diff options
Diffstat (limited to 'tools/emacs-pkgs/defzone')
| -rw-r--r-- | tools/emacs-pkgs/defzone/defzone.el | 60 | ||||
| -rw-r--r-- | tools/emacs-pkgs/defzone/example.el | 45 |
2 files changed, 105 insertions, 0 deletions
diff --git a/tools/emacs-pkgs/defzone/defzone.el b/tools/emacs-pkgs/defzone/defzone.el new file mode 100644 index 000000000000..ffd359e5ff83 --- /dev/null +++ b/tools/emacs-pkgs/defzone/defzone.el @@ -0,0 +1,60 @@ +;;; defzone.el --- Generate zone files from Elisp -*- lexical-binding: t; -*- + +(require 'dash) +(require 'dash-functional) +(require 's) + +(defun record-to-record (zone record &optional subdomain) + "Evaluate a record definition and turn it into a zone file + record in ZONE, optionally prefixed with SUBDOMAIN." + + (cl-labels ((plist->alist (plist) + (when plist + (cons + (cons (car plist) (cadr plist)) + (plist->alist (cddr plist)))))) + (let ((name (if subdomain (s-join "." (list subdomain zone)) zone))) + (pcase record + ;; SOA RDATA (RFC 1035; 3.3.13) + ((and `(SOA . (,ttl . ,keys)) + (let (map (:mname mname) (:rname rname) (:serial serial) + (:refresh refresh) (:retry retry) (:expire expire) + (:minimum min)) + (plist->alist keys))) + (if-let ((missing (-filter #'null (not (list mname rname serial + refresh retry expire min))))) + (error "Missing fields in SOA record: %s" missing) + (format "%s %s IN SOA %s %s %s %s %s %s %s" + name ttl mname rname serial refresh retry expire min))) + + (`(NS . (,ttl . ,targets)) + (->> targets + (-map (lambda (target) (format "%s %s IN NS %s" name ttl target))) + (s-join "\n"))) + + (`(MX . (,ttl . ,pairs)) + (->> pairs + (-map (-lambda ((preference . exchange)) + (format "%s %s IN MX %s %s" name ttl preference exchange))) + (s-join "\n"))) + + (`(TXT ,ttl ,text) (format "%s %s IN TXT %s" name ttl (prin1-to-string text))) + + (`(A . (,ttl . ,ips)) + (->> ips + (-map (lambda (ip) (format "%s %s IN A %s" name ttl ip))) + (s-join "\n"))) + + (`(CNAME ,ttl ,target) (format "%s %s IN CNAME %s" name ttl target)) + + ((and `(,sub . ,records) + (guard (stringp sub))) + (s-join "\n" (-map (lambda (r) (record-to-record zone r sub)) records))) + + (_ (error "Invalid record definition: %s" record)))))) + +(defmacro defzone (fqdn &rest records) + "Generate zone file for the zone at FQDN from a simple DSL." + (declare (indent defun)) + + `(s-join "\n" (-map (lambda (r) (record-to-record ,fqdn r)) (quote ,records)))) diff --git a/tools/emacs-pkgs/defzone/example.el b/tools/emacs-pkgs/defzone/example.el new file mode 100644 index 000000000000..e9c86d25eec8 --- /dev/null +++ b/tools/emacs-pkgs/defzone/example.el @@ -0,0 +1,45 @@ +;;; example.el - usage example for defzone macro + +(defzone "tazj.in." + (SOA 21600 + :mname "ns-cloud-a1.googledomains.com." + :rname "cloud-dns-hostmaster.google.com." + :serial 123 + :refresh 21600 + :retry 3600 + :expire 1209600 + :minimum 300) + + (NS 21600 + "ns-cloud-a1.googledomains.com." + "ns-cloud-a2.googledomains.com." + "ns-cloud-a3.googledomains.com." + "ns-cloud-a4.googledomains.com.") + + (MX 300 + (1 . "aspmx.l.google.com.") + (5 . "alt1.aspmx.l.google.com.") + (5 . "alt2.aspmx.l.google.com.") + (10 . "alt3.aspmx.l.google.com.") + (10 . "alt4.aspmx.l.google.com.")) + + (TXT 3600 "google-site-verification=d3_MI1OwD6q2OT42Vvh0I9w2u3Q5KFBu-PieNUE1Fig") + + (A 300 "34.98.120.189") + + ;; Nested record sets are indicated by a list that starts with a + ;; string (this is just joined, so you can nest multiple levels at + ;; once) + ("blog" + ;; Blog "storage engine" is in a separate DNS zone + (NS 21600 + "ns-cloud-c1.googledomains.com." + "ns-cloud-c2.googledomains.com." + "ns-cloud-c3.googledomains.com." + "ns-cloud-c4.googledomains.com.")) + + ("git" + (A 300 "34.98.120.189") + (TXT 300 "<3 edef")) + + ("files" (CNAME 300 "c.storage.googleapis.com."))) |