Calling GNU/make from a Python Script

[Efrat Regev]

Hello,

I need to call GNU/make from within a Python script. This raised some
problems:
1. The script is not in the directory of the makefile, and changing the
locations of either is not an option. Consequently, the makefile fails,
since it can't find the targets/dependencies.
2. After searching around, it seems that os.system(..) should be avoided
if there's an alternative. Is there one in this case?

Many Thanks!

Efrat

[Rob Williscroft]

Re: Calling GNU/make from a Python Script

Efrat Regev wrote in news:45462091@n ews.bezeqint.ne t in comp.lang.pytho n:

Hello,
>
I need to call GNU/make from within a Python script. This raised some
problems:
1. The script is not in the directory of the makefile, and changing the
locations of either is not an option. Consequently, the makefile fails,
since it can't find the targets/dependencies.
2. After searching around, it seems that os.system(..) should be avoided
if there's an alternative. Is there one in this case?
>

USe the subprocess module, in particular see

Popen: http://docs.python.org/lib/node529.html

and call: http://docs.python.org/lib/node530.html

you will need to use the "cwd" argument.

Rob.
--

http://www.victim-prime.dsl.pipex.com/

[Fredrik Lundh]

Re: Calling GNU/make from a Python Script

Efrat Regev wrote:

1. The script is not in the directory of the makefile, and changing the
locations of either is not an option. Consequently, the makefile fails,
since it can't find the targets/dependencies.

build_dir = "path/to/makefile"

cwd = os.getcwd() # get current directory
try:
os.chdir(build_ dir)
os.system("make ")
finally:
os.chdir(cwd)

2. After searching around, it seems that os.system(..) should be avoided
if there's an alternative. Is there one in this case?

"make" is not an operating system service, no.

</F>

[skip@pobox.com]

Re: Calling GNU/make from a Python Script


Fredrikbuild_di r = "path/to/makefile"

Fredrikcwd = os.getcwd() # get current directory
Fredriktry:
Fredrik os.chdir(build_ dir)
Fredrik os.system("make ")
Fredrikfinally:
Fredrik os.chdir(cwd)

Or even:

os.system("make -C %s" % build_dir)

Skip

[sjdevnull@yahoo.com]

Re: Calling GNU/make from a Python Script

skip@pobox.com wrote:

Fredrikbuild_di r = "path/to/makefile"
>
Fredrikcwd = os.getcwd() # get current directory
Fredriktry:
Fredrik os.chdir(build_ dir)
Fredrik os.system("make ")
Fredrikfinally:
Fredrik os.chdir(cwd)
>
Or even:
>
os.system("make -C %s" % build_dir)

OP specified GNU make, so that works fine, but make sure you're not
going to need to use it with another make before settling on that
alternative. Frederik's works with more versions of make.

[skip@pobox.com]

Re: Calling GNU/make from a Python Script

>os.system("mak e -C %s" % build_dir)

>OP specified GNU make, so that works fine, but make sure you're not
>going to need to use it with another make before settling on that
>alternative. Frederik's works with more versions of make.

Understood. That was the only reason I suggested it.

Skip