Crate alpm_types

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Types for Arch Linux Package Management.

The provided types and the traits they implement can be used in package management related applications (e.g. package manager, repository manager, special purpose parsers and file specifications, etc.) which deal with libalpm based packages.

This library strives to provide all underlying types for writing ALPM based software as a leaf-crate, so that they can be shared across applications and none of them has to implement them itself.


  • for development version of the crate
  • for released versions of the crate



Known CPU architectures are represented by the Architecture enum. You can create members e.g. from str:

use std::str::FromStr;
use alpm_types::Architecture;

assert_eq!(Architecture::from_str("aarch64"), Ok(Architecture::Aarch64));


Checksums are implemented generically for a set of supported algorithms:

  • Blake2b512
  • Md5 (WARNING: Use of this algorithm is highly discouraged, because it is cryptographically unsafe)
  • Sha1 (WARNING: Use of this algorithm is highly discouraged, because it is cryptographically unsafe)
  • Sha224
  • Sha256
  • Sha384
  • Sha512

NOTE: Contrary to makepkg/pacman, this crate does not support using cksum-style CRC-32 as it is non-standard (different implementations throughout libraries) and cryptographically unsafe.

The above algorithms are reexported in the digests module of this crate, so that users do not have to add the blake2, md-5, sha1, or sha2 crates themselves and can solely rely on alpm-types.

use std::str::FromStr;
use alpm_types::{digests::Blake2b512, Checksum};

let checksum = Checksum::<Blake2b512>::calculate_from("foo\n");

let digest = vec![
    210, 2, 215, 149, 29, 242, 196, 183, 17, 202, 68, 180, 188, 201, 215, 179, 99, 250, 66,
    82, 18, 126, 5, 140, 26, 145, 14, 192, 91, 108, 208, 56, 215, 28, 194, 18, 33, 192, 49,
    192, 53, 159, 153, 62, 116, 107, 7, 245, 150, 92, 248, 197, 195, 116, 106, 88, 51, 122,
    217, 171, 101, 39, 142, 119,
assert_eq!(checksum.inner(), digest);
    format!("{}", checksum),

// create checksum from hex string
let checksum = Checksum::<Blake2b512>::from_str("d202d7951df2c4b711ca44b4bcc9d7b363fa4252127e058c1a910ec05b6cd038d71cc21221c031c0359f993e746b07f5965cf8c5c3746a58337ad9ab65278e77").unwrap();
assert_eq!(checksum.inner(), digest);


The date when a package has been built is represented using the BuildDate struct, which tracks this in seconds since the epoch.

Apart from creating BuildDate from i64 or str, it can also be created from DateTime<Utc>:

use time::OffsetDateTime;
use alpm_types::BuildDate;

let datetime: BuildDate = OffsetDateTime::from_unix_timestamp(1).unwrap().into();
assert_eq!(BuildDate::new(1), datetime);


The options available in a build environment are tracked using BuildEnv:

use alpm_types::BuildEnv;

let option = BuildEnv::new("foo").unwrap();
assert_eq!(option.on(), true);
assert_eq!(, "foo");

A package installed to an environment can be described using Installed:

use alpm_types::Installed;


The options used for packaging are tracked using PackageOption:

use alpm_types::PackageOption;

let option = PackageOption::new("foo").unwrap();
assert_eq!(option.on(), true);
assert_eq!(, "foo");


The compressed size of a package is represented by CompressedSize which tracks the size in bytes and can also be created from str:

use alpm_types::CompressedSize;
use std::str::FromStr;

assert_eq!(CompressedSize::from_str("1"), Ok(CompressedSize(1)));

The installed size of a package is represented by InstalledSize which tracks the size in bytes and can also be created from str:

use alpm_types::InstalledSize;
use std::str::FromStr;

assert_eq!(InstalledSize::from_str("1"), Ok(InstalledSize(1)));


The name for a package is restricted to a specific set of characters. You can create Name directly or from str, which yields a Result:

use std::str::FromStr;
use alpm_types::{Error, Name};

assert_eq!(Name::from_str("test-123@.foo_+"), Name::new("test-123@.foo_+".to_string()));
assert_eq!(Name::from_str(".foo"), Err(Error::InvalidName(".foo".to_string())));


The build directory of a package build environment can be described using BuildDir:

use alpm_types::BuildDir;

let builddir = BuildDir::new("/build").unwrap();
assert_eq!("/build", format!("{}", builddir));

The start directory of a package build environment can be described using StartDir:

use alpm_types::StartDir;

let startdir = StartDir::new("/start").unwrap();
assert_eq!("/start", format!("{}", startdir));


The authors of packages are identified using the Packager type, which describes a User ID (name and valid email):

use std::str::FromStr;
use alpm_types::Packager;

let packager = Packager::new("Foobar McFooface <>").unwrap();
assert_eq!("Foobar McFooface",;

Package types are distinguished using the PkgType enum. Its variants can be constructed from str:

use std::str::FromStr;
use alpm_types::PkgType;

assert_eq!(PkgType::from_str("pkg"), Ok(PkgType::Package));


Sources of a package can be described using Source (which consists of an optional Filename and a SourceLocation):

use alpm_types::{Filename, Source, SourceLocation};

let source = Source::new("foopkg-1.2.3.tar.gz::").unwrap();

assert_eq!(source.filename.unwrap(), Filename::new("foopkg-1.2.3.tar.gz".to_string()).unwrap());
let SourceLocation::Url(url) = source.location else { panic!() };


The version and CPU architecture of a build tool is tracked using BuildToolVer:

use alpm_types::BuildToolVer;

let buildtoolver = BuildToolVer::new("1.0.0-1-any").unwrap();

assert_eq!("1.0.0-1-any", format!("{}", buildtoolver));

Schemas of compound types (e.g. those used to describe .BUILDINFO or .PKGINFO files) need a schema version to version their features. This is what SchemaVersion is for:

use std::str::FromStr;
use alpm_types::SchemaVersion;

let version = SchemaVersion::new("1.0.0").unwrap();

assert_eq!("1.0.0", format!("{}", version));

The handling of package versions is covered by the Version type (which consists of an optional Epoch, Pkgver and an optional Pkgrel). Its vercmp() method implementation is compatible with that of libalpm/pacman’s vercmp.

use std::str::FromStr;
use alpm_types::Version;

let version = Version::new("1.0.0").unwrap();

assert_eq!("1.0.0", format!("{}", version));

let version_a = Version::new("1.0.0").unwrap();
let version_b = Version::new("1.1.0").unwrap();

assert_eq!(Version::vercmp(&version_a, &version_b), -1);

// create a Version that is guaranteed to have a Pkgrel

Version comparisons can be made using VersionComparison and VersionRequirement:

use std::str::FromStr;
use alpm_types::{Version, VersionComparison, VersionRequirement};

let requirement = VersionRequirement::new(">=1.5-1").unwrap();
assert_eq!(requirement.comparison, VersionComparison::GreaterOrEqual);
assert_eq!(requirement.version, Version::new("1.5-1").unwrap());


Please refer to the contribution guidelines to learn how to contribute to this project.


This project is licensed under the terms of the LGPL-3.0-or-later.