[pacman-dev] [PATCH] makepkg: introduce SOURCE_DATE_EPOCH

[Allan McRae]

On 17/04/17 23:37, Andrew Gregory wrote:
> On 04/17/17 at 10:04pm, Allan McRae wrote:
>> On 17/04/17 20:41, Allan McRae wrote:
>>> +	# ensure all elements of the package have the same mtime
>>> +	find . -exec touch -d @$SOURCE_DATE_EPOCH {} \;
>>> +
>>>  	msg2 "$(gettext "Generating .MTREE file...")"
>>> -	list_package_files | LANG=C bsdtar -cnzf .MTREE --format=mtree \
>>> +	list_package_files | LANG=C bsdtar -cnf - --format=mtree \
>>>  		--options='!all,use-set,type,uid,gid,mode,time,size,md5,sha256,link' \
>>> -		--null --files-from - --exclude .MTREE
>>> +		--null --files-from - --exclude .MTREE | gzip -c -f -n > .MTREE
>>> +	touch -d @$SOURCE_DATE_EPOCH .MTREE
>>>  
>>>  	msg2 "$(gettext "Compressing package...")"
>>>  	# TODO: Maybe this can be set globally for robustness
>>>
>>
>> These touch commands have had a -h added.
> 
> touch -h and date %s are not POSIX, are they available everywhere we
> support?
> 
> Why the change to gzip for .MTREE?
> 

A timestamp is embed in a gz file unless gzip -n is used.

A