symlink compilers into views

Author: bcumming

stackinator/etc/envvars.py

@@ -434,6 +434,11 @@ def view_impl(args):
         print(f"error - activation script {activate_path} does not exist")
         exit(1)
 
+    bin_path = os.path.join(root_path, "bin")
+    # ensure that the bin path exists
+    if not os.path.exists(bin_path):
+        os.makedirs(bin_path)
+
     envvars = read_activation_script(activate_path)
 
     # force all prefix path style variables (list vars) to use PREPEND the first operation.
@@ -456,13 +461,15 @@ def view_impl(args):
                     if c is not None:
                         compilers.append(c)
 
-        compiler_paths = []
         for c in compilers:
-            local_paths = set([os.path.dirname(v) for _, v in c.items() if v is not None])
-            compiler_paths += local_paths
-            print(f"adding compiler {c} -> {[p for p in local_paths]}")
-
-        envvars.set_list("PATH", compiler_paths, EnvVarOp.PREPEND)
+            source_paths = list(set([os.path.abspath(v) for _, v in c.items() if v is not None]))
+            target_paths = [os.path.join(bin_path, os.path.basename(f)) for f in source_paths]
+            for src, dst in zip(source_paths, target_paths):
+                print(f"creating compiler symlink: {src} -> {dst}")
+                if os.path.exists(dst):
+                    print(f"  first removing {dst}")
+                    os.remove(dst)
+                os.symlink(src, dst)
 
     if args.prefix_paths:
         # get the root path of the env