Rake task

ruby-talk
1

Hi,

How can I make downloading a file a prerequisite of a subsequent task--
for example, I want to download a zip file (from github) and subsequently
unzip it:

-- snip

file 'myProg.zip'

desc 'fetch'
task :fetch => 'myProg.zip' do
  name = 'myProg'
  url = 'https://github.com/user/myProg/archive/master.zip
<https://github.com/dominik-bln/CERMINE/archive/master.zip>'
  CurbFetch::fetch name, url #
fetches and unzips
  FileUtils.mv 'myProg-master', name # moves to
name
  FileUtils.rm_rf 'myProg-master'
end

directory 'myProg' => :fetch

desc 'build'
task :build => 'myProg' do
  Dir.chdir 'myProg'
# change into dir
  system( 'mvn compile assembly:single' ) # run maven
end

-- snip

But this doesn't work as I intended, as

$ rake build

always causes the fetch task to be run. What am I doing wrong?

Thanks, Joe

2

Hi Joe,

Have you tried using a file task on file creation task? I believe one of
those should do what you want...

···

On 05/04/2015 10:48:43, Joe Gain wrote:

Hi,

How can I make downloading a file a prerequisite of a subsequent task--
for example, I want to download a zip file (from github) and subsequently
unzip it:

-- snip

file 'myProg.zip'

desc 'fetch'
task :fetch => 'myProg.zip' do
  name = 'myProg'
  url = 'https://github.com/user/myProg/archive/master.zip
<https://github.com/dominik-bln/CERMINE/archive/master.zip&gt;&#39;
  CurbFetch::fetch name, url #
fetches and unzips
  FileUtils.mv 'myProg-master', name # moves to
name
  FileUtils.rm_rf 'myProg-master'
end

directory 'myProg' => :fetch

desc 'build'
task :build => 'myProg' do
  Dir.chdir 'myProg'
# change into dir
  system( 'mvn compile assembly:single' ) # run maven
end

-- snip

But this doesn't work as I intended, as

$ rake build

always causes the fetch task to be run. What am I doing wrong?

Thanks, Joe

--
Raj Sahae
408.230.8531

3

Sorry, "on" => "or"

file task OR file creation task

···

On 05/04/2015 02:05:49, Raj Sahae wrote:

Hi Joe,

Have you tried using a file task on file creation task? I believe one of
those should do what you want...

Class: Rake::FileTask (Ruby 2.2.2)
Class: Rake::FileCreationTask (Ruby 2.2.2)

On 05/04/2015 10:48:43, Joe Gain wrote:
> Hi,
>
> How can I make downloading a file a prerequisite of a subsequent task--
> for example, I want to download a zip file (from github) and subsequently
> unzip it:
>
> -- snip
>
> file 'myProg.zip'
>
> desc 'fetch'
> task :fetch => 'myProg.zip' do
> name = 'myProg'
> url = 'https://github.com/user/myProg/archive/master.zip
> <https://github.com/dominik-bln/CERMINE/archive/master.zip&gt;&#39;
> CurbFetch::fetch name, url #
> fetches and unzips
> FileUtils.mv 'myProg-master', name # moves to
> name
> FileUtils.rm_rf 'myProg-master'
> end
>
> directory 'myProg' => :fetch
>
> desc 'build'
> task :build => 'myProg' do
> Dir.chdir 'myProg'
> # change into dir
> system( 'mvn compile assembly:single' ) # run maven
> end
>
> -- snip
>
> But this doesn't work as I intended, as
>
> $ rake build
>
> always causes the fetch task to be run. What am I doing wrong?
>
> Thanks, Joe

--
Raj Sahae
408.230.8531

--
Raj Sahae
408.230.8531

4

Ugh, double sorry. Super tired and didn't read your code snippet
correctly.

Maybe try replacing your existing file task with a file creation task?
That way if the file exists at all, the task shouldn't be run.

