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reference: add const for (optional) port, and rename "domain" variable 

The `domain` variable didn't make it clear that this could include port-numbers
as well, so renaming it makes that more visible.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2022-11-10 11:43:32 +01:00
parent f0c7c97e73
commit 919bd8ab09
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1 changed files with 8 additions and 4 deletions
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12
reference/regexp.go
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@ -23,6 +23,10 @@ const (
// repository name to start with a component as defined by DomainRegexp.
domainNameComponent = `(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9-]*[a-zA-Z0-9])`
// optionalPort matches an optional port-number including the port separator
// (e.g. ":80").
optionalPort = `(?::[0-9]+)?`
// tag matches valid tag names. From docker/docker:graph/tags.go.
tag = `[\w][\w.-]{0,127}`
@ -66,7 +70,7 @@ var (
// allowed by the URI Host subcomponent on rfc3986 to ensure backwards
// compatibility with Docker image names.
domain = host + optional(`:[0-9]+`)
domainAndPort = host + optionalPort
// DomainRegexp matches hostname or IP-addresses, optionally including a port
// number. It defines the structure of potential domain components that may be
@ -77,7 +81,7 @@ var (
// addresses such as IPv4-Mapped).
//
// [rfc6874]: https://www.rfc-editor.org/rfc/rfc6874.
DomainRegexp = regexp.MustCompile(domain)
DomainRegexp = regexp.MustCompile(domainAndPort)
// TagRegexp matches valid tag names. From docker/docker:graph/tags.go.
TagRegexp = regexp.MustCompile(tag)
@ -97,7 +101,7 @@ var (
// character, with following parts able to be separated by a separator
// (one period, one or two underscore and multiple dashes).
pathComponent = alphanumeric + optional(repeated(separator, alphanumeric))
namePat = optional(domain+`/`) + pathComponent + optional(repeated(`/`+pathComponent))
namePat = optional(domainAndPort+`/`) + pathComponent + optional(repeated(`/`+pathComponent))
// NameRegexp is the format for the name component of references, including
// an optional domain and port, but without tag or digest suffix.
@ -105,7 +109,7 @@ var (
// anchoredNameRegexp is used to parse a name value, capturing the
// domain and trailing components.
anchoredNameRegexp = regexp.MustCompile(anchored(optional(capture(domain), `/`), capture(pathComponent, optional(repeated(`/`+pathComponent)))))
anchoredNameRegexp = regexp.MustCompile(anchored(optional(capture(domainAndPort), `/`), capture(pathComponent, optional(repeated(`/`+pathComponent)))))
referencePat = anchored(capture(namePat), optional(`:`, capture(tag)), optional(`@`, capture(digestPat)))