chore: move format-audit-result.jq out of //users/sterni

In the spirit of the readTree filter we should also not include files in
user directories from the outside.

Change-Id: I1abe36a721048900d2758b5986063b68b8d1af93
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5200
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI

tools/rust-crates-advisory/OWNERS

@@ -1,3 +1,4 @@
 inherited: true
 owners:
   - Profpatsch
+  - sterni

tools/rust-crates-advisory/default.nix

@@ -176,7 +176,7 @@ let
       "maintainers"
       ""
       "-f"
-      ../../users/sterni/nixpkgs-crate-holes/format-audit-result.jq
+      ./format-audit-result.jq
     ]
     "if"
     [ depot.tools.eprintf "%s\n" "$report" ]

tools/rust-crates-advisory/format-audit-result.jq

@@ -0,0 +1,73 @@
+# This is a jq script to format the JSON output of cargo-audit into a short
+# markdown report for humans. It is used by //users/sterni/nixpkgs-crate-holes
+# and //tools/rust-crates-advisory:check-all-our-lock-files which will provide
+# you with example invocations.
+#
+# It needs the following arguments passed to it:
+#
+# - maintainers: Either the empty string or a list of maintainers to @mention
+#   for the current lock file.
+# - attr: An attribute name (or otherwise unique identifier) to associate the
+#   report for the current lock file with.
+
+# Link to human-readable advisory info for a given vulnerability
+def link:
+  [ "https://rustsec.org/advisories/", .advisory.id, ".html" ] | add;
+
+# Format a list of version constraints
+def version_list:
+  [ .[] | "`" + . + "`" ] | join("; ");
+
+# show paths to fixing this vulnerability:
+#
+# - if there are patched releases, show them (the version we are using presumably
+#   predates the vulnerability discovery, so we likely want to upgrade to a
+#   patched release).
+# - if there are no patched releases, show the unaffected versions (in case we
+#   want to downgrade).
+# - otherwise we state that no unaffected versions are available at this time.
+#
+# This logic should be useful, but is slightly dumber than cargo-audit's
+# suggestion when using the non-JSON output.
+def patched:
+  if .versions.patched == [] then
+    if .versions.unaffected != [] then
+       "unaffected: " + (.versions.unaffected | version_list)
+    else
+      "no unaffected version available"
+    end
+  else
+    "patched: " + (.versions.patched | version_list)
+  end;
+
+# if the vulnerability has aliases (like CVE-*) emit them in parens
+def aliases:
+  if .advisory.aliases == [] then
+    ""
+  else
+    [ " (", (.advisory.aliases | join(", ")), ")" ] | add
+  end;
+
+# each vulnerability is rendered as a (normal) sublist item
+def format_vulnerability:
+  [ "  - "
+  , .package.name, " ", .package.version, ": "
+  , "[", .advisory.id, "](", link, ")"
+  , aliases
+  , ", ", patched
+  , "\n"
+  ] | add;
+
+# be quiet if no found vulnerabilities, otherwise render a GHFM checklist item
+if .vulnerabilities.found | not then
+  ""
+else
+  ([ "- [ ] "
+   , "`", $attr, "`: "
+   , (.vulnerabilities.count | tostring)
+   , " vulnerabilities in Cargo.lock"
+   , if $maintainers != "" then " (cc " + $maintainers + ")" else "" end
+   , "\n"
+   ] + (.vulnerabilities.list | map(format_vulnerability))
+  ) | add
+end