EXP: try getting standalone manifests working in Rust core

src/core/src/collection.rs

@@ -209,12 +209,40 @@
     }
 
     pub fn sig_from_record(&self, record: &Record) -> Result<SigStore> {
+        eprintln!("fetching: {:?}", record);
         let match_path = record.internal_location().as_str();
         let selection = Selection::from_record(record)?;
         let sig = self.storage.load_sig(match_path)?.select(&selection)?;
         assert_eq!(sig.signatures.len(), 1);
         Ok(sig)
     }
+
+    pub fn sig_from_record2(&self, record: &Record) -> Result<SigStore> {
+        eprintln!("fetching: {:?}", record);
+        let match_path = record.internal_location().as_str();
+        Ok(match match_path {
+            x if x.ends_with(".sig") || x.ends_with(".sig.gz") => {
+                let selection = Selection::from_record(record)?;
+                let sig = self.storage.load_sig(x)?.select(&selection)?;
+                assert_eq!(sig.signatures.len(), 1);
+                sig
+            }
+            x if x.ends_with(".zip") => {
+                let zipcoll = Collection::from_zipfile(x)?;
+
+                let ziprec = zipcoll.manifest().iter().find(|r| {
+                    r.md5() == record.md5() && r.name() == record.name()
+                }).unwrap();
+                eprintln!("ziprec: {}", ziprec.md5());
+
+                let sig = zipcoll.sig_from_record(ziprec)?;
+                sig
+
+//                todo!("more zip better")
+            }
+            _ => todo!("unknown, dying now")
+        })
+    }
 }
 
 impl Select for Collection {
@@ -236,7 +264,7 @@
     use crate::prelude::Select;
     use crate::selection::Selection;
     use crate::signature::Signature;
     use crate::Result;
 
     #[test]
     fn sigstore_selection_with_downsample() {

src/core/src/index/revindex/mod.rs

@@ -186,7 +186,7 @@ impl RevIndex {
 
     pub fn open<P: AsRef<Path>>(index: P, read_only: bool, spec: Option<&str>) -> Result<Self> {
         let opts = db_options();
-        let cfs = DB::list_cf(&opts, index.as_ref()).unwrap();
+        let cfs = DB::list_cf(&opts, index.as_ref())?;
 
         if cfs.into_iter().any(|c| c == COLORS) {
             // TODO: ColorRevIndex can't be read-only for now,