ci: run coverity from travis's cron

Instead of trying to run coverity builds during the regular PR process,
run them during a regularly scheduled cron process.  These only need to
run nightly, so it makes sense to bring them out of the PR process.

(cherry picked from commit 6b92368c)

.travis.yml

@@ -48,10 +48,6 @@ matrix:
      compiler: gcc
  include:
    - compiler: gcc
-     env: COVERITY=1
-     os: linux
-     dist: trusty
-   - compiler: gcc
      env:
        - LEAK_CHECK=valgrind
          CMAKE_OPTIONS="-DBUILD_CLAR=ON -DBUILD_EXAMPLES=OFF -DDEBUG_POOL=ON -DCMAKE_BUILD_TYPE=Debug"
@@ -67,8 +63,8 @@ install:
 script:
  - mkdir build
  - cd build
- - if [ "$COVERITY" ]; then ../ci/coverity.sh; fi
- - if [ -z "$COVERITY" ]; then ../ci/build.sh && ../ci/test.sh; fi
+ - if [ "$TRAVIS_EVENT_TYPE" = "cron" ]; then ../ci/coverity.sh; fi
+ - if [ "$TRAVIS_EVENT_TYPE" != "cron" ]; then ../ci/build.sh && ../ci/test.sh; fi
 
 # Only watch the development and master branches
 branches:

ci/coverity.sh

 #!/bin/bash
-set -e
 
-# Only run this on our branches
-echo "Branch: $TRAVIS_BRANCH  |  Pull request: $TRAVIS_PULL_REQUEST  |  Slug: $TRAVIS_REPO_SLUG"
-if [ "$TRAVIS_BRANCH" != "master" -o "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_REPO_SLUG" != "libgit2/libgit2" ];
-then
-	echo "Only analyzing the 'master' brach of the main repository."
-	exit 0
-fi
+set -e
 
 # Environment check
 [ -z "$COVERITY_TOKEN" ] && echo "Need to set a coverity token" && exit 1
 
+SOURCE_DIR=${SOURCE_DIR:-$( cd "$( dirname "${BASH_SOURCE[0]}" )" && dirname $( pwd ) )}
+BUILD_DIR=$(pwd)
+
 case $(uname -m) in
 	i?86)				BITS=32 ;;
 	amd64|x86_64)	BITS=64 ;;
@@ -32,28 +28,29 @@ if [ ! -d "$TOOL_BASE" ]; then
 	ln -s "$TOOL_DIR" "$TOOL_BASE"/cov-analysis
 fi
 
-cp ../script/user_nodefs.h "$TOOL_BASE"/cov-analysis/config/user_nodefs.h
+cp "${SOURCE_DIR}/script/user_nodefs.h" "$TOOL_BASE"/cov-analysis/config/user_nodefs.h
 
 COV_BUILD="$TOOL_BASE/cov-analysis/bin/cov-build"
 
 # Configure and build
-cmake .. -DTHREADSAFE=ON
+cmake ${SOURCE_DIR}
+
 COVERITY_UNSUPPORTED=1 \
 	$COV_BUILD --dir cov-int \
 	cmake --build .
 
 # Upload results
 tar czf libgit2.tgz cov-int
-SHA=$(git rev-parse --short HEAD)
+SHA=$(cd ${SOURCE_DIR} && git rev-parse --short HEAD)
 
 HTML="$(curl \
 	--silent \
 	--write-out "\n%{http_code}" \
 	--form token="$COVERITY_TOKEN" \
-	--form email=bs@github.com \
+	--form email=libgit2@gmail.com \
 	--form file=@libgit2.tgz \
 	--form version="$SHA" \
-	--form description="Travis build" \
+	--form description="libgit2 build" \
 	https://scan.coverity.com/builds?project=libgit2)"
 # Body is everything up to the last line
 BODY="$(echo "$HTML" | head -n-1)"
@@ -62,7 +59,7 @@ STATUS_CODE="$(echo "$HTML" | tail -n1)"
 
 echo "${BODY}"
 
-if [ "${STATUS_CODE}" != "201" ]; then
+if [ "${STATUS_CODE}" != "200" -o "${STATUS_CODE}" != "201" ]; then
 	echo "Received error code ${STATUS_CODE} from Coverity"
 	exit 1
 fi