new: full implementation of remove and install functions

src/package/depend.c

@@ -124,3 +124,18 @@ bool lm_package_depend_fromstr(lm_pkg_t *pkg, char *buffer){
 
   return true;
 }
+
+bool lm_package_depends(lm_pkg_t *pkg, char *dep){
+  if(NULL == pkg || NULL == dep){
+    lm_error_set(LM_ERR_ArgNULL);
+    return false;
+  }
+
+  if(NULL == pkg->depends)
+    return false;
+
+  for(int i = 0; pkg->depends[i] != NULL; i++)
+    if(eq(pkg->depends[i], dep))
+      return true;
+  return false;
+}