mix_package
Synthetic vendored package generated from a locked Mix dependency graph.
Description
mix_package is emitted by mix_dependencies; it is not intended for manual declaration. Each target represents one Mix application and carries the exact version, source identity, checksums, repository, and Git revision available in mix.lock.
The target runs the compiler pipeline registered by the vendored Mix project. Dependency bytecode paths are declared inputs, Hex runs in offline mode, and the package writes its application bytecode into a target-owned build directory. Private application files are copied into a separate declared output.
Only the Mix build manager is accepted today. A Rebar manager, Make manager, or custom dependency compile command fails before actions are declared. This prevents Once from silently compiling a package with the wrong semantics.
Resolver-Owned Attributes
| Attribute | Type | Meaning |
|---|---|---|
_mix_locked | bool | Proves the target was generated with locked identity data |
_mix_package_name | string | Hex registry package name |
_mix_source | string | Stable Hex or Git source identity |
_mix_checksum | string | Hex package checksum |
_mix_outer_checksum | string | Hex registry checksum |
_mix_revision | string | Locked Git revision |
_mix_repository | string | Hex repository or Git repository identity |
_mix_managers | list<string> | Build managers reported by Mix and the lockfile |
_mix_custom_compile | bool | Whether the dependency overrides its compile command |
_mix_source_root | string | Package-relative vendored source root |
_mix_manifest | string | Root Mix manifest used during resolution |
_mix_lockfile | string | Root authoritative lockfile |
The target also receives the application metadata attributes shared with elixir_library, including app_name, version, and mix_env.
Dependency Edges
| Edge | Accepts | Description |
|---|---|---|
deps | elixir_app | Locked package dependencies reported by Mix |
Providers
The target emits elixir_app.
Provider Record
| Field | Type | Meaning |
|---|---|---|
app_name | string | Mix application name |
package_name | string | Registry package name |
version | string | Locked package version or Git revision |
source | string | Stable locked source identity |
checksum | string | Hex package checksum when present |
outer_checksum | string | Hex registry checksum when present |
revision | string | Git revision when present |
repository | string | Hex repository or Git repository |
managers | list<string> | Native build manager metadata |
ebin_dir | string | Compiled application bytecode directory |
priv_dir | string | Private application output directory |
transitive_elixir_apps | list<record> | This package plus reachable package applications |
transitive_sources | list<string> | Vendored sources for this package and its dependencies |
Capabilities
| Capability | Output groups |
|---|---|
build | bytecode |
Sources
- Mix compilation defines the registered compiler pipeline used by Mix projects.
- Mix project configuration documents build paths, dependency paths, lockfiles, and project compilers.