Struct Relation

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pub struct Relation(/* private fields */);

Expand description

A node in the syntax tree representing a $ast

Implementations§

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impl Relation

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pub fn new( name: &str, version_constraint: Option<(VersionConstraint, Version)>, ) -> Self

Create a new relation

§Arguments

name - The name of the package
version_constraint - The version constraint and version to use

§Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::VersionConstraint;
let relation = Relation::new("samba", Some((VersionConstraint::GreaterThanEqual, "2.0".parse().unwrap())));
assert_eq!(relation.to_string(), "samba (>= 2.0)");

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pub fn wrap_and_sort(&self) -> Self

Wrap and sort this relation

§Example

use debian_control::lossless::relations::Relation;
let relation = "  samba  (  >= 2.0) ".parse::<Relation>().unwrap();
assert_eq!(relation.wrap_and_sort().to_string(), "samba (>= 2.0)");

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pub fn simple(name: &str) -> Self

Create a new simple relation, without any version constraints.

§Example

use debian_control::lossless::relations::Relation;
let relation = Relation::simple("samba");
assert_eq!(relation.to_string(), "samba");

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pub fn drop_constraint(&mut self) -> bool

Remove the version constraint from the relation.

§Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::VersionConstraint;
let mut relation = Relation::new("samba", Some((VersionConstraint::GreaterThanEqual, "2.0".parse().unwrap())));
relation.drop_constraint();
assert_eq!(relation.to_string(), "samba");

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pub fn name(&self) -> String

Return the name of the package in the relation.

§Example

use debian_control::lossless::relations::Relation;
let relation = Relation::simple("samba");
assert_eq!(relation.name(), "samba");

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pub fn archqual(&self) -> Option<String>

Return the archqual

§Example

use debian_control::lossless::relations::Relation;
let relation: Relation = "samba:any".parse().unwrap();
assert_eq!(relation.archqual(), Some("any".to_string()));

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pub fn set_archqual(&mut self, archqual: &str)

Set the architecture qualifier for this relation.

§Example

use debian_control::lossless::relations::Relation;
let mut relation = Relation::simple("samba");
relation.set_archqual("any");
assert_eq!(relation.to_string(), "samba:any");

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pub fn version(&self) -> Option<(VersionConstraint, Version)>

Return the version constraint and the version it is constrained to.

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pub fn set_version( &mut self, version_constraint: Option<(VersionConstraint, Version)>, )

Set the version constraint for this relation

§Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::VersionConstraint;
let mut relation = Relation::simple("samba");
relation.set_version(Some((VersionConstraint::GreaterThanEqual, "2.0".parse().unwrap())));
assert_eq!(relation.to_string(), "samba (>= 2.0)");

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pub fn architectures(&self) -> Option<impl Iterator<Item = String> + '_>

Return an iterator over the architectures for this relation

§Example

use debian_control::lossless::relations::Relation;
let relation: Relation = "samba [amd64]".parse().unwrap();
assert_eq!(relation.architectures().unwrap().collect::<Vec<_>>(), vec!["amd64".to_string()]);

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pub fn profiles(&self) -> impl Iterator<Item = Vec<BuildProfile>> + '_

Returns an iterator over the build profiles for this relation

§Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::{BuildProfile};
let relation: Relation = "samba <!nocheck>".parse().unwrap();
assert_eq!(relation.profiles().collect::<Vec<_>>(), vec![vec![BuildProfile::Disabled("nocheck".to_string())]]);

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pub fn remove(&mut self)

Remove this relation

§Example

use debian_control::lossless::relations::{Relation,Entry};
let mut entry: Entry = r"python3-dulwich (>= 0.19.0) | python3-urllib3 (<< 1.26.0)".parse().unwrap();
let mut relation = entry.get_relation(0).unwrap();
relation.remove();
assert_eq!(entry.to_string(), "python3-urllib3 (<< 1.26.0)");

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pub fn set_architectures<'a>( &mut self, architectures: impl Iterator<Item = &'a str>, )

Set the architectures for this relation

§Example

use debian_control::lossless::relations::Relation;
let mut relation = Relation::simple("samba");
relation.set_architectures(vec!["amd64", "i386"].into_iter());
assert_eq!(relation.to_string(), "samba [amd64 i386]");

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pub fn add_profile(&mut self, profile: &[BuildProfile])

Add a build profile to this relation

§Example

use debian_control::lossless::relations::Relation;
use debian_control::relations::BuildProfile;
let mut relation = Relation::simple("samba");
relation.add_profile(&[BuildProfile::Disabled("nocheck".to_string())]);
assert_eq!(relation.to_string(), "samba <!nocheck>");

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pub fn build(name: &str) -> RelationBuilder

Build a new relation

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pub fn is_implied_by(&self, outer: &Relation) -> bool

Check if this relation is implied by another relation.

A relation is implied by another if the outer relation is more restrictive or equal to this relation. For example:

pkg >= 1.0 is implied by pkg >= 1.5 (outer is more restrictive)
pkg >= 1.0 is implied by pkg = 1.5 (outer is more restrictive)
pkg (no version) is implied by any versioned constraint on pkg

§Arguments

outer - The outer relation that may imply this relation

§Returns

true if this relation is implied by outer, false otherwise

§Example

use debian_control::lossless::relations::Relation;
use debian_control::relations::VersionConstraint;

let inner = Relation::new("pkg", Some((VersionConstraint::GreaterThanEqual, "1.0".parse().unwrap())));
let outer = Relation::new("pkg", Some((VersionConstraint::GreaterThanEqual, "1.5".parse().unwrap())));
assert!(inner.is_implied_by(&outer));

let inner2 = Relation::new("pkg", None);
assert!(inner2.is_implied_by(&outer));