Brad Larsen
2bffafb280
* perf: switch nearly all remaining uses of stdlib regexp to wasilibs/go-re2 * perf: upgrade github.com/wasilibs/go-re2 from v1.9.0 to v1.12.0 * gofmt modified files * snowflake detector: hoist constant regex compilation to package-level variables * add golangci lint to steer folks to go-re2 instead of regexp
45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
package custom_detectors
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import (
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regexp "github.com/wasilibs/go-re2"
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"strconv"
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"strings"
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)
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// nameGroupRegex matches `{ name . group }` ignoring any whitespace.
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var nameGroupRegex = regexp.MustCompile(`{\s*([a-zA-Z0-9-_]+)\s*(\.\s*[0-9]*)?\s*}`)
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// RegexVarString is a string with embedded {name.group} variables. A name may
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// only contain alphanumeric, hyphen, and underscore characters. Group is
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// optional but if provided it must be a non-negative integer. If the group is
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// omitted it defaults to 0.
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type RegexVarString struct {
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original string
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// map from name to group
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variables map[string]int
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}
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func NewRegexVarString(original string) RegexVarString {
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variables := make(map[string]int)
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matches := nameGroupRegex.FindAllStringSubmatch(original, -1)
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for _, match := range matches {
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name, group := match[1], 0
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// The second match will start with a period followed by any number
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// of whitespace.
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if len(match[2]) > 1 {
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g, err := strconv.Atoi(strings.TrimSpace(match[2][1:]))
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if err != nil {
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continue
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}
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group = g
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}
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variables[name] = group
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}
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return RegexVarString{
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original: original,
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variables: variables,
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}
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}
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