add coveralls coverage reporting

coveralls

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+if [ 0 -eq $(find -iname *.gcda | wc -l) ]
+then
+  exit 0
+fi
+
+gcov --source-prefix ${TRAVIS_BUILD_DIR} --preserve-paths --relative-only $(find -iname *.gcda) 1>/dev/null || exit 0
+
+cat >coverage.json <<EOF
+{
+  "service_job_id": "${TRAVIS_JOB_ID}",
+  "service_name": "travis-ci",
+  "source_files": [
+EOF
+
+for file in include*.gcov
+do
+  path=$(echo ${file} | sed -re 's%#%\/%g; s%.gcov$%%')
+  cat >>coverage.json <<EOF
+    {
+      "name": "${path}",
+      "source_digest": "$(md5sum ${TRAVIS_BUILD_DIR}/${path} | awk '{ print $1 }')",
+      "coverage": [$(tail -n +3 ${file} | cut -d ':' -f 1 | sed -re 's%^ +%%g; s%-%null%g; s%^[#=]+$%0%;' | tr $'\n' ',' | sed -re 's%,$%%')]
+    },
+EOF
+done
+
+mv coverage.json coverage.json.tmp
+cat >coverage.json <(head -n -1 coverage.json.tmp) <(echo -e "    }\n  ]\n}")
+curl -F json_file=@coverage.json https://coveralls.io/api/v1/jobs