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mingw: document the standard handle redirection

This feature has been in Git for Windows since v2.11.0(2), as an
experimental option. Now it is considered mature, and it is high time to
document it properly.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Johannes Schindelin 7 years ago committed by Junio C Hamano
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commit
b2f55717c7
  1. 18
      Documentation/git.txt

18
Documentation/git.txt

@ -709,6 +709,24 @@ of clones and fetches. @@ -709,6 +709,24 @@ of clones and fetches.
the background which do not want to cause lock contention with
other operations on the repository. Defaults to `1`.

`GIT_REDIRECT_STDIN`::
`GIT_REDIRECT_STDOUT`::
`GIT_REDIRECT_STDERR`::
Windows-only: allow redirecting the standard input/output/error
handles to paths specified by the environment variables. This is
particularly useful in multi-threaded applications where the
canonical way to pass standard handles via `CreateProcess()` is
not an option because it would require the handles to be marked
inheritable (and consequently *every* spawned process would
inherit them, possibly blocking regular Git operations). The
primary intended use case is to use named pipes for communication
(e.g. `\\.\pipe\my-git-stdin-123`).
+
Two special values are supported: `off` will simply close the
corresponding standard handle, and if `GIT_REDIRECT_STDERR` is
`2>&1`, standard error will be redirected to the same handle as
standard output.

Discussion[[Discussion]]
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