refactor(build): trim leading v from image tag

Using the github tag, docker image tags are
created. As we move the github tags to semver
format, the image tags will end up having a
leading `v` in the tag.

To keep the image tag names consistent with
past releases, the leading `v` will be trimmed
from the travis tag and the rest of the string
will be used for image tag.

Examples:
1.10.0 maps to 1.10.0
v1.10.0 maps to 1.10.0
v1.10.0-custom-RC1 maps to 1.10.0-custom-RC1

Signed-off-by: kmova <[email protected]>

Author: kmova

buildscripts/push

@@ -83,7 +83,11 @@ then
     # Push with different tags if tagged as a release
     # When github is tagged with a release, then Travis will
     # set the release tag in env TRAVIS_TAG
-    TagAndPushImage "${DIMAGE}" "${TRAVIS_TAG}"
+    # Trim the `v` from the TRAVIS_TAG if it exists
+    # Example: v1.10.0 maps to 1.10.0
+    # Example: 1.10.0 maps to 1.10.0
+    # Example: v1.10.0-custom maps to 1.10.0-custom
+    TagAndPushImage "${DIMAGE}" "${TRAVIS_TAG#v}"
     TagAndPushImage "${DIMAGE}" "latest"
   fi;
 else
@@ -103,7 +107,8 @@ then
     # Push with different tags if tagged as a release
     # When github is tagged with a release, then Travis will
     # set the release tag in env TRAVIS_TAG
-    TagAndPushImage "quay.io/${DIMAGE}" "${TRAVIS_TAG}"
+    # Trim the `v` from the TRAVIS_TAG if it exists
+    TagAndPushImage "quay.io/${DIMAGE}" "${TRAVIS_TAG#v}"
     TagAndPushImage "quay.io/${DIMAGE}" "latest"
   fi;
 else