add automatic code formatter following https://google.github.io/styleguide/Rguide.xml

[valse.git] / hooks / pre-commit

diff --git a/hooks/pre-commit b/hooks/pre-commit
new file mode 100755 (executable)
index 0000000..f9649b3
--- /dev/null
+++ b/hooks/pre-commit
@@ -0,0 +1,46 @@
+#!/bin/sh
+#
+# Hook used to indent all source files before commiting
+#
+
+# indent / format file by type
+indent() {
+       # getting against as the current commit
+       if git rev-parse --verify HEAD >/dev/null 2>&1
+       then
+               local against=HEAD
+       else
+               # Initial commit: diff against an empty tree object
+               local against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+       fi
+
+       # loop on modified files
+       git diff --cached --name-only $against |while read file;
+       do
+               local ext=$(expr "$file" : ".*\(\..*\)")
+               case $ext in
+               .R|.r)
+                       __indent_R;
+               ;;
+               esac
+       done
+}
+
+# Indent the file with `indent' if this is a R file
+__indent_R() {
+       if test ! -x "$INDENT"
+       then
+               return;
+       fi
+       if test ! -f $file
+       then
+               return;
+       fi
+
+       echo "Indenting " $file
+       echo "library(formatR);formatR::tidy_source('$file',comment=TRUE,blank=TRUE,
+               arrow=TRUE,brace.newline=TRUE,indent=2,width.cutoff=80,file='$file')" | R --slave
+       git add "$file"
+}
+
+indent