conan graph build-order-merge

$ conan graph build-order-merge -h
WARN: Downgrading cache from Conan 2.8.1 to 2.6.0
usage: conan graph build-order-merge [-h] [-f FORMAT] [-v [V]] [-cc CORE_CONF]
                                     [--file [FILE]] [--reduce]

Merge more than 1 build-order file.

options:
  -h, --help            show this help message and exit
  -f FORMAT, --format FORMAT
                        Select the output format: json, html
  -v [V]                Level of detail of the output. Valid options from less
                        verbose to more verbose: -vquiet, -verror, -vwarning,
                        -vnotice, -vstatus, -v or -vverbose, -vv or -vdebug,
                        -vvv or -vtrace
  -cc CORE_CONF, --core-conf CORE_CONF
                        Define core configuration, overwriting global.conf
                        values. E.g.: -cc core:non_interactive=True
  --file [FILE]         Files to be merged
  --reduce              Reduce the build order, output only those to build.
                        Use this only if the result will not be merged later
                        with other build-order

As described in the conan graph build-order command, there are 2 types of order recipe and configuration. Only build-orders of the same type can be merged together, otherwise the command will return an error.

Note that only build-orders that haven’t been reduced with --reduce can be merged.

The result of merging the different input files can be also reduced with the conan graph build-order-merge --reduce argument, and the behavior will be the same, leave only the elements that need to be built from source.