Discover other than default target dirs (#69)

* Discover other than default target dirs

src/paths.rs

@@ -1,6 +1,9 @@
 //! Paths utils.
 
-use std::path::{Path, PathBuf};
+use std::{
+    path::{Path, PathBuf},
+    process::Command,
+};
 
 use convert_case::{Boundary, Case, Casing};
 
@@ -11,11 +14,51 @@ pub fn wasm_file_name(contract_name: &str) -> PathBuf {
 
 /// Returns *.wasm file path in target directory.
 pub fn wasm_path_in_target(contract_name: &str, project_root: PathBuf) -> PathBuf {
+    // extract target dir
+    let target_dir = get_build_target_dir();
     project_root
-        .join("target/wasm32-unknown-unknown/release")
+        .join(format!(
+            "{}/wasm32-unknown-unknown/release",
+            target_dir.display()
+        ))
         .join(wasm_file_name(contract_name))
 }
 
+fn get_build_target_dir() -> PathBuf {
+    let args: Vec<String> = "config get build.target-dir -Z unstable-options"
+        .to_string()
+        .split(' ')
+        .map(|s| s.to_string())
+        .collect();
+    let output = Command::new("cargo").args(args).output();
+
+    if output.is_err() {
+        return PathBuf::from("target");
+    }
+
+    // convert output to string
+    let output_string = String::from_utf8(output.unwrap().stdout);
+
+    if output_string.is_err() {
+        return PathBuf::from("target");
+    }
+
+    let output_string = output_string.unwrap();
+
+    // output is in format build.target-dir = "../target"
+    // convert it to PathBuf
+    let target_dir = output_string.split('=').collect::<Vec<&str>>();
+    let target_dir = target_dir.get(1);
+
+    if target_dir.is_none() {
+        return PathBuf::from("target");
+    }
+
+    let target = target_dir.unwrap().trim().to_string().replace('\"', "");
+
+    PathBuf::from(target)
+}
+
 /// Returns *.wasm file path in wasm directory.
 pub fn wasm_path_in_wasm_dir(contract_name: &str, project_root: &Path) -> PathBuf {
     wasm_dir(project_root).join(wasm_file_name(contract_name))