Specify "CCACHE_NOHASHDIR" when using ccache

AUR packages tend to be built with the package's name and version as
part of the current-working-directory during building. Specifying
CCACHE_NOHASHDIR=1 will cause ccache to ignore the
current-working-directory when hashing for ccache-cached objects. This
should hopefully fix issues where new package versions tend to cause
cache-misses on build.

diff --git a/update.py b/update.py
index b34a8ff8824bc3e735ba68bf76617cac81afbd71..df681f9a49849bdeaf8c8be599d06668655ff2fb 100755 (executable)
--- a/update.py
+++ b/update.py
@@ -1444,6 +1444,7 @@ def update_pkg_list(
             command_list.insert(2, "-d")
             command_list.insert(3, f'{pkg_state[pkg]["ccache_dir"]}:/ccache')
             post_command_list.insert(1, "CCACHE_DIR=/ccache")
+            post_command_list.insert(2, "CCACHE_NOHASHDIR=1")
         elif "sccache_dir" in pkg_state[pkg]:
             command_list.insert(2, "-d")
             command_list.insert(3, f'{pkg_state[pkg]["sccache_dir"]}:/sccache')