Support tmp dir to place binaries

2 files changed, 20 insertions, 0 deletions

diff --git a/src/backends/mod.rs b/src/backends/mod.rs
index f24a162..82ec6a7 100644
--- a/src/backends/mod.rs
+++ b/src/backends/mod.rs
@@ -1,4 +1,6 @@
 use std::path::{ Path, PathBuf };
+use std::env::temp_dir;
+use lazy_static::lazy_static;
 
 pub mod python;
 pub mod clang;
@@ -6,6 +8,10 @@ pub mod clang;
 pub use python::PythonBackend;
 pub use clang::ClangBackend;
 
+lazy_static! {
+    static ref EVR_TMP_DIR: PathBuf = temp_dir().join("evr-tmp");
+}
+
 pub trait Backend {
     fn get_template(&self) -> Option<&str>;
 
@@ -19,3 +25,15 @@ pub trait Backend {
         None
     }
 }
+
+fn mk_tmp_dir() -> std::io::Result<&'static std::path::PathBuf> {
+    if !EVR_TMP_DIR.exists() {
+        std::fs::create_dir(&*EVR_TMP_DIR)?;
+    } else {
+        if !EVR_TMP_DIR.is_dir() {
+            return Err(std::io::Error::new(std::io::ErrorKind::AlreadyExists,
+                "tmp dir already exists and not a directory"))
+        }
+    }
+    Ok(&*EVR_TMP_DIR)
+}
diff --git a/src/main.rs b/src/main.rs
index 0e97682..589cae2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+extern crate lazy_static;
+
 use clap::AppSettings;
 use structopt::StructOpt;
 use env_logger;