[mkgmap-dev] --bounds not accepting ~ (tilde)

Fri Feb 15 06:46:14 GMT 2013

Hi,

a quick check in the source shows that it is not easy to implement.
We have at least these parms to specify a path or file name or a list of
them: 
--style-file
--bounds
--coastlinefile
--input-file
--output-dir
--license-file
--precomp-sea

Each parm is handled in its own way, esp. the related checks for file
existance  etc. 
A possible solution would be a static utility method like
static public File createFile(String path){
  if (path.startsWith("~/")) ...
 return new File(...)
 }

I am not convinced that it's worth all the work.

Gerd

Rich wrote
> On 2013-02-14 23:48, Marko Mäkelä wrote:
>> Hi Gerd,
>>
>>> to be precise:
>>> I tested with ubuntu default shell.
>>>
>>> java -jar mkgmap.jar ~/xyz.osm.pbf works
>>> java -jar mkgmap.jar --bounds=~/bounds_20121118.zip  xyz.osm
>>> gives file not found error for the bounds file
>>
>> That would probably be the Bourne again shell (bash), which is the
>> default interactive shell in Debian. It will expand ~ at the start of an
>> argument, but not in the middle.
>>
>> man 1 bash says:
>>> Tilde Expansion
>>> If a word begins with an unquoted tilde character (`~'), all of the
>>> characters preceding the first unquoted slash (or all characters, if
>>> there  is no unquoted slash) are considered a tilde-prefix.
>>
>> Note the 'begins with'.
> 
> that's different. that part refers to tilde prefix being ~
> <username>
>  - 
> for example, ~rich would be my home directory, but ~user would be user's 
> home directory.
> 
> that's not bash specific - it is a unix-specific concept, and it is the 
> current user's home directory. it would be really nice if it was also 
> supported in scenarios like --bounds=~/user/bounds
> 
> hmm, turns out wikipedia page on tilde even has a section on "computing"
> :)
> 
> http://en.wikipedia.org/wiki/Tilde#Directories_and_URLs
> 
>> IMO the simplest solution would be to accept this syntax if it is not
>> accepted yet:
>>
>> java -jar mkgmap.jar --bounds ~/bounds_20121118.zip  xyz.osm
>>
>> Then, the ~ would begin a word, and the shell would expand it.
>>
>> A workaround is to write
>>
>> java -jar mkgmap.jar --bounds="$HOME"/bounds_20121118.zip  xyz.osm
>>
>> (I usually use "" around variables in shell scripts, in case the
>> variable value contains $IFS characters, such as spaces. I guess that
>> defining HOME='/home/j. random user' could break some badly written
>> scripts.)
>>
>> 	Marko
> -- 
>   Rich
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