added library (static and dynamic) capability

src/build_rule.rs

@@ -1,10 +1,10 @@
 use std::{path::PathBuf, fs};
-use crate::ARGS;
 
 use path_clean::PathClean;
 use regex::Regex;
 
 use crate::makefile::*;
+use crate::ARGS;
 
 #[derive(Debug)]
 #[allow(dead_code)]
@@ -106,7 +106,15 @@ impl ToString for BuildRuleKind<BuildRule> {
                 command_prefix = "\t@";
                 let verb = match self {
                     BuildRuleKind::Object(_) => "Building",
-                    BuildRuleKind::Target(_) => "Linking",
+                    BuildRuleKind::Target(_) => {
+                        if args.static_library {
+                            "Creating static library"
+                        } else if args.dynamic_library {
+                            "Creating dynamic library"
+                        } else {
+                            "Linking"
+                        }
+                    },
                     BuildRuleKind::Directory(_) => "Creating directory",
                     BuildRuleKind::Convenience(_) => {
                         special = true;

src/main.rs

@@ -37,7 +37,14 @@ struct Args {
 thread_local! {static ARGS: Args = Args::parse()}
 
 fn main() {
-
+    ARGS.with(|args| {
+        if args.dynamic_library && args.static_library {
+            panic!("error: you must either a static library or a dynamic library, not both");
+        }
+        if args.run && (args.dynamic_library || args.static_library) {
+            panic!("error: you cannot run a library");
+        }
+    });
     let mut makefile_name = String::new();
     ARGS.with(|args| {
         makefile_name.push_str(&args.makefile);
@@ -72,7 +79,11 @@ fn main() {
         generated_content.push_str("\n");
     }
 
-
+    ARGS.with(|args| {
+        if args.dynamic_library {
+            generated_content.push_str("# dynamic library\nCFLAGS += -fPIC\nLDFLAGS += -shared\n\n");
+        } else {}
+    });
 
     rule_list.add_target_rule();
 

src/rule_list.rs

@@ -3,6 +3,7 @@ use std::fs::DirEntry;
 
 use crate::build_rule::*;
 use crate::makefile::*;
+use crate::ARGS;
 
 #[derive(Debug)]
 pub struct RuleList(pub Vec<BuildRuleKind<BuildRule>>);
@@ -59,9 +60,18 @@ impl RuleList {
 
     pub fn add_target_rule(&mut self) {
         let mut objects = self.get_obj_targets();
-        let target_comm = String::from(
+        let mut target_comm = String::new();
+        ARGS.with(|args| {
+            if args.static_library {
+                target_comm = String::from(
+                    format!("$(AR) $(ARFLAGS) $(BUILDDIR)/$(TARGET) {}", objects.join(" "))
+                );
+            } else {
+                target_comm = String::from(
                     format!("$(CC) $(LDFLAGS) $(INCS) -o $(BUILDDIR)/$(TARGET) {} $(LDLIBS)", objects.join(" "))
                 );
+            }
+        });
 
         objects.push(String::from("| $(OBJDIR) $(BUILDDIR)"));
         let prereqs = objects;