regex101: Parse Kubernetes Resource URI Paths

^start of line

Non-Capturing Group(?:/api|/apis/(?P<GROUP>[^/]+))

1st Alternative/api

/apithe literal text /api (case sensitive)

2nd Alternative/apis/(?P<GROUP>[^/]+)

/apis/the literal text /apis/ (case sensitive)

Group GROUP(?P<GROUP>[^/]+)

Negated Character Class[^/]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group VERSION(?P<VERSION>[^/]+)

Negated Character Class[^/]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:/namespaces/(?P<NAMESPACE>[^/]+))?

?repeats the group contents below at most once:

/namespaces/the literal text /namespaces/ (case sensitive)

Group NAMESPACE(?P<NAMESPACE>[^/]+)

Negated Character Class[^/]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group RESOURCETYPE(?P<RESOURCETYPE>[^/\n]+)

Negated Character Class[^/\n]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:/(?P<NAME>[^/\n]+))?

?repeats the group contents below at most once:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group NAME(?P<NAME>[^/\n]+)

Negated Character Class[^/\n]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:/(?P<SUBRESOURCE>[^/\n]+))?

?repeats the group contents below at most once:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group SUBRESOURCE(?P<SUBRESOURCE>[^/\n]+)

Negated Character Class[^/\n]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\na line-feed (newline) character (ASCII 10)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

^(?:/api|/apis/(?P<GROUP>[^/]+))/(?P<VERSION>[^/]+)(?:/namespaces/(?P<NAMESPACE>[^/]+))?/(?P<RESOURCETYPE>[^/\n]+)(?:/(?P<NAME>[^/\n]+))?(?:/(?P<SUBRESOURCE>[^/\n]+))?$

New

## Cluster-scoped resources
/api/v1/RESOURCETYPE
/api/v1/RESOURCETYPE/NAME
/apis/GROUP/VERSION/RESOURCETYPE
/apis/GROUP/VERSION/RESOURCETYPE/NAME

## Namespace-scoped resources:
/api/v1/namespaces/NAMESPACE/RESOURCETYPE
/api/v1/namespaces/NAMESPACE/RESOURCETYPE/NAME
/apis/GROUP/VERSION/namespaces/NAMESPACE/RESOURCETYPE
/apis/GROUP/VERSION/namespaces/NAMESPACE/RESOURCETYPE/NAME

## Cluster-scoped subresource:
/api/v1/RESOURCETYPE/NAME/SUBRESOURCE
/apis/GROUP/VERSION/RESOURCETYPE/NAME/SUBRESOURCE

## Namespace-scoped subresource
/api/v1/namespaces/NAMESPACE/RESOURCETYPE/NAME/SUBRESOURCE
/apis/GROUP/VERSION/namespaces/NAMESPACE/RESOURCETYPE/NAME/SUBRESOURCE