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-rwxr-xr-xdebian/rules20
1 files changed, 20 insertions, 0 deletions
diff --git a/debian/rules b/debian/rules
index 3ca425f76..dac7c6e41 100755
--- a/debian/rules
+++ b/debian/rules
@@ -20,6 +20,26 @@ VENDOR_DEBIAN := $(shell { dpkg-vendor --is 'Debian' && echo 'yes'; } || { dpkg-
ifeq ($(VENDOR_DEBIAN),yes)
RELEASE_VER := $(shell /usr/bin/lsb_release -r | cut -d ':' -f'2' | sed -e 's/\s*//g' | cut -d '.' -f'1')
+
+ # Newer Debian versions might report "n/a" for testing and unstable.
+ ifeq ($(RELEASE_VER),n/a)
+ # On these platforms, the best way to determine the system version is by
+ # going through "apt-cache policy".
+ # Note that this should only be the case for either testing or unstable.
+ # Other systems should have a proper version number.
+ # This is also why we can just drop any suites/archive names (this is
+ # what a= means) containing a dash character (e.g., "stable-updates")
+ # and only pick the first match.
+ RELEASE_VER := $(shell /usr/bin/apt-cache policy | grep -E 'o=(De|Rasp)bian,' | grep -E 'l=(De|Rasp)bian,' | grep -F 'c=main,' | grep -Eo 'a=[^, ]*' | sed -e 's/^a=//' | grep -v -- '-' | head -n '1')
+
+ # Do error checking.
+ ifneq ($(RELEASE_VER),testing)
+ ifneq ($(RELEASE_VER),unstable)
+ $(error Release version could not be determined, sorry. Extracted value: $(RELEASE_VER))
+ endif
+ endif
+ endif
+
# Let's fake testing's and unstable's "release version"...
ifeq ($(RELEASE_VER),testing)
RELEASE_VER := 999