From cd66b7b4622d0e5e396ef95308d80c7f8f74577e Mon Sep 17 00:00:00 2001
From: Tab Atkins-Bittner <jackalmage@gmail.com>
Date: Thu, 13 Jan 2022 15:18:25 -0800
Subject: [PATCH] Add 'bikeshed debug --print-metadata', to output all the
 parsed metadata. Fixes #2214.

---
 bikeshed/cli.py      | 17 +++++++++++++++++
 bikeshed/metadata.py |  5 +++++
 2 files changed, 22 insertions(+)

diff --git a/bikeshed/cli.py b/bikeshed/cli.py
index c351802d06..02b54528bd 100644
--- a/bikeshed/cli.py
+++ b/bikeshed/cli.py
@@ -300,6 +300,12 @@ def main():
         action="store_true",
         help="Clobbers the readonly data files with the mutable ones.",
     )
+    debugCommands.add_argument(
+        "--print-metadata",
+        dest="printMetadata",
+        action="store_true",
+        help="Prints all the metadata parsed for the spec as JSON. Top-level keys are presented in increasing order of importance; second-level keys are in order of first appearance in each context.",
+    )
 
     refParser = subparsers.add_parser("refs", help="Search Bikeshed's ref database.")
     refParser.add_argument("infile", nargs="?", default=None, help="Path to the source file.")
@@ -554,6 +560,17 @@ def handleDebug(options, extras):
         constants.quiet = 0
         update.updateReadonlyDataFiles()
         warn("Don't forget to bump the version number!")
+    elif options.printMetadata:
+        doc = Spec(inputFilename=options.infile)
+        doc.mdCommandLine = metadata.fromCommandLine(extras)
+        doc.preprocess()
+        md = {
+            "defaults.include": doc.mdDefaults.allData,
+            "computed-metadata.include": doc.mdOverridingDefaults.allData,
+            "document": doc.mdDocument.allData,
+            "command-line": doc.mdCommandLine.allData,
+        }
+        print(json.dumps(md, indent=2, default=getjson))
 
 
 def handleRefs(options, extras):
diff --git a/bikeshed/metadata.py b/bikeshed/metadata.py
index 1f3c7cc66d..4931d765bb 100644
--- a/bikeshed/metadata.py
+++ b/bikeshed/metadata.py
@@ -33,6 +33,9 @@ def displayVshortname(self):
     def __init__(self):
         self.hasMetadata = False
 
+        # All metadata ever passed to .addData()
+        self.allData = defaultdict(list)
+
         # required metadata
         self.abstract = []
         self.ED = None
@@ -139,12 +142,14 @@ def addData(self, key, val, lineNum=None):
                 val = val.strip()
 
         if key.startswith("!"):
+            self.allData[key].append(val)
             key = key[1:]
             self.otherMetadata[key].append(val)
             return
 
         if key not in ("ED", "TR", "URL"):
             key = key.title()
+        self.allData[key].append(val)
 
         if key not in knownKeys:
             die(f'Unknown metadata key "{key}". Prefix custom keys with "!".', lineNum=lineNum)