-commands.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/key_command/command.rs b/src/key_command/command.rs
index fad1530..0a4736f 100644
--- a/src/key_command/command.rs
+++ b/src/key_command/command.rs
@@ -3,6 +3,8 @@ use std::path;
 use crate::commands::case_sensitivity::SetType;
 use crate::commands::quit::QuitAction;
 use crate::commands::select::SelectOption;
+use crate::commands::stdout::PostProcessor;
+use crate::commands::sub_process::SubprocessCallMode;
 use crate::config::clean::app::display::line_mode::LineMode;
 use crate::config::clean::app::display::line_number::LineNumberStyle;
 use crate::config::clean::app::display::new_tab::NewTabMode;
@@ -137,7 +139,7 @@ pub enum Command {
     SetMode,
     SubProcess {
         words: Vec<String>,
-        spawn: bool,
+        mode: SubprocessCallMode,
     },
     ShowTasks,
 
@@ -181,6 +183,9 @@ pub enum Command {
     SelectFzf {
         options: SelectOption,
     },
+    StdOutPostProcess {
+        processor: PostProcessor,
+    },
     Zoxide(String),
     ZoxideInteractive,