Merge pull request #1447 from zhuangqh/add-shellcheck

fix: correct shell script format via shellcheck reports

.circleci/Dockerfile

@@ -0,0 +1,25 @@
+# This Dockerfile is used to build an image which is used in circle CI
+# to run the the following check or validation:
+# markdownlint
+# misspell
+# ShellCheck 
+FROM ubuntu:16.04
+
+RUN apt-get update \
+    && apt-get install -y rubygems git curl \
+    && gem install rake \
+    && gem install bundler \
+    && apt-get clean   
+
+# install markdownlint
+RUN git clone https://github.com/markdownlint/markdownlint.git \
+    && cd markdownlint && git checkout v0.4.0 && rake install
+
+# install misspell
+RUN git clone https://github.com/client9/misspell.git \
+    && cd misspell && curl -L -o ./install-misspell.sh https://git.io/misspell && sh ./install-misspell.sh
+
+RUN mv misspell/bin/misspell /usr/local/bin/
+
+# install shellcheck
+RUN apt-get install shellcheck

.circleci/config.yml

@@ -3,9 +3,10 @@
 # Check https://circleci.com/docs/2.0/language-go/ for more details
 version: 2
 jobs:
-  misspell-and-markdown-lint:
+  markdownlint-misspell-shellcheck:
     docker:
-      - image: allencloud/mdlmisspell:v0.1
+      # this image is build from Dockerfile located in ./.circleci/Dockerfile
+      - image: allencloud/pouchlint:v0.1
     working_directory: /go/src/github.com/{{ORG_NAME}}/{{REPO_NAME}}
     steps:
       - checkout
@@ -15,7 +16,12 @@ jobs:
             find  ./ -name  "*.md" | grep -v vendor | grep -v extra |  grep -v commandline |  grep -v .github |  grep -v swagger |  grep -v api |  xargs mdl -r ~MD010,~MD013,~MD024,~MD029,~MD033,~MD036
       - run:
           name: use opensource tool client9/misspell to correct commonly misspelled English words 
-          command: find  ./* -name  "*"  | grep -v extra | grep -v vendor | xargs misspell -error 
+          command: |
+            find  ./* -name  "*"  | grep -v extra | grep -v vendor | xargs misspell -error
+      - run:
+          name: use ShellCheck (https://github.com/koalaman/shellcheck) to check the validateness of shell scripts in pouch repo
+          command: |
+            find ./ -name "*.sh" | grep -v vendor | grep -v extra | xargs shellcheck
 
   code-check:
     docker: 
@@ -52,6 +58,6 @@ workflows:
   version: 2
   ci:
     jobs:
-      - misspell-and-markdown-lint
+      - markdownlint-misspell-shellcheck
       - code-check
       - unit-test

hack/cri-test/test-cri.sh

@@ -17,7 +17,7 @@
 set -o nounset
 set -o pipefail
 
-source $(dirname "${BASH_SOURCE[0]}")/test-utils.sh
+source "$(dirname "${BASH_SOURCE[0]}")/test-utils.sh"
 
 POUCH_SOCK="/var/run/pouchcri.sock"
 
@@ -42,8 +42,8 @@ GOPATH=${GOPATH%%:*}
 # Install CNI first
 mkdir -p /etc/cni/net.d /opt/cni/bin
 
-git clone https://github.com/containernetworking/plugins $GOPATH/src/github.com/containernetworking/plugins
-cd $GOPATH/src/github.com/containernetworking/plugins
+git clone https://github.com/containernetworking/plugins "$GOPATH/src/github.com/containernetworking/plugins"
+cd "$GOPATH/src/github.com/containernetworking/plugins"
 
 ./build.sh
 cp bin/* /opt/cni/bin
@@ -89,26 +89,26 @@ GINKGO=${GOPATH}/bin/ginkgo
 GINKGO_PKG=github.com/onsi/ginkgo/ginkgo
 
 # Install critest
-if [ ! -x "$(command -v ${CRITEST})" ]; then
+if [ ! -x "$(command -v "${CRITEST}")" ]; then
   go get -d ${CRITOOL_PKG}/...
-  cd ${GOPATH}/src/${CRITOOL_PKG}
+  cd "${GOPATH}/src/${CRITOOL_PKG}"
   git fetch --all
-  git checkout ${CRITOOL_VERSION}
+  git checkout "${CRITOOL_VERSION}"
   make
 fi
-which ${CRITEST}
+which "${CRITEST}"
 
 # Install ginkgo
-if [ ! -x "$(command -v ${GINKGO})" ]; then
+if [ ! -x "$(command -v "${GINKGO}")" ]; then
   go get -u ${GINKGO_PKG}
 fi
-which ${GINKGO}
+which "${GINKGO}"
 
