filter

package

v1.15.1 Latest Latest Go to latest Published: Oct 18, 2026 License: MIT Imports: 3 Imported by: 0

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Valid go.mod file
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Repository

github.com/inherelab/eget

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Documentation ¶

Overview ¶

Package filter holds the shared parser for the explicit PRE:/SUF:/REG: filter grammar and the "^" exclusion prefix.

It only parses: it does not decide what is being matched (release tag, asset name, file name or search keyword), does not build matchers and does not take over the glob or substring defaults of its callers. Callers keep their own trimming, error wording and matching semantics — see docs/plans/2026-10-17-rule-consolidation-plan.md.

Index ¶

func IsPattern(raw string) bool
func ParseRegex(expr string) (*regexp.Regexp, error)
func StripAnti(raw string) (bool, string)
type Kind
type RegexError
- func RegexErrorOf(err error) (*RegexError, bool)
- func (e *RegexError) Error() string
- func (e *RegexError) Unwrap() error
type Spec
- func Parse(raw string) (Spec, error)
- func (s Spec) PrefixRegex() *regexp.Regexp
- func (s Spec) SuffixRegex() *regexp.Regexp

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func IsPattern ¶

func IsPattern(raw string) bool

IsPattern reports whether raw uses an explicit PRE:/SUF:/REG: filter. It does not trim and does not treat "^PRE:" as a pattern.

func ParseRegex ¶

func ParseRegex(expr string) (*regexp.Regexp, error)

ParseRegex compiles a REG: expression and wraps failures in *RegexError.

func StripAnti ¶

func StripAnti(raw string) (bool, string)

StripAnti removes a single leading "^" exclusion marker and reports whether it was present. It does not trim and does not look at the syntax prefixes.

Types ¶

type Kind ¶

type Kind int

Kind is the filter form a raw expression uses.

const (
	KindPlain Kind = iota
	KindPrefix
	KindSuffix
	KindRegex
)

Filter forms.

type RegexError ¶

type RegexError struct {
	Expr string
	Err  error
}

RegexError reports an invalid REG: expression. Callers take Expr to keep their own error wording (e.g. `invalid tag regex %q`).

func RegexErrorOf ¶

func RegexErrorOf(err error) (*RegexError, bool)

RegexErrorOf extracts the *RegexError from err, if any.

func (*RegexError) Error ¶

func (e *RegexError) Error() string

func (*RegexError) Unwrap ¶

func (e *RegexError) Unwrap() error

type Spec ¶

type Spec struct {
	Raw   string
	Anti  bool
	Kind  Kind
	Expr  string
	Regex *regexp.Regexp
}

Spec is the parsed form of a filter expression.

Raw is the input as passed in (not trimmed, "^" not stripped); Expr is the expression without its syntax prefix (for KindPlain it equals Raw); Anti is set by the caller through StripAnti, never by Parse. Regex is filled for KindPrefix/KindSuffix/KindRegex and is nil for KindPlain, whose meaning (substring or anchored prefix) belongs to the caller.

func Parse ¶

func Parse(raw string) (Spec, error)

Parse parses a PRE:/SUF:/REG: expression (a plain value stays KindPlain).

It deliberately does not TrimSpace and does not strip "^": the tag callers trim before calling and treat "^" as literal content, while the asset/search callers strip "^" through StripAnti first.

func (Spec) PrefixRegex ¶

func (s Spec) PrefixRegex() *regexp.Regexp

PrefixRegex returns the case-insensitive, anchored-prefix matcher for the expression — the regex the tag and asset filters built before.

func (Spec) SuffixRegex ¶

func (s Spec) SuffixRegex() *regexp.Regexp

SuffixRegex returns the case-insensitive suffix matcher for the expression.

Source Files ¶

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