Add support for sccache

Signed-off-by: idealseal <[email protected]>

Author: idealseal

bin/ebuild.sh

@@ -732,6 +732,15 @@ if [[ ${EBUILD_PHASE} != clean?(rm) ]]; then
 
 				[[ -n ${CCACHE_SIZE} ]] && ccache -M ${CCACHE_SIZE} &> /dev/null
 			fi
+
+			if contains_word sccache "${FEATURES}"; then
+				if [[ -n ${SCCACHE_DIR} ]] ; then
+					addread "${SCCACHE_DIR}"
+					addwrite "${SCCACHE_DIR}"
+				fi
+
+				[[ -n ${SCCACHE_SIZE} ]] && ccache -M ${SCCACHE_SIZE} &> /dev/null
+			fi
 		fi
 	fi
 fi

lib/_emerge/EbuildPhase.py

@@ -139,6 +139,7 @@ class EbuildPhase(CompositeTask):
         "nostrip",
         "preserve-libs",
         "sandbox",
+        "sccache",
         "selinux",
         "sesandbox",
         "splitdebug",

lib/_emerge/actions.py

@@ -2075,6 +2075,23 @@ def action_info(settings, trees, myopts, myfiles):
             ccache_str += " [disabled]"
         append(ccache_str)
 
+    try:
+        proc = subprocess.Popen(
+            ["sccache", "-V"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT
+        )
+    except OSError:
+        output = (1, None)
+    else:
+        output = _unicode_decode(proc.communicate()[0]).rstrip("\n")
+        output = (proc.wait(), output)
+    if output[0] == os.EX_OK:
+        sccache_str = output[1].split("\n", 1)[0]
+        if "sccache" in settings.features:
+            sccache_str += " [enabled]"
+        else:
+            sccache_str += " [disabled]"
+        append(sccache_str)
+
     myvars = [
         "dev-build/autoconf",
         "dev-build/automake",

lib/portage/const.py

@@ -223,6 +223,7 @@
         "python-trace",
         "qa-unresolved-soname-deps",
         "sandbox",
+        "sccache",
         "selinux",
         "sesandbox",
         "sfperms",

lib/portage/package/ebuild/doebuild.py

@@ -609,8 +609,9 @@ def doebuild_environment(
         ccache = "ccache" in mysettings.features
         distcc = "distcc" in mysettings.features
         icecream = "icecream" in mysettings.features
+        sccache = "sccache" in mysettings.features
 
-        if ccache or distcc or icecream:
+        if ccache or distcc or icecream or sccache:
             libdir = None
             default_abi = mysettings.get("DEFAULT_ABI")
             if default_abi:
@@ -628,6 +629,8 @@ def doebuild_environment(
                 masquerades.append(("icecream", "icecc"))
             if ccache:
                 masquerades.append(("ccache", "ccache"))
+            if sccache:
+                masquerades.append(("sccache", "sccache"))
 
             for feature, m in masquerades:
                 for l in possible_libexecdirs:

lib/portage/package/ebuild/prepare_build_dirs.py

@@ -216,6 +216,11 @@ def _prepare_features_dirs(mysettings):
             "subdirs": ("lock", "state"),
             "always_recurse": True,
         },
+        "sccache": {
+            "basedir_var": "SCCACHE_DIR",
+            "default_dir": os.path.join(mysettings["PORTAGE_TMPDIR"], "sccache"),
+            "always_recurse": False,
+        },
     }
     dirmode = 0o2070
     filemode = 0o60