From 8344340f779d6ee852687626ee6d081cbe7de827 Mon Sep 17 00:00:00 2001
From: Gabriele Musco <gabmus@disroot.org>
Date: Sat, 3 Jun 2023 17:07:55 +0200
Subject: [PATCH] feat: dependency check module

---
 src/depcheck.rs | 63 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/main.rs     |  1 +
 2 files changed, 64 insertions(+)
 create mode 100644 src/depcheck.rs

diff --git a/src/depcheck.rs b/src/depcheck.rs
new file mode 100644
index 0000000..f9e7bd8
--- /dev/null
+++ b/src/depcheck.rs
@@ -0,0 +1,63 @@
+use std::path::Path;
+
+pub enum DepType {
+    SharedObject(String),
+}
+
+pub struct Dependency {
+    pub name: String,
+    pub dep_type: DepType,
+}
+
+fn shared_obj_paths() -> Vec<String> {
+    vec![
+        "/lib".to_string(),
+        "/usr/lib".to_string(),
+        "/usr/local/lib".to_string(),
+        "/usr/lib/x86_64-linux-gnu".to_string(),
+        "/usr/lib/aarch64-linux-gnu".to_string(),
+        "/lib/x86_64-linux-gnu".to_string(),
+        "/lib/aarch64-linux-gnu".to_string(),
+        "/app/lib".to_string(),
+    ]
+}
+
+pub fn check_dependency(dep: Dependency) -> bool {
+    match dep.dep_type {
+        DepType::SharedObject(filename) => {
+            for lib_path in shared_obj_paths() {
+                let path_s = &format!("{lp}/{fn}", lp=lib_path, fn=filename);
+                let path = Path::new(&path_s);
+                if path.is_file() {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{Dependency, DepType, check_dependency};
+
+    #[test]
+    fn can_find_libc() {
+        let libc_dep = Dependency {
+            name: "libc".into(),
+            dep_type: DepType::SharedObject("libc.so".into()),
+        };
+
+        assert!(check_dependency(libc_dep));
+    }
+
+    #[test]
+    fn cannot_find_fake_lib() {
+        let fake_dep = Dependency {
+            name: "fakedep".into(),
+            dep_type: DepType::SharedObject("fakedep.so".into()),
+        };
+
+        assert!(!check_dependency(fake_dep));
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 291d503..7134386 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,6 +8,7 @@ pub mod config;
 pub mod constants;
 pub mod file_utils;
 pub mod profiles;
+pub mod depcheck;
 
 fn main() {
     MainWin::run(Settings::default());