#3 Rework Contexts

src/backend/context.rs

@@ -1,19 +1,124 @@
-use crate::backend::project::Config;
+use std::{
+    cell::{Cell, RefCell},
+    env, fs, io,
+};
+
+use crate::{backend::project::Config, frontend::terminal::print_err};
 
 use super::project::get_config_from_fs;
 
-/**
- * Represents the currently loaded project
- */
+/// Represents the context of the currently loaded project.
 pub struct ProjectContext {
+    /// Project config (espresso.toml)
     pub config: Config,
+    /// Absolute paths (with suffixes known at compile time) that're relavent to this project (ex: path to src)
+    pub absolute_paths: AbsoltuePaths,
+    /// Absolute paths (with suffixes NOT known at compile time) that're relavent to this project (ex: path to base package)
+    pub dynamic_absolute_paths: DynamicAbsolutePaths,
+    /// If we're running in debug mode (ESPRESSO_DEBUG=1)
+    pub debug_mode: bool,
+}
+
+/// Contains absolute paths to critical resources within the currently loaded project.
+pub struct AbsoltuePaths {
+    /// Path to the currently loaded projects directory. Should be the current working directory.
+    pub project: String,
+    /// Path to the src/ directory within the currently loaded project.
+    pub source: String,
+    /// Path to the config file within the currently loaded project.
+    pub config: String,
+}
+
+/// Contains absolute paths to critical resources within the currently loaded project. Determined at runtime.
+pub struct DynamicAbsolutePaths {
+    /// Path to the base package. Should be {source}/package/path/here. The Main.java file will live here.
+    pub base_package: String,
+}
+
+/// Get if debug mode is active. You can enable debug mode by setting the `ESPRESSO_DEBUG`
+/// environment variable to `1`.
+///
+/// # Returns
+///
+/// `true` if `ESPRESSO_DEBUG=1`, `false` if `ESPRESSO_DEBUG=0` or not set
+pub fn get_debug_mode() -> bool {
+    match env::var("ESPRESSO_DEBUG") {
+        Ok(v) => {
+            if v == "1" {
+                return true;
+            } else if v == "0" {
+                return false;
+            } else {
+                return false;
+            }
+        }
+        Err(_) => return false,
+    };
+}
+
+/// Get an AbsolutePaths struct
+///
+/// # Arguments
+///
+/// * `config`: Reference to a Config
+/// * `debug_mode`: Reference to a bool if we're in debug mode
+///
+/// # Returns
+///
+/// AbsolutePaths
+pub fn get_absolute_paths(debug_mode: &bool) -> AbsoltuePaths {
+    let mut cwd = env::current_dir()
+        .expect("Failed to read the current working directory; are you in a shell?")
+        .to_string_lossy()
+        .into_owned();
+
+    if *debug_mode {
+        cwd += "/espresso_debug"
+    }
+
+    AbsoltuePaths {
+        project: cwd.clone(),
+        source: cwd.clone() + "/src/java",
+        config: cwd.clone() + "/espresso.toml",
+    }
+}
+
+/// Get a DynamicAbsolutePaths struct.
+///
+/// # Arguments
+/// * `ap`: Reference to an `AbsolutePaths` struct. Used to get the `src/` directory.
+/// * `config`: Reference to a `Config` struct. used to get the current `base_package`.
+/// * `debug_mode`: Reference to a bool if we're in debug mode
+///
+/// # Returns
+///
+/// DynamicAbsolutePaths
+pub fn get_dynamic_absolute_paths(ap: &AbsoltuePaths, config: &Config) -> DynamicAbsolutePaths {
+    let base_package = ap.source.clone()
+            + "/" + config
+                .project
+                .base_package
+                .clone()
+                .replace(".", "/")
+                .as_str();
+    DynamicAbsolutePaths { base_package }
 }
 
-/**
- * Get the Project Context
- */
+/// Get context about the currently loaded project.
+///
+/// # Returns
+///
+/// ProjectContext
 pub fn get_project_context() -> ProjectContext {
+    let debug_mode = get_debug_mode();
+    let absolute_paths = get_absolute_paths(&debug_mode);
+    let config = get_config_from_fs(&absolute_paths);
+    let dynamic_absolute_paths = get_dynamic_absolute_paths(&absolute_paths, &config);
+
     ProjectContext {
-        config: get_config_from_fs()
+        config,
+        absolute_paths,
+        debug_mode,
+        dynamic_absolute_paths,
     }
 }

src/backend/mod.rs

@@ -1,3 +1,3 @@
+pub mod context;
 pub mod project;
 pub mod toolchain;
-pub mod context;

src/backend/project.rs

@@ -1,6 +1,8 @@
-use std::{collections::HashMap, env, fs::{self, create_dir_all}, path::Path};
+use crate::util::pathutil;
+
+use super::context::{AbsoltuePaths, ProjectContext};
 use serde::{Deserialize, Serialize};
-use super::context::ProjectContext;
+use std::{collections::HashMap, fs, io};
 
 #[derive(Deserialize, Serialize, Debug)]
 pub struct Config {
@@ -21,80 +23,22 @@ pub struct Toolchain {
     pub path: String,
 }
 
