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add negative match for repositories (regexp) #44

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add negative match for repositories (regexp) #44

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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,8 @@ We run our own private registry on a server with limited storage and it was only
URL of registry (default "http://localhost:5000")
-repo string
matching repositories (allows regexp) (default ".*")
-nrepo string
matching everything but this repo (allows regexp) (default empty)
-repos int
number of repositories to garbage collect (default 5)
-tag string
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18 changes: 16 additions & 2 deletions main.go
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Expand Up @@ -32,7 +32,7 @@ var (
// Base URL of registry
registryURL *string
// Regexps for filtering repositories and tags
repoRegexpStr, tagRegexpStr, negTagRegexpStr *string
repoRegexpStr, negRepoRegexpStr, tagRegexpStr, negTagRegexpStr *string
// Maximum age of image to consider for deletion
day, month, year *int
// Max number of repositories to be fetched from registry
Expand All @@ -47,7 +47,7 @@ var (
ver *bool

// Compiled regexps
repoRegexp, tagRegexp, negTagRegexp *regexp.Regexp
repoRegexp, negRepoRegexp, tagRegexp, negTagRegexp *regexp.Regexp
// Skip insecure TLS
insecure *bool
// Username and password
Expand All @@ -72,6 +72,8 @@ func init() {
year = flag.Int("year", 0, "max age in days")
// Regexp for images (default = .*)
repoRegexpStr = flag.String("repo", ".*", "matching repositories (allows regexp)")
// Negative regexp for images (default = empty)
negRepoRegexpStr = flag.String("nrepo", "", "matching repositories (allows regexp)")
// Regexp for tags (default = .*)
tagRegexpStr = flag.String("tag", ".*", "matching tags (allows regexp)")
// Negative regexp for tags (default = empty)
Expand Down Expand Up @@ -101,6 +103,9 @@ func main() {

// Compile regular expressions
repoRegexp = regexp.MustCompile(*repoRegexpStr)
if *negRepoRegexpStr != "" {
negRepoRegexp = regexp.MustCompile(*negRepoRegexpStr)
}
tagRegexp = regexp.MustCompile(*tagRegexpStr)
if *negTagRegexpStr != "" {
negTagRegexp = regexp.MustCompile(*negTagRegexpStr)
Expand Down Expand Up @@ -165,6 +170,15 @@ func main() {
continue
}

// Check for the negative regexp for repos as well.
if negRepoRegexp != nil {
negRepoMatch := negRepoRegexp.MatchString(entry)
if negRepoMatch {
logger.WithFields(log.Fields{"entry": entry}).Debug("Ignore excluded repository (-nrepo=", *negRepoRegexpStr, ")")
continue
}
}

// Establish repository object in registry
repoName, err := reference.WithName(entry)

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