[tor-bugs] #20405 [Metrics/metrics-lib]: create metrics-tools with all of the index.json processing code as first content (was: all of the index.json processing code should be in metrics-lib)

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#20405: create metrics-tools with all of the index.json processing code as first
content
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 Reporter:  iwakeh               |          Owner:  karsten
     Type:  enhancement          |         Status:  new
 Priority:  Medium               |      Milestone:  metrics-lib 1.5.0
Component:  Metrics/metrics-lib  |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:                       |  Actual Points:
Parent ID:                       |         Points:
 Reviewer:                       |        Sponsor:
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Comment (by iwakeh):

 Actually, as was discussed a while ago:

 There should be another lib, `metrics-tools` (working title), that
 contains functionality on one hand needed by Metrics products and on the
 other hand not really in scope of any product.

 The index-json functionality qualifies for being provided by metrics-tools
 as both CollecTor and metrics-lib depend on it, but is out of scope for
 either one.  And, this would shield the actual json-processing lib used,
 e.g. a switch from gson to something better would be easier in future.

 Changing the title to reflect the topic drift.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20405#comment:1>
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