Introduce format checker (#21)

This commit introduces C++ format checker to make it easy to maintain style
consistency. Users may invoke this format checker by running 'nncc format'.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/scripts/command/format b/scripts/command/format
new file mode 100644
index 000000000..fb5cd4d38
--- /dev/null
+++ b/scripts/command/format
@@ -0,0 +1,47 @@
+#!/bin/bash
+
+CLANG_FORMAT_CANDIDATES=()
+CLANG_FORMAT_CANDIDATES+=("clang-format")
+CLANG_FORMAT_CANDIDATES+=("clang-format-3.9")
+
+for CLANG_FORMAT_CANDIDATE in ${CLANG_FORMAT_CANDIDATES[@]}; do
+  if [[ -n $(which ${CLANG_FORMAT_CANDIDATE}) ]]; then
+    CLANG_FORMAT="${CLANG_FORMAT_CANDIDATE}"
+  fi
+done
+
+if [[ -z ${CLANG_FORMAT}  ]]; then
+  echo "[ERROR] clang-format is unavailable"
+  echo
+  echo "Please install clang-format before running format check"
+  exit 255
+fi
+
+if [[ -n $(git -C "${NNCC_PROJECT_PATH}" diff) ]]; then
+  echo "[ERROR] Commit all the changes before running format check"
+  exit 255
+fi
+
+DIRECTORIES_TO_BE_TESTED=()
+
+for DIRECTORY_TO_BE_TESTED in $(find "${NNCC_PROJECT_PATH}" -name '.FORMATCHECKED' -exec dirname {} \;); do
+  DIRECTORIES_TO_BE_TESTED+=("$DIRECTORY_TO_BE_TESTED")
+done
+
+CANDIDATE_FILES=$(find "${DIRECTORIES_TO_BE_TESTED[@]}" -iname '*.h' -o -iname '*.cpp')
+TRACKED_FILES=$(git ls-files $CANDIDATE_FILES)
+
+if [[ -z "$TRACKED_FILES" ]]; then
+  "${CLANG_FORMAT}" -i $TRACKED_FILES
+fi
+
+DIFF=$(git -C "${NNCC_PROJECT_PATH}" diff)
+
+if [[ -n "${DIFF}" ]]; then
+  echo "${DIFF}" > "${NNCC_PROJECT_PATH}/format.patch"
+
+  echo "[FAILED] Please find format.patch for details"
+  exit 255
+fi
+
+echo "[PASSED]"