Add a "touch" command (kamiyaa#66)

* touch existing file works

* touch can create files

* bind key sequence "ft" to command ":touch "

* fix: touch can touch new file in empty directory

Cargo.toml

@@ -12,6 +12,7 @@ alphanumeric-sort = "^1"
 chrono = "^0"
 colors-transform = "^0"
 dirs-next = "^2"
+filetime = "^0"
 globset = "^0"
 lazy_static = "^1"
 libc = "^0"

config/keymap.toml

@@ -166,6 +166,9 @@ keys = [ "m", "k" ]
 [[mapcommand]]
 command = ":rename "
 keys = [ "c", "w" ]
+[[mapcommand]]
+command = ":touch"
+keys = [ "f", "t" ]
 
 [[mapcommand]]
 command = "sort lexical"

src/commands/key_command.rs

@@ -51,6 +51,7 @@ pub enum KeyCommand {
     RenameFile(path::PathBuf),
     RenameFileAppend,
     RenameFilePrepend,
+    TouchFile(String),
 
     SearchGlob(String),
     SearchString(String),
@@ -109,6 +110,7 @@ impl KeyCommand {
             Self::ForceQuit => "force_quit",
             Self::ReloadDirList => "reload_dirlist",
             Self::RenameFile(_) => "rename",
+            Self::TouchFile(_) => "touch",
             Self::RenameFileAppend => "rename_append",
             Self::RenameFilePrepend => "rename_prepend",
 
@@ -263,6 +265,7 @@ impl KeyCommand {
                     Ok(Self::RenameFile(path))
                 }
             },
+            "touch" => Ok(Self::TouchFile(arg.to_string())),
             "rename_append" => Ok(Self::RenameFileAppend),
             "rename_prepend" => Ok(Self::RenameFilePrepend),
             "search" => match arg {
@@ -392,6 +395,7 @@ impl AppExecute for KeyCommand {
             Self::RenameFile(p) => rename_file::rename_file(context, p.as_path()),
             Self::RenameFileAppend => rename_file::rename_file_append(context, backend),
             Self::RenameFilePrepend => rename_file::rename_file_prepend(context, backend),
+            Self::TouchFile(arg) => touch_file::touch_file(context, arg.as_str()),
             Self::SearchGlob(pattern) => search_glob::search_glob(context, pattern.as_str()),
             Self::SearchString(pattern) => search_string::search_string(context, pattern.as_str()),
             Self::SearchSkim => search_skim::search_skim(context, backend),

src/commands/mod.rs

@@ -22,6 +22,7 @@ pub mod show_hidden;
 pub mod show_workers;
 pub mod sort;
 pub mod tab_ops;
+pub mod touch_file;
 
 pub mod command_keybind;
 pub mod key_command;

src/commands/touch_file.rs

@@ -0,0 +1,49 @@
+use std::path;
+
+use crate::context::AppContext;
+use crate::error::JoshutoResult;
+use crate::util::load_child::LoadChild;
+use filetime::FileTime;
+use std::fs::File;
+use std::time::SystemTime;
+
+fn _update_actime(file: &path::Path) -> std::io::Result<()> {
+    let file_time = FileTime::from_system_time(SystemTime::now());
+    filetime::set_file_times(file, file_time, file_time)
+}
+
+fn _create_file(file: &path::Path) -> std::io::Result<()> {
+    File::create(file)?;
+    Ok(())
+}
+
+pub fn touch_file(context: &mut AppContext, arg: &str) -> JoshutoResult<()> {
+    match arg {
+        "" => {
+            match context
+                .tab_context_ref()
+                .curr_tab_ref()
+                .curr_list_ref()
+                .and_then(|s| s.curr_entry_ref())
+                .map(|s| s.file_path().to_path_buf())
+            {
+                Some(selected_file_path) => _update_actime(&selected_file_path)?,
+                None => {}
+            }
+        }
+        file_arg => {
+            let file = path::PathBuf::from(file_arg);
+            if file.exists() {
+                _update_actime(file.as_path())?;
+            } else {
+                _create_file(file.as_path())?;
+            }
+        }
+    }
+    let options = context.config_ref().display_options_ref().clone();
+    if let Some(curr_list) = context.tab_context_mut().curr_tab_mut().curr_list_mut() {
+        curr_list.reload_contents(&options)?;
+    }
+    LoadChild::load_child(context)?;
+    Ok(())
+}