Ticket 5353

Created attachment 7187 [details]
"git diff master" against the change branch

When requesting node/queue/job information using the sinfo and squeue utilities, the fixed-width display of the information is undesirable for machine-parsed cases (see also the primary request in bug 1804). For long-format arguments, using zero-width runs the fields together:

    $ sinfo --Format="nodeaddr:0,cpus:0"
    NODE_ADDRCPUS
    r00n0236
    r00n0336
       :

Using short --format would work, but not every data point available via long-format tags are available in the short format.

This patch implements two new CLI flags to the sinfo and squeue utilities that can be used to produce machine-parseable output.

  - added -D/--delimiter=<DELIM>
    - print a static string between each field displayed
  - added --parseable
    - all fields zero width (print entire thing)
    - w/o explicit -D/--delimiter, a "|" delimiter is implied
  - augmented long-format field name parsing to allow trailing suffixes
    - <field-name>[:[.][<width>][<suffix>]]
    - Example: --Format="nodeaddr:0|,features:0:,cpus:0"

    $ sinfo --Format="nodeaddr:0|,features:0:,cpus:0"
    NODE_ADDR|AVAIL_FEATURES:CPUS
    r00n02|E5-2695,E5-2695v4:36
    r00n03|E5-2695,E5-2695v4:36
       :

  - miscellaneous other fixes
    - addressed leaking list iterators in print functions (early return on error)