implemented push and pop commands, push command saves the wrong path though

bash_setup.sh

@@ -4,18 +4,15 @@ export PATH="$PATH:$PWD/target/debug/"
 pid=( $(ps -o ppid) )
 arg_pid=" --pid ${pid[-2]} "
 
-nav() {
-    cd "$(navigate ${arg_pid} $*)"
-}
 
 push() {
-    cd "$(navigate push ${arg_pid} $*)"
+    \builtin cd -- "$(navigate ${arg_pid} push $@)"
 }
 
 pop() {
-    cd "$(navigate pop ${arg_pid} $*)"
+    \builtin cd -- "$(navigate ${arg_pid} pop $@)"
 }
 
 stack() {
-    "navigate stack ${arg_pid}"
-}
+	echo "$(navigate ${arg_pid} show $*)"
+}

src/arguments.rs

@@ -1,17 +1,18 @@
 use clap::{Parser, Args, Subcommand};
+use std::path::PathBuf;
 
 
 /// implements stack for cd wrapper script
 #[derive(Parser, Debug)]
 #[clap(author, version, about, long_about=None)]
 pub struct Arguments {
-    /// subcommand
-    #[command(subcommand)]
-    pub action: Action,
-
     /// process id of parent shell
     #[arg(short, long)]
     pub pid: u32,
+
+    /// subcommand
+    #[command(subcommand)]
+    pub action: Action,
 }
 
 #[derive(Debug, Clone, Subcommand)]
@@ -22,8 +23,8 @@ pub enum Action {
     /// navigate to last entry in stack and remove it
     pop(PopArgs),
 
-    /// display stack
-    stack(StackArgs),
+    /// show stack
+    show(ShowArgs),
 
     /// navigate to bookmark and add current path to the stack
     bookmark(BookmarkArgs),
@@ -33,33 +34,35 @@ pub enum Action {
 pub struct PushArgs {
     /// show stack
     #[arg(short, long)]
-    show_stack: Option<bool>,
+    pub show_stack: Option<bool>,
 
     /// change to <path>
-    path: String,
+    pub path: PathBuf,
 }
 
 #[derive(Debug, Clone, Args)]
 pub struct PopArgs {
     /// show stack
     #[arg(short, long)]
-    show_stack: Option<bool>,
+    pub show_stack: Option<bool>,
 }
 
 #[derive(Debug, Clone, Args)]
-pub struct StackArgs {
+pub struct ShowArgs {
     /// hide entry numbers
     #[arg(short='n', long)]
-    hide_numbers: Option<bool>,
+    pub hide_numbers: Option<bool>,
 
     /// show n entries
     #[arg(short, long="lines")]
-    lines: Option<u32>,
+    pub lines: Option<u32>,
 }
 
 #[derive(Debug, Clone, Args)]
 pub struct BookmarkArgs {
     /// show stack
     #[arg(short, long)]
-    show_stack: Option<bool>,
+    pub show_stack: Option<bool>,
+
+    pub mark: String,
 }

src/main.rs

@@ -1,13 +1,46 @@
 mod arguments;
 mod stack;
 
-use clap::Parser;
-use arguments::Arguments;
+use std::io::{Result, Error, ErrorKind};
+use std::path::PathBuf;
+use clap::{FromArgMatches, Parser};
+use arguments::*;
 use stack::Stack;
 
 
-fn main() {
+fn main() -> Result<()> {
     let args = Arguments::parse();
+    let mut stack = Stack::new(args.pid).expect("failed to build stack");
 
-    let stack = Stack::new(args.pid);
-}
+    return match args.action {
+        Action::push(push_args) => handle_push(&push_args, &mut stack),
+        Action::pop(pop_args) => handle_pop(&pop_args, &mut stack),
+        Action::show(show_args) => handle_show(&show_args, &mut stack),
+        Action::bookmark(bookmark_args) => handle_bookmark(&bookmark_args, &mut stack),
+        _ => Err(Error::new(ErrorKind::Other, "unknown subcommand")),
+    };
+}
+
+pub fn handle_push (args: &PushArgs, stack: &mut Stack) -> Result<()> { // TODO: handle arguments
+    stack.push_entry(&args.path)?;
+    println!("{}", args.path.to_str().unwrap());
+    return Ok(());
+}
+
+pub fn handle_pop (args: &PopArgs, stack: &mut Stack) -> Result<()> { // TODO: handle arguments
+    let path = stack.pop_entry()?;
+    println!("{}", path.to_str().unwrap());
+    return Ok(());
+}
+
+pub fn handle_show (args: &ShowArgs, stack: &mut Stack) -> Result<()> { // TODO: handle arguments
+    let output = stack.get_stack()?;
+    for item in output {
+        println!("{}", item.to_str().unwrap());
+    }
+    return Ok(());
+}
+
+pub fn handle_bookmark (args: &BookmarkArgs, stack: &mut Stack) -> Result<()> { // TODO: handle arguments
+    return Ok(());
+}

src/stack.rs

@@ -1,9 +1,9 @@
 
-use std::io::{Result};
 use std::fs;
 use std::fs::File;
 use std::path::{PathBuf};
 use std::str::FromStr;
+use std::io::{Result, Error, ErrorKind};
 use sysinfo::{System, Pid};
 
