The bumprev tool and the include files it creates are what we use
internally to give version numbers to system ROM modules, disk-based
devices and libraries, and 2.0 Workbench and Extras commands.  Bumprev
creates or updates three files -- a name_rev.rev file which contains
the current revision number, and the C and assembler include files
called name_rev.h and name_rev.i.  These include files contain #defines
(.h) or macros (.i) to define the name, version, revision, and date of
your program in a variety of string and numeric formats.

By using the appropriate include file in one or more of your code
modules, you can use these #defines (or macros) in place of hardcoded
version and revision information.  This way, whenever you ``bumprev''
your revision files and recompile (or reassemble) your program, all
version, revision, and date references in your program will be
automatically updated.  You can even include a bumprev call in your
makefile for automatic revision bumping on every make (although this
can update the version number more often than is really necessary).


The usage of bumprev is:    bumprev <version> <name_rev>

For example:                bumprev 37 myapp_rev

The first time you use the above example bumprev call, it creates a
myapp_rev.rev file containing ``1'', and myapp_rev.h and .i files
containing a variety of version and revision #defines (or macros) for
version 37.1.  The next time you use the same bumprev command it
updates the files so that all #defines (or macros) are for version
37.2.

Bumprev does have some caveats.  If you accidently type ``bumprev 37
myapp'' (instead of myapp_rev), bumprev will gladly overwrite any
myapp.h or myapp.i file you happen to have rather than complain or
automatically insert _rev into the output file names.  Also, to make a
major version switch (for example from 36 to 37), you must first delete
the myapp_rev.rev file to make bumprev start the revisions over again
at 1.  Note that the 2.0 convention is for a major version number of 37
(to match the OS major version).

Here are example _rev.h and _rev.i files as generated by bumprev, and
fragments of C and assembler code which include and reference these
files.

Example myapp_rev.h generated by bumprev:


#define      VERSION       37
#define      REVISION      1
#define      DATE          "20.3.91"
#define      VERS          "myapp 37.1"
#define      VSTRING       "myapp 37.1 (20.3.91)\n\r"
#define      VERSTAG       "\0$VER: myapp 37.1 (20.3.91)"


Code example which includes myapp_rev.h:


/* myapp.c */

#include <exec/types.h>
#include <dos/dos.h>

/* stdlib.h and stdio.h contain prototypes for exit and printf.
 * Amiga.lib IO users could instead use <clib/alib_protos.h>
 *  and  <clib/alib_stdio_protos.h>
 */
#include <stdlib.h>
#include <stdio.h>
#include "myapp_rev.h"


/* NOTE: we reference VERSTAG version string for C:VERSION to find */
UBYTE versiontag[] = VERSTAG;

/* NOTE: we concatenate program name and version (VERS) with our
copyright */
UBYTE Copyright[] = VERS "Copyright(c) 1991 CATS Inc. All Rights Reserved";


void main(int argc,char **argv)
    {
    /* Print our Copyright string.
     * Copyright string includes our myapp _rev.h version and date
     */
    printf("%s\n",Copyright);
    exit(RETURN_OK);
    }


Example mylib_rev.i generated by bumprev:


VERSION     EQU  37
REVISION    EQU   1
DATE       MACRO
    dc.b    '20.3.91'
    ENDM
VERS       MACRO
    dc.b    'mylib 37.1'
    ENDM
VSTRING    MACRO
    dc.b    'mylib 37.1 (20.3.91)',13,10,0
    ENDM
VERSTAG    MACRO
    dc.b    0,'$VER: mylib 37.1 (20.3.91)',0
    ENDM


Code example which includes mylib_rev.i:


* This is an example of an initial library code module
* Mylib_rev.i is generated with bumprev

      nolist
        include "exec/types.i"
        include "exec/initializers.i"
        include "exec/libraries.i"
        include "exec/resident.i"

        include "mylib.i"
        include "mylib_rev.i"       ; Bumprev revision include file
      list

            ; external
        xref    InitLib             ; init function
        xref    FuncTable           ; function table
        xref    EndSkip             ; End of code segment


; code at start of file in case anyone tries to execute library as program

        entry   FalseStart
FalseStart
        moveq   #-1,d0
        rts


ResidentNode
        dc.w    RTC_MATCHWORD       ; RT_MATCHWORD
        dc.l    ResidentNode        ; RT_MATCHTAG
        dc.l    EndSkip             ; RT_ENDSKIP
        dc.b    RTF_AUTOINIT        ; RT_FLAGS
        dc.b    VERSION             ; RT_VERSION       ;From mylib_rev.i
        dc.b    NT_LIBRARY          ; RT_TYPE
        dc.b    0                   ; RT_PRI
        dc.l    LibName             ; RT_NAME
        dc.l    IDString            ; RT_IDString      ;Contains VSTRING
        dc.l    InitTable           ; RT_SIZE          ;  from mylib_rev.i



LibName:        DC.B    'mylib.library',0
IDString:       VSTRING                                ;From mylib_rev.i
        CNOP    0,2

InitTable
        dc.l    XMyLibBase_Size
        dc.l    FuncTable
        dc.l    DataTable
        dc.l    InitLib

DataTable
            ; standard library stuff
        INITBYTE    LN_TYPE,NT_LIBRARY
        INITLONG    LN_NAME,LibName
        INITBYTE    LIB_FLAGS,LIBF_SUMUSED!LIBF_CHANGED
        INITWORD    LIB_VERSION,VERSION                ;From mylib_rev.i
        INITWORD    LIB_REVISION,REVISION              ;From mylib_rev.i
        INITLONG    LIB_IDSTRING,IDString              ;Contains VSTRING
                                                       ;  from mylib_rev.i
            ; library specific stuff

            ; end of init list
        dc.l        0

        end

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