be83c11fb0
Signed-off-by: Daniel Nephin <dnephin@docker.com> Upstream-commit: 4f0d95fa6ee7f865597c03b9e63702cdcb0f7067 Component: engine
36 lines
702 B
Go
36 lines
702 B
Go
package discovery // import "github.com/docker/docker/pkg/discovery"
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import (
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"fmt"
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"regexp"
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"strconv"
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)
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// Generate takes care of IP generation
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func Generate(pattern string) []string {
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re, _ := regexp.Compile(`\[(.+):(.+)\]`)
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submatch := re.FindStringSubmatch(pattern)
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if submatch == nil {
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return []string{pattern}
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}
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from, err := strconv.Atoi(submatch[1])
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if err != nil {
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return []string{pattern}
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}
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to, err := strconv.Atoi(submatch[2])
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if err != nil {
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return []string{pattern}
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}
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template := re.ReplaceAllString(pattern, "%d")
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var result []string
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for val := from; val <= to; val++ {
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entry := fmt.Sprintf(template, val)
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result = append(result, entry)
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}
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return result
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}
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