[Rpm-maint] [rpm-software-management/rpm] rpmbuild: make it possible to not include SPEC tag (rpm-4.17 compat behavior) (Issue #2727)

[Denys Vlasenko]

For some packages, expanded specfile is so big, it causes srpm headers to exceed 16 mb, which then can't be extracted by old rpms (pre 4.13) - they throw an error, "headerRead failed: hdr data: BAD, no. of bytes(20966277) out of range".

The code in question is in build/pack.c:

    /* Include spec in parsed and expanded form */
    headerPutString(sourcePkg->header, RPMTAG_SPEC, getStringBuf(spec->parsed));

For my purposes, a magic envvar would work best, a-la

   char *NO_SPEC_TAG = getenv("RPMBUILD_NO_SPEC_TAG");

   if (!NO_SPEC_TAG || atoi(NO_SPEC_TAG) != 1) {
      /* Include spec in parsed and expanded form */
      headerPutString(sourcePkg->header, RPMTAG_SPEC, getStringBuf(spec->parsed));
   }




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