add support for using influx-cli from docker

Dockerfile

@@ -0,0 +1,11 @@
+FROM google/golang
+
+RUN apt-get update && \
+  DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends libreadline-gplv2-dev
+
+WORKDIR /gopath/src/influx-cli
+ADD . /gopath/src/influx-cli/
+RUN go get influx-cli
+
+CMD []
+ENTRYPOINT ["/gopath/bin/influx-cli"]

README.md

@@ -138,3 +138,37 @@ ANY command above can be subject to:
 > <filename>    : redirect the output into a file
 
 ```
+
+docker
+------
+
+If you don't have a golang environment available, you can also use influx-cli
+from a docker container:
+
+```
+$ docker build -t dieterbe/influx-cli .
+
+$ docker run --rm -ti dieterbe/influx-cli
+```
+
+Once the `dieterbe/influx-cli` container has been built, you can also use the
+`docker-influx-cli.sh` script to run influx-cli through docker.
+
+By default, `docker-influx-cli.sh` will use InfluxDB configuration from
+`~/.influxrc` config file, but you can provide your own InfluxDB config file to
+the script.
+
+Here are some usage examples:
+```
+# enter influx-cli prompt with default config file
+$ ./docker-influx-cli.sh
+
+# enter influx-cli prompt with custom my.influxrc config file
+$ ./docker-influx-cli.sh my.influxrc
+
+# run a single query
+$ echo "select * from /pattern/ limit 10" | ./docker-influx-cli.sh
+
+# drop all series that match a request
+$ echo "list series /pattern/" | ./docker-influx-cli.sh | sed 's/.*/drop series "&"/' | ./docker-influx-cli.sh
+```

docker-influx-cli.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+DOCKER_OPTIONS="--rm -i"
+CFG="${1:-$HOME/.influxrc}"
+CFGPATH=$(readlink -f "$CFG")
+
+if [ -f "$CFGPATH" ]
+then
+    # add volume to influx-cli config file
+    DOCKER_OPTIONS="$DOCKER_OPTIONS -v $CFGPATH:/root/.influxrc"
+else
+    >&2 echo "Cannot find influx-cli config file: $CFGPATH"
+fi
+
+if [[ -t 0 ]]
+then
+    # stdin is coming from the terminal
+    DOCKER_OPTIONS="$DOCKER_OPTIONS -t"
+fi
+
+docker run $DOCKER_OPTIONS dieterbe/influx-cli