[ZEPPELIN-1190] Visit and switch notebook revisions

[khalidhuseynov]

What is this PR for?

This is to enable switching between revisions and being able to set Head/current note to one of those revisions. Currently notes are editable when switching between them, next step after this PR would be make them non-editable during revision switches.

What type of PR is it?

Improvement | Feature

Todos

• - routes and switching revisions
• - set revision button and api
• - test for setting revision

What is the Jira issue?

ZEPPELIN-1190

How should this be tested?

set config in conf/zeppelin-env.sh

export ZEPPELIN_NOTEBOOK_STORAGE="org.apache.zeppelin.notebook.repo.GitNotebookRepo"

and switch between notes in note action bar, as well as set certain revisions as shown below

Screenshots (if appropriate)

Questions:

• Does the licenses files need update? no
• Is there breaking changes for older versions? no
• Does this needs documentation? no?

[khalidhuseynov]

this is ready for review. @Leemoonsoo let me know if you have any feedback regarding this one.

[Leemoonsoo]

Tested and it works well. Great work @khalidhuseynov.

But when i visit revision, shouldn't it be immutable? i can still edit and run.

[khalidhuseynov]

@Leemoonsoo yes right currently it's editable and runnable, which is updated in PR description. Actually I want to add additional offline or report-offline mode and basically switch to that mode when viewing revisions. I think that's quite separate issue from this one and can be addressed right after this one, what do you think?

[Leemoonsoo]

@khalidhuseynov sounds good.

Let's wait for CI becomes green. Other than that, Looks good to me.

[khalidhuseynov]

created issue under ZEPPELIN-1745 for second part

[khalidhuseynov]

not sure why only one profile keeps failing with all rest api tests

[khalidhuseynov]

rebased from master, and 6th profile keeps failing with Zeppelin shutting down because of no SPARK_HOME. So initially fails to untar spark package:

+mkdir -p .spark-dist
+cd .spark-dist
+[[ ! -f spark-1.4.1-bin-hadoop2.3.tgz ]]
+cp spark-1.4.1-bin-hadoop2.3.tgz ..
+cd ..
+tar zxf spark-1.4.1-bin-hadoop2.3.tgz
gzip: stdin: unexpected end of file
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
+echo 'Unable to extract spark-1.4.1-bin-hadoop2.3.tgz'
Unable to extract spark-1.4.1-bin-hadoop2.3.tgz
+rm -rf spark-1.4.1-bin-hadoop2.3
+rm -f spark-1.4.1-bin-hadoop2.3.tgz
+set +xe

and then in tests:

02:22:06,298 INFO org.apache.zeppelin.rest.AbstractTestRestApi:181 - Test Zeppelin stared.
SPARK HOME detected null
02:22:06,302 INFO org.apache.zeppelin.rest.AbstractTestRestApi:298 - Terminating test Zeppelin...

which fails all rest api tests. obviously this is not related to this PR, although not sure why spark untar keeps failing in same profile. logs are here.

[khalidhuseynov]

@Leemoonsoo CI is finally green, I think it's ready to go

[Leemoonsoo]

LGTM and merge to master if there're no further discussions.
@khalidhuseynov Great work!