-/**
- * Get if ESPRESSO_DEBUG=1
- */
-pub fn get_debug_mode() -> bool {
-    match env::var("ESPRESSO_DEBUG") {
-        Ok(v) => {
-            if v == "1" {
-                return true
-            } else if v == "0" {
-                return false
-            } else {
-                return false
-            }
-        }
-        Err(_) => return false,
-    };
-}
-
-/**
- * Get the config path. Note, this value changes if ESPRESSO_DEBUG=1
- */
-pub fn get_config_path() -> String {
-    let debug_mode = get_debug_mode();
-    if debug_mode {
-        "espresso_debug/espresso.toml".to_string()
-    } else {
-        "espresso.toml".to_string()
-    }
-}
-
-pub fn get_absolute_project_path() -> String {
-    let debug_mode = get_debug_mode();
-    let current_dir = env::current_dir().unwrap().to_string_lossy().into_owned();
-    if debug_mode {
-        current_dir + "/espresso_debug"
-    } else {
-        current_dir
-    }
-}
-
-/**
- * Get the source path. Note, this value is prefixed with `espresso_debug` if ESPRESSO_DEBUG=1
- */
-pub fn get_source_path() -> String {
-    (get_absolute_project_path() + "/src/java").to_string()
-}
-
-/**
- * Ensure development directory exists
- */
-pub fn ensure_debug_directory_exists_if_debug(){
-    if !get_debug_mode() {
-        return;
-    }
-    if !Path::exists(Path::new("espresso_debug")) {
-        create_dir_all("espresso_debug").expect("Failed to ensure debug directory exists");
-    }
-}
-
 /**
  * Load the project at the current working directory
  */
-pub fn get_config_from_fs() -> Config {
-    let contents = fs::read_to_string(get_config_path()).expect("Unable to read conig file");
+pub fn get_config_from_fs(ap: &AbsoltuePaths) -> Config {
+    let contents = fs::read_to_string(ap.config.clone()).expect("Unable to read conig file");
     toml::from_str(&contents).unwrap()
 }
 
+
 /**
  * If a project exists. A project is deemed existing if it has a source directory
  * and a config file.
  */
-pub fn does_exist() -> bool {
-    let source_exists = does_source_exist();
-    let config_exists = does_config_exist();
+pub fn does_exist(ap: &AbsoltuePaths) -> bool {
+    let source_exists = pathutil::does_path_exist(&ap.source);
+    let config_exists = pathutil::does_path_exist(&ap.config);
 
     // Return false if either source or config does not exist
     if !source_exists || !config_exists {
@@ -105,32 +49,16 @@ pub fn does_exist() -> bool {
     true
 }
 
-/**
- * If the source path (ex: src) exists
- */
-pub fn does_source_exist() -> bool {
-    Path::exists(Path::new(get_source_path().as_str()))
-}
-
-/**
- * Checks if the config exists
- */
-pub fn does_config_exist() -> bool {
-    Path::exists(Path::new(get_config_path().as_str()))
-}
-
-/**
- * Get the base package path. This value is the `location of src + base_package`
- */
-pub fn get_full_base_package_path(p_ctx: &ProjectContext) -> String{
-    format!("{}/{}", get_source_path(), p_ctx.config.project.base_package.replace(".", "/"))
-}
-
 /**
  * Initialize the source tree
  */
-pub fn initialize_source_tree(p_ctx: &ProjectContext) {
-    std::fs::create_dir_all(get_full_base_package_path(p_ctx)).expect("failed to create main package directories in file system");
+pub fn initialize_source_tree(p_ctx: &ProjectContext) -> io::Result<()>{
+    // get the base backage (dot notation) and the base package path on the fs
+    let base_package_path = p_ctx.dynamic_absolute_paths.base_package.clone();
+    let base_package = p_ctx.config.project.base_package.clone();
+
+    // ensure the base package path exists
+    std::fs::create_dir_all(&base_package_path)?;
 
     // create the Main.java file (textwrap doesn't work????)
     let base_java_content = r#"package ${BASE_PACKAGE};
@@ -140,9 +68,16 @@ public class Main {
     public static void main(String[] args) {
         System.out.println("Hello, world!");
     }
-}"#.replace("${BASE_PACKAGE}", &p_ctx.config.project.base_package);
-
-    std::fs::write(get_full_base_package_path(p_ctx) + "/Main.java", base_java_content);
+}"#
+    .replace("${BASE_PACKAGE}", &base_package);
+
+    // write an example java file
+    std::fs::write(
+        base_package_path.clone() + "/Main.java",
+        base_java_content,
+    )?;
+
+    Ok(())
 }
 
 fn process_input(x: String, default: String) -> String {
@@ -156,8 +91,8 @@ fn process_input(x: String, default: String) -> String {
 /**
  * Initialize a config
  */
-pub fn initialize_config(name: String, base_package: String) {
-    // process the name
+pub fn initialize_config(name: String, base_package: String, ap: &AbsoltuePaths) -> io::Result<()> {
+
     // populate a base_config struct
     let base_config = Config {
         project: Project {
@@ -173,5 +108,22 @@ pub fn initialize_config(name: String, base_package: String) {
 
     // write it to a toml string, then write it to the config file
     let toml_string = toml::to_string(&base_config).expect("Failed to serialize struct");
-    fs::write(get_config_path(), toml_string).expect("Failed to write config file")
-}
+    fs::write(ap.config.clone(), toml_string)?;
+    Ok(())
+}
+
+
+/// Ensure the project environment is properly setup
+/// 
+/// # Arguments
+/// * `ap`: Reference to an `AbsolutePaths` struct
+/// * `debug_mode`: Reference to a bool that defines if we're in debug mode or not
+/// 
+/// # Returns
+/// `io::Result`, propagated from `fs::create_dir`
+pub fn ensure_environment(ap: &AbsoltuePaths, debug_mode: &bool) -> io::Result<()>{
+    if *debug_mode {
+        fs::create_dir(&ap.project)?
+    }
+    Ok(())
+}