How can I fix a missing blob in Git?

Question

Because I've been rsyncing my Git repository between various places, I'm now stuck with a broken Git repository. When I do `git log` I get a correct history, but when I do `git status` I get ``` fatal: unable to read 563e4c9abcd4114e08255db989f0f53426bdeff7 ``` So after some searching around I tried `git fsck`: ``` Checking object directories: 100% (256/256), done. missing blob 33244941016301570dccdcdc95e543910109d0a8 dangling blob 59f44441e6437ebc4d40182eb8a10d3e07fe367b missing blob 5dc8ab1804acb58fc658bcd6152fbb246290c8ae dangling blob 698c775f2599fad3d09906dead4dc67743a984bd dangling blob 922003b8433bcad6ce9778a37628d738faa26389 dangling blob c33c0528bfee55b04d99de4580da49de4413329b dangling blob e5107c118bde0edbe5dfb994cb6a50d235c3f06b dangling blob 437573e539572454cb868ca5a0f5074b96d777ac missing blob 468d1856336eaa1ce8006f38ce779c0d997c8d48 dangling blob 6fc9c88708d7d5ca455e68781472bdea119997eb dangling blob 7225d0147fa566369ba3024324b527a7adeac094 dangling blob bb8125d15579fcf…

Accepted Answer

I got a "missing blob" after trying to fix "object file is empty" error (actually I ended up with object file `.git/objects/f7/880aa1d1a76bfff73f3d602e15b4bc829d6a07` removed from the file system).

In order to solve the issue I followed these steps:

Use the Bash script found here in order to detect a commit containing this missing blob. Put it in the repository's root directory with the `find.sh` name:

```
#!/bin/sh
obj_name="$1"
shift
git log "$@" --pretty=format:'%T %h %s' \
| while read tree commit subject ; do
    if git ls-tree -r $tree | grep -q "$obj_name" ; then
        echo $commit "$subject"
    fi
done
```

And then run it, passing the SHA-1 hash of the missing blob as the argument:

```
./find.sh f7880aa1d1a76bfff73f3d602e15b4bc829d6a07

629afc4 ESLint warning in layers' configuration file is fixed.
```

`629afc4` is part of the commit's SHA-1 (it was a last commit I tried to push to remote repository).

Find a file associated with this blob:

```
git ls-tree -r 629afc4 | grep f7880aa1d1a76bfff73f3d602e15b4bc829d6a07

100644 blob f7880aa1d1a76bfff73f3d602e15b4bc829d6a07    src/config/layers.js
```

It's `src/config/layers.js` in my case.

Check whether hash of the file matches the hash in Git tree:

```
git hash-object src/config/layers.js

f7880aa1d1a76bfff73f3d602e15b4bc829d6a07
```

If so then we can write file contents to the blob:

```
git hash-object -w src/config/layers.js
```

Doing these steps helped me to remove the error and fix a broken local repository. The solution is found in this article.

How can I fix a missing blob in Git?

Solution

Problem

Related problems