Unable to install git-delta using --HEAD: No available formula with the name "<hash>--git-delta".

[allanlewis]

brew gist-logs <formula> link OR brew config AND brew doctor output

$ brew config
HOMEBREW_VERSION: 4.2.8-125-ga6d539c
ORIGIN: https://github.com/Homebrew/brew
HEAD: a6d539cf11a0db5a2c0f6fb78ff1ed09bf576a93
Last commit: 2 hours ago
Core tap HEAD: a44bd8e98ffee5f800a1c5c94532892ffdcfe822
Core tap last commit: 3 hours ago
Core tap JSON: 16 Feb 12:15 UTC
Core cask tap HEAD: 6ccea989d283d805b18b2cc0069c3c1ca0aba98f
Core cask tap last commit: 68 minutes ago
Core cask tap JSON: 16 Feb 12:15 UTC
HOMEBREW_PREFIX: /usr/local
HOMEBREW_BOOTSNAP: set
HOMEBREW_CASK_OPTS: []
HOMEBREW_EDITOR: nano
HOMEBREW_MAKE_JOBS: 8
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.1.4 => /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/bin/ruby
CPU: octa-core 64-bit icelake
Clang: 15.0.0 build 1500
Git: 2.43.2 => /usr/local/bin/git
Curl: 8.4.0 => /usr/bin/curl
macOS: 14.3.1-x86_64
CLT: 15.1.0.0.1.1700200546
Xcode: N/A
$ brew doctor
Your system is ready to brew.

Verification

• My "brew doctor output" says Your system is ready to brew. and am still able to reproduce my issue.
• I ran brew update and am still able to reproduce my issue.
• I have resolved all warnings from brew doctor and that did not fix my problem.
• I searched for recent similar issues at https://github.com/Homebrew/homebrew-core/issues?q=is%3Aissue and found no duplicates.

What were you trying to do (and why)?

I want to install the latest git-delta from GitHub to see if an issue I'm having has been resolved since the last release.

What happened (include all command output)?

I get the following output when trying to install git-delta using --HEAD, having unlinked the released version:

Error: No available formula with the name "b9bbfd7106b22cae9c83ca6e70ba2c8e60082fd0dd448dacc5bb7cc7910da326--git-delta".
In formula file: /Users/allanlewis/Library/Caches/Homebrew/downloads/b9bbfd7106b22cae9c83ca6e70ba2c8e60082fd0dd448dacc5bb7cc7910da326--git-delta.rb
Expected to find class B9bbfd7106b22cae9c83ca6e70ba2c8e60082fd0dd448dacc5bb7cc7910da326-GitDelta, but only found: GitDelta.

What did you expect to happen?

I expect the latest git-delta to be installed based on the default branch of its GitHub repository.

Step-by-step reproduction instructions (by running brew commands)

$ brew install git-delta --HEAD
Error: git-delta 0.16.5 is already installed
To install HEAD, first run:
  brew unlink git-delta
$ brew unlink git-delta
Unlinking /usr/local/Cellar/git-delta/0.16.5... 4 symlinks removed.
$ brew install git-delta --HEAD
==> Downloading https://formulae.brew.sh/api/formula.jws.json

==> Downloading https://formulae.brew.sh/api/cask.jws.json

==> Fetching dependencies for git-delta: z3, llvm and rust
==> Fetching z3
==> Downloading https://ghcr.io/v2/homebrew/core/z3/manifests/4.12.5
Already downloaded: /Users/REDACTED/Library/Caches/Homebrew/downloads/8908326288d17da0eaf0e186e59b754b56dc74e079b37038b8edda6a92aff3c8--z3-4.12.5.bottle_manifest.json
==> Downloading https://ghcr.io/v2/homebrew/core/z3/blobs/sha256:b250b89ec1de9431df7d9da9a07491f7059eadcfe345aa3eba0613593bdcc25a
Already downloaded: /Users/REDACTED/Library/Caches/Homebrew/downloads/0f6e116bb7aa5ce0a159e2aa10369cd1d5ace815235921978637c9ef6f6c093d--z3--4.12.5.sonoma.bottle.tar.gz
==> Fetching llvm
==> Downloading https://ghcr.io/v2/homebrew/core/llvm/manifests/17.0.6_1
Already downloaded: /Users/REDACTED/Library/Caches/Homebrew/downloads/31875df61a80d300518ae2279d1e5bf108644d39244dd005559829419130a2ea--llvm-17.0.6_1.bottle_manifest.json
==> Downloading https://ghcr.io/v2/homebrew/core/llvm/blobs/sha256:64bf45f23f2383baa228cb035caa78d659c9d5f8fc23dd1cfbec9aad7be588cc
Already downloaded: /Users/REDACTED/Library/Caches/Homebrew/downloads/713197df0a1499b781c839ed6f26a05f72b11f35af51de67ec057338422ac46c--llvm--17.0.6_1.sonoma.bottle.tar.gz
==> Fetching rust
==> Downloading https://ghcr.io/v2/homebrew/core/rust/manifests/1.76.0
Already downloaded: /Users/REDACTED/Library/Caches/Homebrew/downloads/a7cb7b980db0fadbb731e5df340844453cc2106a025a68c29a607960908efa8d--rust-1.76.0.bottle_manifest.json
==> Downloading https://ghcr.io/v2/homebrew/core/rust/blobs/sha256:1de1aada2510c88922984909316f75e1ab5a47babcfd3cdc59d7aa74f23dab6b
Already downloaded: /Users/REDACTED/Library/Caches/Homebrew/downloads/f6a38becccdfa9e9f785a9ba73dd9564e72f10b7c84fd1a6ec4be27305e47f95--rust--1.76.0.sonoma.bottle.tar.gz
==> Fetching git-delta
==> Downloading https://raw.githubusercontent.com/Homebrew/homebrew-core/a44bd8e98ffee5f800a1c5c94532892ffdcfe822/Formula/g/git-delta.rb
Already downloaded: /Users/REDACTED/Library/Caches/Homebrew/downloads/b9bbfd7106b22cae9c83ca6e70ba2c8e60082fd0dd448dacc5bb7cc7910da326--git-delta.rb
Error: No available formula with the name "b9bbfd7106b22cae9c83ca6e70ba2c8e60082fd0dd448dacc5bb7cc7910da326--git-delta".
In formula file: /Users/REDACTED/Library/Caches/Homebrew/downloads/b9bbfd7106b22cae9c83ca6e70ba2c8e60082fd0dd448dacc5bb7cc7910da326--git-delta.rb
Expected to find class B9bbfd7106b22cae9c83ca6e70ba2c8e60082fd0dd448dacc5bb7cc7910da326-GitDelta, but only found: GitDelta.

[allanlewis]

@MikeMcQuaid thanks for the quick response 🙏

[allanlewis]

I can confirm that brew install git-delta --HEAD now gets past this error; I'd expect any subsequent failures to be a different issue.