Job execution

Job are executed by calling the provided interpreter (generally python or bash).

When calling the interpreter, the following environment variable are automatically set, in addition to what is mentioned in the environ attribute (and the like). They must remain untouched:

  • $LD_AUDIT : A variable necessary for autodep when it is set to 'ld_audit'
  • $LD_PRELOAD : A variable necessary for autodep when it is set to 'ld_preload' or 'ld_preload_jemalloc'
  • $LMAKE_AUTODEP_ENV : A variable necessary for autodep in all cases
  • $TMPDIR : The name of a dir which is empty at the start of the job. If the temporary dir is not kept through the use of the keep_tmp attribute or the -t option, this dir is cleaned up at the end of the job execution.

After job execution, a checksum is computed on all generated files, whether they are allowed or not, except ignored targets (those marked with the ignore attribute).

The job is reported ok if all of the following conditions are met:

  • Job execution (as mentioned below) is successful.
  • All static targets are generated
  • All written files are allowed (either appear as target, side target or are dynamically allowed by a call to ltarget or lmake.target)
  • Nothing is written to stderr, or the stderr_ok attribute is set.

if cmd is a str

Because this attribute undergo dynamic evaluation as described in the cmd rule attribute, there is not further specificities.

The job execution is successful (but see above) if the interpreter return code is 0.

if it is a function

In that case, this attribute is called to run the job.

During evaluation, its global dict is populated to contain values referenced in these functions. Values may come from (by order of preference):

  • The stems, targets, deps, resources, side targets and side deps, as named in their respective dict.
  • stems, targets, deps, resources that contain their respective whole dict.
  • if a single target was specified with the target attribute, that target is named target.
  • if a single dep was specified with the dep attribute, that dep is named dep.
  • Any attribute defined in the class, or a base class (as for normal python attribute access).
  • Any value in the module globals.
  • Any builtin value.
  • undefined variables are not defined, which is ok as long as they are not accessed (or they are accessed in a try/except block that handle the NameError exception).

Static targets, deps, side targets and side deps are defined as str. Star targets, side targets and side deps are defined as functions taking the star-stems as argument and returning the then fully specified file. Also, in that latter case, the reg_expr attribute is defined as a str ready to be provided to the re module and containing named (if corresponding star-stem is named) groups, one for each star-stem.

The job execution is successful (but see above) if no exception is raised.