 
@@ -11,6 +11,7 @@ use sysinfo::{System, Pid};
 pub struct Stack
 {
     pid: u32,
+    path: PathBuf,
     stack: Vec<PathBuf>,
 }
 
@@ -20,29 +21,57 @@ impl Stack
     pub fn new(process_id: u32) -> Result<Self> {
         let mut stack: Stack = Stack{
             pid : process_id,
+            path : PathBuf::new(),
             stack : Vec::<PathBuf>::new(),
         };
 
-        stack.stack = stack.build_stack()?;
+        _ = stack.build_stack()?;
 
         return Ok(stack);
     }
 
+    /**
+     * return stack
+     */
+    pub fn get_stack(&mut self) -> Result<&Vec<PathBuf>> {
+        return Ok(&self.stack);
+    }
+
     /**
      * push entry to stack
      * returns updated stack
      */
-    pub fn push_entry(&mut self, path: PathBuf) -> Vec<PathBuf> {
-        self.stack.push(path);
-        return self.stack.clone();
+    pub fn push_entry(&mut self, path: &PathBuf) -> Result<&Vec<PathBuf>> {
+        let abs_path = path.canonicalize()?;
+        self.stack.push(abs_path);
+        self.write_stack_file()?;
+        return Ok(&self.stack);
     }
 
     /**
      * pop entry from stack
      * return poppe entry
      */
-    pub fn pop_entry(&mut self) -> PathBuf {
-        return self.stack.pop().unwrap();
+    pub fn pop_entry(&mut self) -> Result<PathBuf> {
+        let entry = self.stack.pop();
+        self.write_stack_file()?;
+
+        return match entry {
+            Some(entry) => Ok(entry),
+            None => Err(Error::new(ErrorKind::Other, "pop failed to retrieve item from stack")),
+        }
+    }
+
+    /**
+     * get entry by number
+     * return nth last entry
+     */
+    pub fn get_entry_by_number(&mut self, entry_number: u32) -> Result<&PathBuf> {
+        if entry_number > (self.stack.len() as u32 - 1) {
+            return Err(Error::new(ErrorKind::Other, "requested entry number is out of bounds"));
+        }
+        // index from the end of the vector as new entries are appended at the end of the list
+        return Ok(&self.stack[self.stack.len() - (entry_number as usize)]);
     }
 
     /**
@@ -69,14 +98,14 @@ impl Stack
             let _ = fs::create_dir(stack_dir.clone())?;
         }
     
-        let mut stack_file_path = stack_dir.clone();
-        stack_file_path.push(PathBuf::from(&self.pid.to_string()));
-        if stack_file_path.is_file() {
+        self.path = stack_dir.clone();
+        self.path.push(PathBuf::from(&self.pid.to_string()));
+        if self.path.is_file() {
             // read and parse stack file
-            let _ = self.parse_stack_file(stack_file_path);
+            _ = self.read_stack_file(&self.path.clone())?;
         } else {
             // create stack file and store current path
-            let _ = File::create(stack_file_path.clone())?;
+            _ = File::create(self.path.clone())?;
         }
     
         return Ok(vec![stack_dir]);
@@ -85,7 +114,7 @@ impl Stack
     /**
      * parse stack file
      */
-    fn parse_stack_file(&mut self, stack_file_path: PathBuf) -> Result<()> {
+    fn read_stack_file(&mut self, stack_file_path: &PathBuf) -> Result<()> {
         let stack = fs::read_to_string(stack_file_path)?;
         let stack = stack.split("\n");
         for entry in stack {
@@ -95,5 +124,18 @@ impl Stack
         return Ok(());
     }
 
+    /**
+     * write stack current stack to file to save it for next execution
+     */
+    fn write_stack_file(&mut self) -> Result<()> {
+        let mut output = Vec::<&str>::new();
+        for entry in &self.stack {
+            output.push(entry.to_str().expect("failed to convert stack entry to string"));
+        }
+        fs::write(self.path.clone(), output.join("\n"))?;
+
+        return Ok(())
+    }
+
 } // end `impl database`