-mkdir -p ${REPORT_DIR}
-test_setup ${REPORT_DIR}
+mkdir -p "${REPORT_DIR}"
+test_setup "${REPORT_DIR}"
 
 # Run cri validation test
-sudo env PATH=${PATH} GOPATH=${GOPATH} ${CRITEST} --runtime-endpoint=${POUCH_SOCK} --ginkgo.focus="${CRI_FOCUS}" --ginkgo.skip="${CRI_SKIP}"
+sudo env PATH="${PATH}" GOPATH="${GOPATH}" "${CRITEST}" --runtime-endpoint=${POUCH_SOCK} --ginkgo.focus="${CRI_FOCUS}" --ginkgo.skip="${CRI_SKIP}"
 test_exit_code=$?
 
 test_teardown

hack/cri-test/test-utils.sh

@@ -15,13 +15,13 @@
 # limitations under the License.
 
 ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-. ${ROOT}/versions
+. "${ROOT}/versions"
 # POUCH_FLAGS are the extra flags to use when start pouchd.
 POUCH_FLAGS=${POUCH_FLAGS:-""}
 # RESTART_WAIT_PERIOD is the period to wait before restarting pouchd/containerd.
 RESTART_WAIT_PERIOD=${RESTART_WAIT_PERIOD:-10}
 
-POUCH_SOCK=/var/run/pouchcri.sock
+# POUCH_SOCK=/var/run/pouchcri.sock
 
 pouch_pid=
 containerd_pid=
@@ -35,22 +35,22 @@ test_setup() {
     echo "containerd is not installed, please run hack/make.sh"
     exit 1
   fi
-  containerd_pid_command=`pgrep containerd`
+  containerd_pid_command=$(pgrep containerd)
   containerd_pid=${containerd_pid_command}
   if [ ! -n "${containerd_pid}" ]; then
-    keepalive "/usr/local/bin/containerd" ${RESTART_WAIT_PERIOD} &> ${report_dir}/containerd.log &
+    keepalive "/usr/local/bin/containerd" "${RESTART_WAIT_PERIOD}" &> "${report_dir}/containerd.log" &
     containerd_pid=$!
   fi
   # Wait for containerd to be running by using the containerd client ctr to check the version
   # of the containerd server. Wait an increasing amount of time after each of five attempts
   readiness_check "ctr version"
 
   # Start pouchd
-  pouch_pid_command=`pgrep pouchd`
+  pouch_pid_command=$(pgrep pouchd)
   pouch_pid=${pouch_pid_command}
   if [ ! -n "${pouch_pid}" ]; then
     keepalive "pouchd --enable-cri --sandbox-image=gcr.io/google_containers/pause-amd64:3.0 ${POUCH_FLAGS}" \
-	  ${RESTART_WAIT_PERIOD} &> ${report_dir}/pouch.log &
+	  "${RESTART_WAIT_PERIOD}" &> "${report_dir}/pouch.log" &
     pouch_pid=$!
   fi
   readiness_check "pouch version"
@@ -71,11 +71,11 @@ test_teardown() {
 # keepalive process is eventually killed in test_teardown.
 keepalive() {
   local command=$1
-  echo ${command}
+  echo "${command}"
   local wait_period=$2
   while true; do
     ${command}
-    sleep ${wait_period}
+    sleep "${wait_period}"
   done
 }
 

hack/generate-swagger-models.sh

@@ -7,4 +7,4 @@
 # Get the absolute path of this file
 DIR="$( cd "$( dirname "$0"  )" && pwd  )"
 
-swagger generate model -f $DIR/../apis/swagger.yml -t $DIR/../apis -m types
+swagger generate model -f "$DIR/../apis/swagger.yml" -t "$DIR/../apis" -m types

hack/install_lxcfs_on_centos.sh

@@ -5,14 +5,14 @@
 #
 
 yes | yum install autotools-dev m4 autoconf2.13 autobook autoconf-archive gnu-standards autoconf-doc libtool
-yes | yum install fuse-devel.$(uname -p)
-yes | yum install pam-devel.$(uname -p)
-yes | yum install fuse.$(uname -p)
+yes | yum install "fuse-devel.$(uname -p)"
+yes | yum install "pam-devel.$(uname -p)"
+yes | yum install "fuse.$(uname -p)"
 
 TMP=$(mktemp -d)
-trap "rm -rf $TMP" EXIT
+trap 'rm -rf "$TMP"' EXIT
 
-cd $TMP &&
+cd "$TMP" &&
 git clone -b stable-2.0 https://github.com/lxc/lxcfs.git &&
 cd lxcfs