···

On 05/04/2015 02:07:52, Raj Sahae wrote:

Sorry, "on" => "or"

file task OR file creation task

On 05/04/2015 02:05:49, Raj Sahae wrote:
> Hi Joe,
>
> Have you tried using a file task on file creation task? I believe one of
> those should do what you want...
>
> Class: Rake::FileTask (Ruby 2.2.2)
> Class: Rake::FileCreationTask (Ruby 2.2.2)
>
>
> On 05/04/2015 10:48:43, Joe Gain wrote:
> > Hi,
> >
> > How can I make downloading a file a prerequisite of a subsequent task--
> > for example, I want to download a zip file (from github) and subsequently
> > unzip it:
> >
> > -- snip
> >
> > file 'myProg.zip'
> >
> > desc 'fetch'
> > task :fetch => 'myProg.zip' do
> > name = 'myProg'
> > url = 'https://github.com/user/myProg/archive/master.zip
> > <https://github.com/dominik-bln/CERMINE/archive/master.zip&gt;&#39;
> > CurbFetch::fetch name, url #
> > fetches and unzips
> > FileUtils.mv 'myProg-master', name # moves to
> > name
> > FileUtils.rm_rf 'myProg-master'
> > end
> >
> > directory 'myProg' => :fetch
> >
> > desc 'build'
> > task :build => 'myProg' do
> > Dir.chdir 'myProg'
> > # change into dir
> > system( 'mvn compile assembly:single' ) # run maven
> > end
> >
> > -- snip
> >
> > But this doesn't work as I intended, as
> >
> > $ rake build
> >
> > always causes the fetch task to be run. What am I doing wrong?
> >
> > Thanks, Joe
>
> --
> Raj Sahae
> 408.230.8531

--
Raj Sahae
408.230.8531

--
Raj Sahae
408.230.8531

5

Ugh, double sorry. Super tired and didn't read your code snippet
correctly.

Maybe try replacing your existing file task with a file creation task?
That way if the file exists at all, the task shouldn't be run.

Thanks Raj,

I was looking at the task from the wrong perspective:

file 'myProg.zip' do
  url = 'https://github.com/dominik-bln/CERMINE/archive/master.zip&#39;
  CurbFetch::fetch 'myProg', url
end

directory 'myProg' => 'myProg.zip' do
  FileUtils.mv 'CERMINE-master', 'myProg'
  FileUtils.rm_rf 'CERMINE-master'
end

desc 'build myProg'
task :build => 'myProg' do
  Dir.chdir 'myProg'
  system( 'mvn compile assembly:single' )
end

···

On Mon, May 4, 2015 at 11:12 AM, Raj Sahae <rajsahae@gmail.com> wrote:

On 05/04/2015 02:07:52, Raj Sahae wrote:
> Sorry, "on" => "or"
>
> file task OR file creation task
>
> On 05/04/2015 02:05:49, Raj Sahae wrote:
> > Hi Joe,
> >
> > Have you tried using a file task on file creation task? I believe one
of
> > those should do what you want...
> >
> > Class: Rake::FileTask (Ruby 2.2.2)
> >
Class: Rake::FileCreationTask (Ruby 2.2.2)
> >
> >
> > On 05/04/2015 10:48:43, Joe Gain wrote:
> > > Hi,
> > >
> > > How can I make downloading a file a prerequisite of a subsequent
task--
> > > for example, I want to download a zip file (from github) and
subsequently
> > > unzip it:
> > >
> > > -- snip
> > >
> > > file 'myProg.zip'
> > >
> > > desc 'fetch'
> > > task :fetch => 'myProg.zip' do
> > > name = 'myProg'
> > > url = 'https://github.com/user/myProg/archive/master.zip
> > > <https://github.com/dominik-bln/CERMINE/archive/master.zip&gt;&#39;
> > > CurbFetch::fetch name, url #
> > > fetches and unzips
> > > FileUtils.mv 'myProg-master', name #
moves to
> > > name
> > > FileUtils.rm_rf 'myProg-master'
> > > end
> > >
> > > directory 'myProg' => :fetch
> > >
> > > desc 'build'
> > > task :build => 'myProg' do
> > > Dir.chdir 'myProg'
> > > # change into dir
> > > system( 'mvn compile assembly:single' ) # run
maven
> > > end
> > >
> > > -- snip
> > >
> > > But this doesn't work as I intended, as
> > >
> > > $ rake build
> > >
> > > always causes the fetch task to be run. What am I doing wrong?
> > >
> > > Thanks, Joe
> >
> > --
> > Raj Sahae
> > 408.230.8531
>
> --
> Raj Sahae
> 408.230.8531

--
Raj Sahae
408.230.8531

--
joe gain

jacob-burckhardt-str. 16
78464 konstanz
germany

+49 (0)7531 60389

(...otherwise in ???)