Bug#1010477: tzdata: reduce Installed-Size using deduplication
Source: tzdata
Version: 2022a-1
Severity: wishlist
Tags: patch
tzdata is not a huge package, but when considering it for use in an
embedded system, the size is noticeable. Depending on the file system in
use, the size consumption may even be bigger due to the many small
files.
It turns out that a number of those files are duplicated. You can see a
report at https://dedup.debian.net/compare/tzdata/tzdata. If replacing
them with hardlinks, we can easily save 20% of reported Installed-Size.
I expect that the practical savings are bigger.
Please consider applying the attached patch. If you dislike hard links
for some reason, the same effect can be achieved using symlinks in a
similarly mechanical way.
Helmut
diff --minimal -Nru tzdata-2022a/debian/changelog tzdata-2022a/debian/changelog
--- tzdata-2022a/debian/changelog 2022-03-22 20:49:04.000000000 +0100
+++ tzdata-2022a/debian/changelog 2022-05-02 12:00:33.000000000 +0200
@@ -1,3 +1,10 @@
+tzdata (2022a-1.1) UNRELEASED; urgency=medium
+
+ * Non-maintainer upload.
+ * Deduplicate files in timezone database using hard links. Closes: #-1.
+
+ -- Helmut Grohne <helmut.grohne@intenta.de> Mon, 02 May 2022 12:00:33 +0200
+
tzdata (2022a-1) unstable; urgency=high
[ Aurelien Jarno ]
diff --minimal -Nru tzdata-2022a/debian/control tzdata-2022a/debian/control
--- tzdata-2022a/debian/control 2022-03-22 20:47:25.000000000 +0100
+++ tzdata-2022a/debian/control 2022-05-02 12:00:33.000000000 +0200
@@ -2,7 +2,7 @@
Section: localization
Priority: required
Build-Depends: debhelper-compat (= 13)
-Build-Depends-Indep: gawk, po-debconf, symlinks
+Build-Depends-Indep: gawk, po-debconf, symlinks, rdfind
Rules-Requires-Root: no
Maintainer: GNU Libc Maintainers <debian-glibc@lists.debian.org>
Uploaders: Clint Adams <clint@debian.org>, Aurelien Jarno <aurel32@debian.org>
diff --minimal -Nru tzdata-2022a/debian/rules tzdata-2022a/debian/rules
--- tzdata-2022a/debian/rules 2022-03-22 20:47:25.000000000 +0100
+++ tzdata-2022a/debian/rules 2022-05-02 12:00:32.000000000 +0200
@@ -76,6 +76,7 @@
echo ; \
done ) > $(TEMPLATES_FILE)
debconf-updatepo
+ rdfind -outputname /dev/null -makehardlinks true $(TZGEN)
override_dh_auto_test:
# The upstream tests are related to the sources. Just skip it.
diff --minimal -Nru tzdata-2022a/debian/tzdata.lintian-overrides tzdata-2022a/debian/tzdata.lintian-overrides
--- tzdata-2022a/debian/tzdata.lintian-overrides 1970-01-01 01:00:00.000000000 +0100
+++ tzdata-2022a/debian/tzdata.lintian-overrides 2022-05-02 12:00:33.000000000 +0200
@@ -0,0 +1,2 @@
+# lintian bug #1010476
+tzdata: package-contains-hardlink *
Reply to: