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run-command: add env_array, an optional argv_array for env

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Similar to args, add a struct argv_array member to struct child_process
that simplifies specifying the environment for children.  It is freed
automatically by finish_command() or if start_command() encounters an
error.

Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe
2014-10-19 13:13:55 +02:00
committed by Junio C Hamano
parent 98349e5364
commit 19a583dc39
3 changed files with 13 additions and 1 deletions
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5
Documentation/technical/api-run-command.txt
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@ -169,6 +169,11 @@ string pointers (NULL terminated) in .env:
. If the string does not contain '=', it names an environment
variable that will be removed from the child process's environment.
If the .env member is NULL, `start_command` will point it at the
.env_array `argv_array` (so you may use one or the other, but not both).
The memory in .env_array will be cleaned up automatically during
`finish_command` (or during `start_command` when it is unsuccessful).
To specify a new initial working directory for the sub-process,
specify it in the .dir member.