[Rpm-maint] [rpm-software-management/rpm] Implement %foreach builtin to iterate over arguments (PR #1828)

[Michael Schroeder]

The %foreach macro expects a macro name and an iteration body.
It will split the expansion of the specified macro and then expand
the body for each element, setting %1 to the current element.

You can view, comment on, or merge this pull request online at:

  https://github.com/rpm-software-management/rpm/pull/1828

-- Commit Summary --

  * <a href="https://github.com/rpm-software-management/rpm/pull/1828/commits/322a0442bdf2f03bbff5a2541dd41dcc2c228541">Split out doExpandThisMacro() helper</a>
  * <a href="https://github.com/rpm-software-management/rpm/pull/1828/commits/d57129ebcbd161d5be300e184cd1c2da439e663c">Implement %foreach builtin to iterate over arguments</a>

-- File Changes --

    M rpmio/macro.c (77)
    M tests/rpmmacro.at (14)

-- Patch Links --

https://github.com/rpm-software-management/rpm/pull/1828.patch
https://github.com/rpm-software-management/rpm/pull/1828.diff

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