ci: Include pre-build style check

tools/style-check_build

@@ -1,13 +1,15 @@
 #!/bin/sh
 
+# Enforces style check for the C parts of the project.
+
 if [ -z "$1" ]; then
-    echo "Please pass directory to check."
+    echo "Please pass build directory to check."
     exit 1
 fi
 
 cd "$1"
+
 clang-tidy --checks=-clang-diagnostic-missing-braces,readability-braces-around-statements, \
            --warnings-as-errors=readability-braces-around-statements \
            -extra-arg=-Wno-unknown-warning-option \
            ../src/*.c ../eek/*.c ../eekboard/*.c
-

tools/style-check_source

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+# Enforces style check for the project.
+THIS=$(realpath $0)
+TOOLS=$(dirname $THIS)
+cd $TOOLS/..
+
+# The CI file seems to be touched regularly, and causing problems often,
+# unlike layout files.
+./tools/yamlfmt ./.gitlab-ci.yml $1