[buildbot] phase1, phase2: add unified ccache handling

[LEDE Commits]

jow pushed a commit to buildbot.git, branch master:
https://git.lede-project.org/17b4c63900a461ef5ae3c5cdaed7e8d255847fde

commit 17b4c63900a461ef5ae3c5cdaed7e8d255847fde
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Sun Jan 22 15:23:13 2017 +0100

    phase1, phase2: add unified ccache handling
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 phase1/ccache.sh  | 21 +++++++++++++++++++++
 phase1/master.cfg | 14 ++++++++++++++
 phase2/master.cfg | 11 +++++++++++
 3 files changed, 46 insertions(+)

diff --git a/phase1/ccache.sh b/phase1/ccache.sh
new file mode 100755
index 0000000..61590f2
--- /dev/null
+++ b/phase1/ccache.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+export LC_ALL=C
+
+mkdir -p "$HOME/.ccache"
+
+grep -sq max_size "$HOME/.ccache/ccache.conf" || \
+	echo "max_size = 10.0G" >> "$HOME/.ccache/ccache.conf"
+
+grep -sq compiler_check "$HOME/.ccache/ccache.conf" || \
+	echo "compiler_check = %compiler% -dumpmachine; %compiler% -dumpversion" >> "$HOME/.ccache/ccache.conf"
+
+for dir in $(make --no-print-directory val.TOOLCHAIN_DIR val.STAGING_DIR val.STAGING_DIR_HOST V=s | grep staging_dir/); do
+	mkdir -p "$dir"
+	test -L "$dir/ccache" || rm -rf "$dir/ccache"
+	ln -s "$HOME/.ccache" "$dir/ccache"
+done
+
+./staging_dir/host/bin/ccache -s 2>/dev/null
+
+exit 0
diff --git a/phase1/master.cfg b/phase1/master.cfg
index ae69309..bc21f80 100644
--- a/phase1/master.cfg
+++ b/phase1/master.cfg
@@ -454,6 +454,20 @@ for target in targets:
 		command=["./scripts/feeds", "install", "-a"],
 		env = MakeEnv()))
 
+	# ccache helper
+	factory.addStep(FileDownload(
+		mastersrc = "ccache.sh",
+		slavedest = "ccache.sh",
+		mode = 0755
+	))
+
+	# ccache prepare
+	factory.addStep(ShellCommand(
+                name = "prepccache",
+                description = "Preparing ccache",
+                command = ["./ccache.sh"]
+	))
+
 	# seed config
 	factory.addStep(FileDownload(
 		mastersrc = "config.seed",
diff --git a/phase2/master.cfg b/phase2/master.cfg
index 08b5387..d6d2e22 100644
--- a/phase2/master.cfg
+++ b/phase2/master.cfg
@@ -287,6 +287,17 @@ for arch in arches:
 		workdir = "build/sdk",
 		command = ["sh", "-c", "rm -f .config && make defconfig"]))
 
+	factory.addStep(FileDownload(
+		mastersrc = home_dir+'/ccache.sh',
+		slavedest = 'sdk/ccache.sh',
+		mode = 0755))
+
+	factory.addStep(ShellCommand(
+		name = "prepccache",
+		description = "Preparing ccache",
+		workdir = "build/sdk",
+		command = ["./ccache.sh"]))
+
 	factory.addStep(ShellCommand(
 		name = "updatefeeds",
 		description = "Updating feeds",