Add 'rules/' from commit 'd44be66f2a916168e0f5a7055e49f12c252b2cd2'

git-subtree-dir: rules
git-subtree-mainline: 247e09b1ba01deb5649c6a73a7f272e1f72178fe
git-subtree-split: d44be66f2a916168e0f5a7055e49f12c252b2cd2

1 files changed, 139 insertions, 0 deletions

diff --git a/rules/patch/RULES b/rules/patch/RULES
new file mode 100644
index 0000000..bba83c2
--- /dev/null
+++ b/rules/patch/RULES
@@ -0,0 +1,139 @@
+{ "file":
+  { "doc": ["Replace a file, logically in place, by a patched version"]
+  , "target_fields": ["src", "patch"]
+  , "string_fields": ["patch-part"]
+  , "config_vars": ["PATCH", "ENV"]
+  , "field_doc":
+    { "src":
+      ["The single source file to patch, typically an explict file reference."]
+    , "patch": ["The patch to apply."]
+    , "patch-part":
+      [ "If the patch contains hunks for multiple files, only apply hunks for"
+      , "the specified file path. Individual directory components are joined"
+      , "with \"/\". Note that the patch must be provided in unified format."
+      ]
+    }
+  , "artifacts_doc":
+    ["The patched file, staged to the position the of the original file"]
+  , "runfiles_doc": ["Same as artifacts"]
+  , "imports":
+    { "stage_field": ["./", "..", "stage_singleton_field"]
+    , "stage_artifact": ["./", "..", "stage_artifact_to_singleton_field"]
+    }
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "orig"
+        , { "type": "let*"
+          , "bindings": [["fieldname", "src"], ["location", "orig"]]
+          , "body": {"type": "CALL_EXPRESSION", "name": "stage_field"}
+          }
+        ]
+      , [ "patch"
+        , { "type": "let*"
+          , "bindings": [["fieldname", "patch"], ["location", "patch"]]
+          , "body": {"type": "CALL_EXPRESSION", "name": "stage_field"}
+          }
+        ]
+      , [ "patch-part"
+        , { "type": "join"
+          , "separator": "\\/"
+          , "$1": {"type": "FIELD", "name": "patch-part"}
+          }
+        ]
+      , [ "splitpatch"
+        , { "type": "BLOB"
+          , "data":
+            { "type": "join"
+            , "separator": "\n"
+            , "$1":
+              [ "set -e"
+              , { "type": "join"
+                , "$1":
+                  [ { "type": "join_cmd"
+                    , "$1":
+                      [ "sed"
+                      , "-n"
+                      , { "type": "join"
+                        , "$1":
+                          [ "/^--- "
+                          , {"type": "var", "name": "patch-part"}
+                          , "/,"
+                          , "/^[^-+@\\ ]\\|^---\\ /p"
+                          ]
+                        }
+                      ]
+                    }
+                  , " $1 | sed '$d' > patch"
+                  ]
+                }
+              ]
+            }
+          }
+        ]
+      , [ "patch"
+        , { "type": "if"
+          , "cond": {"type": "var", "name": "patch-part"}
+          , "then":
+            { "type": "ACTION"
+            , "inputs":
+              { "type": "map_union"
+              , "$1":
+                [ { "type": "to_subdir"
+                  , "subdir": "in"
+                  , "$1": {"type": "var", "name": "patch"}
+                  }
+                , { "type": "singleton_map"
+                  , "key": "splitpatch"
+                  , "value": {"type": "var", "name": "splitpatch"}
+                  }
+                ]
+              }
+            , "outs": ["patch"]
+            , "cmd": ["sh", "./splitpatch", "in/patch"]
+            , "env":
+              {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
+            }
+          , "else": {"type": "var", "name": "patch"}
+          }
+        ]
+      , [ "inputs"
+        , { "type": "map_union"
+          , "$1":
+            [{"type": "var", "name": "orig"}, {"type": "var", "name": "patch"}]
+          }
+        ]
+      , [ "patched"
+        , { "type": "ACTION"
+          , "inputs": {"type": "var", "name": "inputs"}
+          , "outs": ["patched"]
+          , "cmd":
+            [ {"type": "var", "name": "PATCH", "default": "patch"}
+            , "-s"
+            , "--read-only=ignore"
+            , "--follow-symlinks"
+            , "-o"
+            , "patched"
+            , "orig"
+            , "patch"
+            ]
+          }
+        ]
+      , [ "result"
+        , { "type": "let*"
+          , "bindings":
+            [ ["artifact", {"type": "var", "name": "patched"}]
+            , ["fieldname", "src"]
+            ]
+          , "body": {"type": "CALL_EXPRESSION", "name": "stage_artifact"}
+          }
+        ]
+      ]
+    , "body":
+      { "type": "RESULT"
+      , "artifacts": {"type": "var", "name": "result"}
+      , "runfiles": {"type": "var", "name": "result"}
+      }
+    }
+  }
+}