From 161772df4241adefd2ff3440f00ee72d13987bf8 Mon Sep 17 00:00:00 2001
From: Oliver Reiche <oliver.reiche@huawei.com>
Date: Fri, 21 Jul 2023 15:20:51 +0200
Subject: rules: Propagate PATH list from defaults

... instead of creating an ENV from it and propagating this.
The idea is to keep PATH entries separate and only join them
with ":" when we need it. In this way, we can accumulate
PATHs from multiple defaults later, and perform a
deduplication ("nub_left") to shorten the final string
length.
---
 CC/auto/RULES | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'CC/auto')

diff --git a/CC/auto/RULES b/CC/auto/RULES
index 247ee01..0e156c9 100644
--- a/CC/auto/RULES
+++ b/CC/auto/RULES
@@ -156,6 +156,7 @@
     , "flags-cc": ["./", "..", "flags-cc"]
     , "flags-cxx": ["./", "..", "flags-cxx"]
     , "default-ENV": ["./", "..", "default-ENV"]
+    , "default-PATH": ["./", "..", "default-PATH"]
     , "default-TOOLCHAIN": ["./", "..", "default-TOOLCHAIN"]
     , "default-NON_SYSTEM_TOOLS": ["./", "..", "default-NON_SYSTEM_TOOLS"]
     }
@@ -222,6 +223,36 @@
             ]
           }
         ]
+      , [ "ENV_PATH"
+        , { "type": "lookup"
+          , "map": {"type": "var", "name": "ENV"}
+          , "key": "PATH"
+          }
+        ]
+      , [ "ENV"
+        , { "type": "map_union"
+          , "$1":
+            [ {"type": "var", "name": "ENV"}
+            , { "type": "singleton_map"
+              , "key": "PATH"
+              , "value":
+                { "type": "join"
+                , "separator": ":"
+                , "$1":
+                  { "type": "++"
+                  , "$1":
+                    [ {"type": "CALL_EXPRESSION", "name": "default-PATH"}
+                    , { "type": "if"
+                      , "cond": {"type": "var", "name": "ENV_PATH"}
+                      , "then": [{"type": "var", "name": "ENV_PATH"}]
+                      }
+                    ]
+                  }
+                }
+              }
+            ]
+          }
+        ]
       , [ "c.flags"
         , { "type": "BLOB"
           , "data":
-- 
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