Configuration

Resource Configuration

Hex Repository Configuration

In rebar.config:

{hex, [
    {repos, [
        #{name => <<"hexpm">>,
          url => <<"https://repo.hex.pm">>,
          auth_key => {<<"SOME_KEY">>}
        }
    ]}
]}.

Default Hex CDN: https://repo.hex.pm

Environment Variables:

• HEX_CDN: Override Hex CDN URL
• HEX_MIRROR: Alternative to HEX_CDN (for Mix compatibility)

Git Configuration

Authentication:

• SSH: Uses SSH keys from ~/.ssh/
• HTTPS: May prompt for credentials (disabled with GIT_TERMINAL_PROMPT=0)
• Token: Can embed in URL: https://token@github.com/user/repo.git

Git Version Requirements:

• Minimum: 1.8.5 (for locking with -C flag)
• Recommended: 2.3.0+ (for --single-branch optimization)

Cache Directories

Package Cache: ~/.cache/rebar3/hex/REPONAME/packages/

Contents:

• PACKAGE-VERSION.tar: Package tarball
• PACKAGE-VERSION.etag: ETag for cache validation

Environment Variable: REBAR_CACHE_DIR overrides cache location