Bug 1169111

Summary: %(echo %1 | tr A-Z a-z) returns %1
Product: [Fedora] Fedora Reporter: Jens Petersen <petersen>
Component: rpmAssignee: Packaging Maintenance Team <packaging-team-maint>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: jzeleny, lkardos, novyjindrich, packaging-team-maint, pknirsch, pnemade
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2014-12-02 07:39:26 UTC Type: Bug
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Description Jens Petersen 2014-11-30 12:21:55 UTC 
Description of problem:
I am wondering if this a bug or expected rpmbuild behaviour:

Version-Release number of selected component (if applicable):
rpm-4.12.0.1-2.fc22
rpm-4.11.3-1.fc20
also on RHEL5

How reproducible:
100%

Steps to Reproduce:
1. Define:

   %global lower() %(echo %1 | tr A-Z a-z)

2. %lower CamelCase

3. %(echo CamelCase | tr A-Z a-z)


Actual results:
2. CamelCase
3. camelcase

Expected results:
2. camelcase

Additional info:
Above is a testcase: I am actually trying to define something
more complicated than %lower inside a packaging macro.
Comment 1 Ľuboš Kardoš 2014-12-01 09:27:24 UTC 
Yes, this is expected behavior. Body of %global is expanded at definition time. So expansion has following steps:

%global lower() %(echo %1 | tr A-Z a-z) => %global %1 
%lower CamelCase => CamelCase

Use "%define" for lazy expansion:

%define lower() %(echo %1 | tr A-Z a-z)
%lower CamelCase => %(echo CamelCase | tr A-Z a-z) => camelcase
Comment 2 Jens Petersen 2014-12-02 03:11:13 UTC 
Okay maybe I gave a bad test-case but I was actually using %define
in my original more complex example but it is not working: re-opening.
Comment 3 Jens Petersen 2014-12-02 07:39:26 UTC 
Nevermind sorry, you're right.

This was caused by my using

%global mymacro()\
%define lower %(echo %1 | tr A-Z a-z)\
:
:

(instead of %define mymacro() ...).