修改了一下默认路径

src/config.rs

@@ -1,5 +1,6 @@
 use std::fmt::Display;
 use std::path::PathBuf;
+use std::str::FromStr;
 
 pub const HELP_MESSAGE: &str = r#"call [options] [--] [arguments]
 Options:
@@ -10,6 +11,10 @@ Options:
     --bin=xxx   Specify executable file
     --config=xxx Specify configuration file
     --help      Print this help message
+Defaults:
+    hide console
+    chdir ./lib
+    run ./main   
 "#;
 
 #[derive(Clone)]
@@ -17,7 +22,7 @@ pub struct Config {
     pub show_console: bool,
     pub chdir: Option<PathBuf>,
     pub bin: PathBuf,
-    pub config: Option<String>,
+    pub config: Option<PathBuf>,
     pub bin_arg: Vec<String>,
 }
 
@@ -36,12 +41,92 @@ impl Display for Config {
 }
 
 impl Config {
-    pub fn from_cli() -> Option<Config> {
+    pub fn new(
+        show_console: bool,
+        chdir: Option<PathBuf>,
+        bin: PathBuf,
+        config: Option<PathBuf>,
+        bin_arg: Vec<String>,
+    ) -> Self {
+        Config {
+            show_console,
+            chdir,
+            bin,
+            config,
+            bin_arg,
+        }
+    }
+    pub fn merge_from(&mut self, other: &Config) {
+        if other.show_console {
+            self.show_console = true;
+        }
+        if other.chdir.is_some() {
+            self.chdir = other.chdir.clone();
+        }
+        if other.bin != PathBuf::from("./lib/main") {
+            self.bin = other.bin.clone();
+        }
+        if other.config.is_some() {
+            self.config = other.config.clone();
+        }
+        if !other.bin_arg.is_empty() {
+            self.bin_arg = other.bin_arg.clone();
+        }
+    }
+    pub fn from_config(config_path: Option<PathBuf>) -> Option<Self> {
+        if config_path.is_none() {
+            // 判断一下 ./run.conf 是否存在
+            let config_path = PathBuf::from("./run.conf");
+            if config_path.exists() {
+                return Self::from_config(Some(config_path));
+            }
+            return None;
+        }
+        let config_path = config_path.unwrap();
+        if !config_path.exists() {
+            return None;
+        }
+        let config_str = std::fs::read_to_string(config_path).unwrap();
         let mut show_console = false;
         let mut chdir: Option<String> = None;
         let mut bin: Option<String> = None;
-        let dir: Option<String> = None;
-        let mut config: Option<String> = None;
+        let mut arg: Option<String> = None;
+        for line in config_str.lines() {
+            if line.starts_with("#") {
+                continue;
+            }
+            let mut iter = line.splitn(2, "=");
+            let key = iter.next().unwrap();
+            let value = iter.next().unwrap();
+            if key == "show_console" {
+                show_console = value == "true";
+            } else if key == "chdir" {
+                chdir = Some(value.to_string());
+            } else if key == "bin" {
+                bin = Some(value.to_string());
+            } else if key == "arg" {
+                arg = Some(value.to_string());
+            }
+        }
+        // 处理一下 bin
+        let bin = if let Some(bin) = bin {
+            PathBuf::from(bin)
+        } else {
+            PathBuf::from("./lib/main")
+        };
+        let chdir = chdir.map(|x| PathBuf::from(x));
+        let arg = if let Some(arg) = arg {
+            vec![arg]
+        } else {
+            Vec::new()
+        };
+        Some(Self::new(show_console, chdir, bin, None, arg))
+    }
+    pub fn from_cli() -> Option<Self> {
+        let mut show_console = false;
+        let mut chdir: Option<String> = None;
+        let mut bin: Option<String> = None;
+        let mut config: Option<PathBuf> = None;
         // -- 表示后面的参数都是可执行文件的参数
         let args: Vec<String> = std::env::args().collect();
         // 先检查有没有 --help
@@ -78,22 +163,27 @@ impl Config {
             } else if args[i].starts_with("--bin=") {
                 bin = Some(args[i][6..].to_string());
             } else if args[i].starts_with("--config=") {
-                config = Some(args[i][9..].to_string());
+                config = Some(PathBuf::from_str(&args[i][9..]).unwrap());
             }
         }
-        // 拼接上 dir
-        let bin = if let Some(dir) = dir {
-            PathBuf::from(dir).join(bin.unwrap_or("main".to_string()))
+        // 处理一下 bin
+        let bin = if let Some(bin) = bin {
+            PathBuf::from(bin)
         } else {
-            PathBuf::from(bin.unwrap_or("./lib/main".to_string()))
+            PathBuf::from("./main")
         };
-        let chdir = chdir.map(|x| PathBuf::from(x));
-        Some(Config {
-            show_console,
-            chdir,
-            bin,
-            config,
-            bin_arg,
-        })
+        // 默认为 chdir ./lib
+        let chdir = if let Some(chdir) = chdir {
+            Some(PathBuf::from(chdir))
+        } else {
+            Some(PathBuf::from("./lib"))
+        };
+
+        let mut conf = Self::new(show_console, chdir, bin, config, bin_arg);
+        let conf_from_config = Self::from_config(conf.config.clone());
+        if conf_from_config.is_some() {
+            conf.merge_from(&conf_from_config.unwrap());
+        }
+        Some(conf)
     }
 }