auto-patchelf: add IgnoredDependency event

This logs when there was a missing dependency that was matched by an
ignore pattern.

The test case is extended to also check for having the IgnoredDependency
events in the structured log output.

pkgs/by-name/au/auto-patchelf/source/auto-patchelf.py

@@ -256,6 +256,15 @@ class SetInterpreter:
         return f"setting interpreter of {self.file}"
 
 
+@dataclass
+class IgnoredDependency:
+    file: Path                          # The file that contains the ignored dependency
+    name: Path                          # The name of the dependency
+    pattern: str                        # The pattern that caused this missing dep to be ignored
+
+    def to_human_readable_str(self) -> str:
+        return f"warn: auto-patchelf ignoring missing {self.name} wanted by {self.file}"
+
 @dataclass
 class Dependency:
     file: Path                          # The file that contains the dependency
@@ -464,7 +473,7 @@ def auto_patchelf(
     for dep in missing:
         for pattern in ignore_missing:
             if fnmatch(dep.name.name, pattern):
-                logger.debug(f"warn: auto-patchelf ignoring missing {dep.name} wanted by {dep.file}")
+                logger.log(IgnoredDependency(file=dep.file, name=dep.name, pattern=pattern))
                 break
         else:
             logger.debug(f"error: auto-patchelf could not satisfy dependency {dep.name} wanted by {dep.file}")

pkgs/test/auto-patchelf-structured-log/default.nix

@@ -31,7 +31,8 @@ stdenv.mkDerivation {
     auto-patchelf \
       --paths ./usr/bin/ToneLib-Jam \
       --libs ${lib.getLib freetype}/lib \
-      --structured-logs > log.jsonl || true
+      --ignore-missing "libasound.so.*" "libGL.so.*" \
+      --structured-logs | tee log.jsonl
 
     # Expect 1 SetInterpreter line
     jq -e -s '[.[] | select(has("SetInterpreter"))] | length == 1' log.jsonl
@@ -39,13 +40,16 @@ stdenv.mkDerivation {
     # We expect 3 Dependency lines
     jq -e -s '[.[] | select(has("Dependency"))] | length == 3' log.jsonl
 
-    # Expect the last line to set the rpath as expected
-    jq -e -s 'last == {
+    # We expect 2 IgnoredDependency lines
+    jq -e -s '[.[] | select(has("IgnoredDependency"))] | length == 2' log.jsonl
+
+    # Expect there to be a SetRpath event using the expected rpath
+    jq -e -s 'any(.[]; . == {
       "SetRpath": {
         "file": "usr/bin/ToneLib-Jam",
         "rpath": "${lib.getLib freetype}/lib"
       }
-    }' log.jsonl
+    })' log.jsonl
 
     cp log.jsonl $out
   '';