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Change type of program options to 'IO [Options]'
Some options have defaults that depend on the environment, and wecould handle these in two ways:
- use a place-holder value (e.g. data X a = Default | Custom a) that is later read from the environment- move the options list to IO monad, where it can read the...
Fix a few issues found by newer hlint
Testing with a newer hlint found a few minor issues; but all are real,valid recommendations:
- don't use "if cond then f x else f y", but "f (if cond then x else y)" - "if a then b else True" is equivalent to the simpler "not a || b"...
Use exitErr instead of explicit error message and exitWith
Furthermore, a few messages have their capitalisation changed (fixed).
Signed-off-by: Helga Velroyen <helgav@google.com>Signed-off-by: Iustin Pop <iustin@google.com>Reviewed-by: Iustin Pop <iustin@google.com>
Define the actual arguments that are supported by programs
This defines the arguments supported and then modifies the--help-completion output to include them too.
Signed-off-by: Iustin Pop <iustin@google.com>Reviewed-by: Michael Hanselmann <hansmi@google.com>
Remove generic options from individual programs
Currently, we test and require that each individual program (hbal,etc.) defines/supports the generic options (currently --help and--version). Even with the test, this is not optimal, since it requireschanges in many places whenever we modify the list of generic options,...
Further hlint fixes
Commit 2cdaf22, “Re-enable standard hlint warnings”, got it almostright. The only problem is that (confusingly) the default set of hintsis not in HLint.Default, but in HLint.HLint (it includes Default andsome built-ins).
After changing the lint file to correctly include the defaults, we had...
Re-enable standard hlint warnings
Commit 5a1e31b4 (Add infrastructure for, and two extra hlint rules)was intended to add two extra hlint rules, but I didn't realise atthat time that "--hint" when first used overrides the built-inlints. As such, since then we were basically running with just those...
hcheck: add two simple type aliases for readability
The same types are reused a couple of times, so let's add a couple oftype aliases for easier change later and readability.
Signed-off-by: Iustin Pop <iustin@google.com>Reviewed-by: Agata Murawska <agatamurawska@google.com>
hcheck: rework output mode
Looking at the output of hcheck, in human readable mode, it looks likeit always starts with a blank line. This is not nice, so I wanted toredo this to start cleanly.
However, looking at the code, I realised that we need some internal...
hcheck: reword and fix typo in instance/offline msg
Remove can_rebalance functionality from hcheck
Since hbal can now run rebalances even in the presence of splitinstances, we can remove this check and always run the rebalance.
Fix a few style issue in hcheck
This fixes a couple of issue I've seen while fixing the List import:
- removes over-use of printf with putStr/show- wraps some lines- removes superfluous parentheses in constructs like 'IO (a)'- makes sure that in type signatures, the '->' are placed at the...
Fix old-style import
Commit 1213f9d6 (re)added an old-style import, which fails with recentcompilers.
Signed-off-by: Iustin Pop <iustin@google.com>Reviewed-by: Guido Trotter <ultrotter@google.com>
Style fix in hcheck
Signed-off-by: Agata Murawska <agatamurawska@google.com>Reviewed-by: René Nussbaumer <rn@google.com>
Simplify stats printing
PrintGroupStats and printClusterStats had very similar codestructure. This patch abstracts those two into printStats, making ita little more generic. Also, printStats has its arguments documentedas requested in previous patch series....
Cleaner simulation of rebalance
This replaces the 'if .. then .. else ..' with a large block of code in'else' branch by separating this code into a separate function.
Small reordering and renaming in hcheck
Reordered functions and shortened one function name.
Move 'need rebalance' check from cluster check
As suggested by Rene, we should keep the check separate from printing.
Always print all variables in machine readable version
As discussed in cover letter of patch series introducing hcheck, inmachine readable version we should always print values of all variables.When hbal simulation was not run, FINAL values are equal to INIT values....
Print idx <-> uuid mappings in machine readable mode
As per Iustin Pop's suggestion, we are printing group mappingsfrom group idx (known only to htools) to group uuid, which identifiesthe group uniquely. This is required because group uuid and namemay contain characters such as '-' which are not valid parts of...
Human readable group name improved
Instead of printing group id in human readable version of hcheck,we now print group name.
Print info about ability to rebalance
As suggested during offline discussion, this patch adds a new bashvariable and description field in hcheck, which informs if therebalance was possible. This is to determine if there are splitinstances on the cluster, in which case rebalance is impossible....
Machine readable hcheck functionality
Machine readable output for hcheck.
Human readable hcheck functionality
Full hcheck functionality is implemented in this patch. Hcheck runsper-group checks, provides summary for the entire cluster and simulatesrebalance if required, the printing the modified metrics.In this patch, only the human-readable output is available....
Initial commit for introducting hcheck tool
Introduce infrastructure required to add Hcheck and build itsuccessfuly.