Elektra
0.8.25
|
This plugin uses if-then-else like conditions. It also works as global plugin.
Stored in the metakey check/condition
to validate data is:
(IF-condition) ? (THEN-condition) : (ELSE-condition)
where the ELSE-condition is optional
Condition: Key
Operation `('String' | '1234.56' | Key | '')`
Operations: !=, ==, <, <=, =>, >, :=
, where:
:=
is used to set a key value(! a/key)
evaluates to true if the key a/key
doesn't exist, to false if it exists.
(IF-condition) ? ('ThenValue') : ('ElseValue')
Depending on if the condition is met, either 'ThenValue' or 'ElseValue' will be assigned as key value if the metakey assign/condition
is used.
Multiple conditions can be nested and combined using parentheses and &&
(logical AND) or ||
(logical OR). Additional parentheses must be used to form valid conditions again. (
(condition 1) && (condition 2)
)
The condition/validsuffix
can be used to define a list of valid suffixes to numeric values. If two operants have the same valid suffix or one of them no suffix they will be treated by their numeric value ignoring their suffix. `condition/validsuffix = 'm', 'cm', 'km'would treat
2.3mjust as the numeric value
2.3` when comparing to another value having the same or no suffix.
Keynames are all either relative to to-be-tested key (starting with ./
or ../
), relative to the parentkey (starting with @/
) or absolute (e.g. system/key
).
It's also possible to test multiple conditions using check/condition/{any,all,none}
as a meta array. Where any
means that at least one statement has to evaluate to true, all
that all statements have to evaluate to true, and none
that no statement is allowed to evaluate to false (default). For multiple assign statements use assign/condition
as a meta array. The first assign/condition/#
statement that evaluates to true will be assigned and the rest ignored.
(this/key != 'value') ? (then/key == some/other/key) : (or/key <= '125')
Meaning: IF this/key
NOT EQUAL TO 'value'
THEN then/key
MUST EQUAL some/other/key
ELSE or/key
MUST BE LESS THAN 125
Another full example:
Assignment example:
Global plugin example:
```
kdb set user/tests/msr kdb export system/elektra/globalplugins > $(kdb get user/tests/msr)
sudo kdb mount main.ini /tests/conditionals ni sudo kdb mount sub.ini /tests/conditionals/sub ini
sudo kdb global-mount conditionals || $(exit 0)
echo 'key1 = val1' > kdb file /tests/conditionals
echo '[key1]' >> kdb file /tests/conditionals
echo "check/condition = (./ == 'val1') ? (../sub/key == 'true')" >> kdb file /tests/conditionals
echo "key = false" > kdb file /tests/conditionals/sub
kdb export /tests/conditionals ini #> sub/key = false #> # check/condition = (./ == 'val1') ? (../sub/key == 'true') #> key1 = val1
kdb set /tests/conditionals/sub/key true
kdb export /tests/conditionals ini #> sub/key = true #> # check/condition = (./ == 'val1') ? (../sub/key == 'true') #> key1 = val1
kdb rm -r /tests/conditionals sudo kdb umount /tests/conditionals/sub sudo kdb umount /tests/conditionals
sudo kdb global-umount conditionals
kdb rm -r system/elektra/globalplugins kdb import system/elektra/globalplugins < $(kdb get user/tests/msr) rm $(kdb get user/tests/msr) kdb rm user/tests/msr ```