first test can instantiate an Index on the new fixture (#16)

Note that the remote-check has been removed to support all kinds of
indices.

Change-checks will fail later should it not be in the correct format
or an unrelated repo, so it should be fine.

Author: Byron

src/index/init.rs

@@ -75,19 +75,6 @@ impl Index {
             }
         })?;
 
-        if repo_did_exist {
-            let remote = repo.find_remote("origin")?;
-            let actual_remote_url = remote.url().ok_or_else(|| {
-                git2::Error::from_str("did not obtain URL of remote named 'origin'")
-            })?;
-            if actual_remote_url != repository_url {
-                return Err(git2::Error::from_str(&format!(
-                    "Actual 'origin' remote url {:#?} did not match desired one at {:#?}",
-                    actual_remote_url, repository_url
-                )));
-            }
-        }
-
         Ok(Index {
             repo,
             seen_ref_name: LAST_SEEN_REFNAME,

tests/fixtures/generated-archives/make-index-from-parts.tar.xz

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:77d8b1e3bd00d2ca3f136362a84f0a76bbefa8dc988e74287fae3bc50f949898
+size 855244

tests/fixtures/make-index-from-parts.sh

@@ -5,14 +5,20 @@ set -eu -o pipefail
 parts="${1:?first argument is the repoitory root}/tests/fixtures/index-parts"
 commit_list=$parts/commit.list
 
-git init
-tar -x < $parts/init.*.tar
-git add . && git commit -m "initial commit"
+mkdir worktree
+(cd worktree
+  git init
+  tar -x < $parts/init.*.tar
+  git add . && git commit -m "initial commit"
 
 
-while read -r commit; do
-    patch -p1 < "$parts/$commit.diff"
-    git add .
-    git commit -F "$parts/$commit.msg"
-done < "$commit_list"
-git gc
+  while read -r commit; do
+      patch -p1 < "$parts/$commit.diff"
+      git add .
+      git commit -F "$parts/$commit.msg"
+  done < "$commit_list"
+  git gc
+)
+
+git clone --bare --no-local ./worktree base
+git clone --bare ./worktree clone

tests/index/mod.rs

@@ -18,5 +18,5 @@ fn index_ro() -> Index {
             .map(|p| p.to_str().unwrap().to_owned()),
     )
     .unwrap();
-    Index::from_path_or_cloned(dir).unwrap()
+    Index::from_path_or_cloned(dir.join("base")).unwrap()
 }