tzdata: Fix gen.rc to not require contents of source files

This also fixes a symlink target calculation bug.

1 files changed, 26 insertions, 0 deletions

diff --git a/core/tz/tzdata.awk b/core/tz/tzdata.awk
new file mode 100644
index 00000000..8bd70188
--- /dev/null
+++ b/core/tz/tzdata.awk
@@ -0,0 +1,26 @@
+# usage: awk -f tzdata.awk repo=out/root.git out=out/core/tz/zoneinfo [file...]
+
+function run(cmd) {
+	status = system(cmd)
+	if (status != 0)
+		exit status
+}
+
+BEGIN {
+	cmdfmt = "rc ./scripts/hash.rc %s %s share/zoneinfo/%s %s"
+}
+
+FNR == 1 {
+	run(sprintf("zic -d %s %s", out, FILENAME))
+}
+
+$1 == "Link" {
+	s = $3
+	gsub(/[^/]+/, "..", s)
+	s = substr(s, 1, length(s) - 2) $2
+	run(sprintf(cmdfmt, repo, 120000, $3, s))
+}
+
+$1 == "Zone" {
+	run(sprintf(cmdfmt, repo, 100644, $2, out "/" $2))
+}