Add mechanisms to reformant and check code style (#128)

Use an internal version of astyle (astyle 3.0). Scripts taken from QGIS.
astyle.options from https://github.com/uclouvain/openjpeg/issues/128

scripts/prepare-commit.sh can be used locally to automatically reformat
edited files.

Travis-CI will run scripts/verify-indentation.sh to verify committed files.

1 files changed, 79 insertions, 0 deletions

diff --git a/scripts/verify-indentation.sh b/scripts/verify-indentation.sh
new file mode 100755
index 00000000..120e1411
--- /dev/null
+++ b/scripts/verify-indentation.sh
@@ -0,0 +1,79 @@
+#!/bin/bash
+cd $(git rev-parse --show-toplevel)
+
+export PATH=$PATH:$PWD/scripts
+
+if [ -z "$TRAVIS_COMMIT_RANGE" ]; then
+	echo "No commit range given"
+	exit 0
+fi
+
+if ! type -p astyle.sh >/dev/null; then
+	echo astyle.sh not found
+	exit 1
+fi
+
+set -e
+
+ASTYLEDIFF=/tmp/astyle.diff
+>$ASTYLEDIFF
+
+
+if [[ ! -z  $TRAVIS_PULL_REQUEST_BRANCH  ]]; then
+  # if on a PR, just analyse the changed files
+  echo "TRAVIS PR BRANCH: $TRAVIS_PULL_REQUEST_BRANCH"
+  FILES=$(git diff --diff-filter=AM --name-only $(git merge-base HEAD master) | tr '\n' ' ' )
+elif [[ ! -z  $TRAVIS_COMMIT_RANGE  ]]; then
+  echo "TRAVIS COMMIT RANGE: $TRAVIS_COMMIT_RANGE"
+  FILES=$(git diff --diff-filter=AM --name-only ${TRAVIS_COMMIT_RANGE/.../..} | tr '\n' ' ' )
+fi
+
+for f in $FILES; do
+	if ! [ -f "$f" ]; then
+		echo "$f was removed." >>/tmp/ctest-important.log
+		continue
+	fi
+
+	echo "Checking $f" >>/tmp/ctest-important.log
+	case "$f" in
+	thirdparty*)
+		echo "$f skipped"
+		continue
+		;;
+
+	*.cpp|*.c|*.h|*.cxx|*.hxx|*.c++|*.h++|*.cc|*.hh|*.C|*.H|*.sip|*.py)
+		;;
+
+	*)
+		continue
+		;;
+	esac
+
+	m="$f.prepare"
+	cp "$f" "$m"
+	astyle.sh "$f"
+	if diff -u "$m" "$f" >>$ASTYLEDIFF; then
+		rm "$m"
+	else
+		echo "File $f needs indentation"
+	fi
+done
+
+if [ -s "$ASTYLEDIFF" ]; then
+	echo
+	echo "Required indentation updates:"
+	cat "$ASTYLEDIFF"
+
+	cat <<EOF
+
+Tips to prevent and resolve:
+* Enable WITH_ASTYLE in your cmake configuration to format C++ code
+* Install autopep8 (>= 1.2.1) to format python code
+* Use "scripts/astyle.sh file" to fix the now badly indented files
+* Consider using scripts/prepare-commit.sh as pre-commit hook to avoid this
+  in the future (ln -s scripts/prepare-commit.sh .git/hooks/pre-commit) or
+  run it manually before each commit.
+EOF
+
+	exit 1
+fi