SERVER-25608 Add a SCons target and config vars for cache pruning

1 files changed, 27 insertions, 0 deletions

diff --git a/SConstruct b/SConstruct
index c4a8ba07ffd..bc895815410 100644
--- a/SConstruct
+++ b/SConstruct
@@ -591,6 +591,20 @@ env_vars.Add('ARFLAGS',
     help='Sets flags for the archiver',
     converter=variable_shlex_converter)
 
+env_vars.Add(
+    'CACHE_SIZE',
+    help='Maximum size of the cache (in gigabytes)',
+    default=32,
+    converter=lambda x:int(x)
+)
+
+env_vars.Add(
+    'CACHE_PRUNE_TARGET',
+    help='Maximum percent in-use in cache after pruning',
+    default=66,
+    converter=lambda x:int(x)
+)
+
 env_vars.Add('CC',
     help='Select the C compiler to use')
 
@@ -2951,6 +2965,19 @@ env.Requires(dependencyDb, all)
 # since presumably we can re-install them from the origin if needed.
 env.NoCache(env.FindInstalledFiles())
 
+# Declare the cache prune target
+cachePrune = env.Command(
+    target="#cache-prune",
+    source=[
+        "#buildscripts/scons_cache_prune.py",
+    ],
+    action="$PYTHON ${SOURCES[0]} --cache-dir=${CACHE_DIR.abspath} --cache-size=${CACHE_SIZE} --prune-ratio=${CACHE_PRUNE_TARGET/100.00}",
+    CACHE_DIR=env.Dir(cacheDir),
+)
+
+env.AlwaysBuild(cachePrune)
+env.Alias('cache-prune', cachePrune)
+
 # Substitute environment variables in any build targets so that we can
 # say, for instance:
 #