Provide Browsh version with git in Dockerfile

Version v1.4.6

Dockerfile

@@ -21,7 +21,10 @@ RUN rm ./setup_firefox.sh && rm .travis.yml
 
 # Setup Browsh
 ADD ./interfacer/contrib/setup_browsh.sh .
-RUN ./setup_browsh.sh
+ADD ./interfacer/src/browsh/version.go .
+RUN VERSION_FILE=version.go ./setup_browsh.sh
+RUN rm ./setup_browsh.sh && rm version.go
+
 # Firefox behaves quite differently to normal on its first run, so by getting
 # that over and done with here when there's no user to be dissapointed means
 # that all future runs will be consistent.
@@ -31,7 +34,6 @@ RUN TERM=xterm script \
       /dev/null \
       >/dev/null & \
       sleep 10
-RUN rm ./setup_browsh.sh && rm manifest.json
 
 CMD ["/app/browsh"]
 

interfacer/contrib/setup_browsh.sh

@@ -10,8 +10,10 @@
 
 set -e
 
-PROJECT_ROOT=$(git rev-parse --show-toplevel)
-version=$($PROJECT_ROOT/contrib/get_browsh_version.sh)
+# This will typically be run inside Docker where we don't have the original
+# source code.
+line=$(cat $VERSION_FILE | grep 'browshVersion')
+version=$(echo $line | grep -o '".*"' | sed 's/"//g')
 
 base='https://github.com/browsh-org/browsh/releases/download'
 release_url="$base/v$version/browsh_${version}_linux_amd64"

interfacer/src/browsh/version.go

@@ -1,3 +1,3 @@
 package browsh
 
-var browshVersion = "1.4.5"
+var browshVersion = "1.4.6"