Use jq instead of awk for the reading of json data from Github API

[dbyio]

Github seems to have changed the json output format of its API endpoints (removing newlines) which breaks the current curl pipe awk parsing used currently to handle a number of things. It's likely this could be fixed with awk, but I think a json-native parsing makes things more durable. Please note that this change makes the jq utility a requirement for using rpi-update.

[popcornmix]

Thanks for the PR. Requiring a new package to be installed before rpi-update works again is a definite downside. This will need some thought.

[popcornmix]

I've just had a look and all four places you've changed seem to be giving the correct responses for me here (with existing awk parsing). Is the changed newline format still visible for you?

[dbyio]

It is:

$ curl -Ls https://api.github.com/repos/Hexxeh/rpi-firmware/commits/master | awk '{print $1}'
{"sha":"27ed1a386e52c24c9eb76b7dd7306a7016fb6669","node_id":"MDY6Q29tbWl0NDA5NTgxMToyN2VkMWEzODZlNTJjMjRjOWViNzZiN2RkNzMwNmE3MDE2ZmI2NjY5","commit":{"author":{"name":"popcornmix","email":"popcornmix@gmail.com","date":"2018-10-23T15:19:02Z"},"committer":{"name":"popcornmix","email":"popcornmix@gmail.com","date":"2018-10-23T15:19:02Z"},"message":"kernel:

And rpi-update failing with *** Invalid hash given

[popcornmix]

Not what I see here:

pi@domnfs:~ $ curl -Ls https://api.github.com/repos/Hexxeh/rpi-firmware/commits/master | awk '{print $1}' |head
{
"sha":
"node_id":
"commit":
"author":
"name":
"email":
"date":
},
"committer":

curl -Ls https://api.github.com/repos/Hexxeh/rpi-firmware/commits/master | awk '{print $1}' |wc
   3387    3387   33912

(i.e. newlines between every line of json).

[dbyio]

Got it:

$ curl -q -Ls https://api.github.com/repos/Hexxeh/rpi-firmware/commits/master | awk '{print $1}' |head -2
{
"sha": 

My dot-curlrc breaking things

[popcornmix]

What was in your dot-curlrc?

[dbyio]

user-agent= masquerading as browser (IE).