Documentation/git.txt: improve documentation of 'GIT_TRACE*' variables

Separate GIT_TRACE description into what it prints and how to configure where trace output is printed to. Change other GIT_TRACE_* descriptions to refer to GIT_TRACE. Add descriptions for GIT_TRACE_SETUP and GIT_TRACE_SHALLOW. Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Karsten Blees committed Jul 12, 2014 at 02:00 UTC eb9250dfd5fbd7c9f95d0d3134006cd19a0c9099
1 file changed +34 -16
Documentation/git.txt
+34 -16
@@ -904,18 +904,25 @@ for further details.
904 based on whether stdout appears to be redirected to a file or not.
905
906 'GIT_TRACE'::
907 - If this variable is set to "1", "2" or "true" (comparison
908 - is case insensitive), Git will print `trace:` messages on
909 - stderr telling about alias expansion, built-in command
910 - execution and external command execution.
911 - If this variable is set to an integer value greater than 1
912 - and lower than 10 (strictly) then Git will interpret this
913 - value as an open file descriptor and will try to write the
914 - trace messages into this file descriptor.
915 - Alternatively, if this variable is set to an absolute path
916 - (starting with a '/' character), Git will interpret this
917 - as a file path and will try to write the trace messages
918 - into it.
907 + Enables general trace messages, e.g. alias expansion, built-in
908 + command execution and external command execution.
909 ++
910 +If this variable is set to "1", "2" or "true" (comparison
911 +is case insensitive), trace messages will be printed to
912 +stderr.
913 ++
914 +If the variable is set to an integer value greater than 2
915 +and lower than 10 (strictly) then Git will interpret this
916 +value as an open file descriptor and will try to write the
917 +trace messages into this file descriptor.
918 ++
919 +Alternatively, if the variable is set to an absolute path
920 +(starting with a '/' character), Git will interpret this
921 +as a file path and will try to write the trace messages
922 +into it.
923 ++
924 +Unsetting the variable, or setting it to empty, "0" or
925 +"false" (case insensitive) disables trace messages.
926
927 'GIT_TRACE_PACK_ACCESS'::
928 If this variable is set to a path, a file will be created at
@@ -925,10 +932,21 @@ for further details.
932 pack-related performance problems.
933
934 'GIT_TRACE_PACKET'::
928 - If this variable is set, it shows a trace of all packets
929 - coming in or out of a given program. This can help with
930 - debugging object negotiation or other protocol issues. Tracing
931 - is turned off at a packet starting with "PACK".
935 + Enables trace messages for all packets coming in or out of a
936 + given program. This can help with debugging object negotiation
937 + or other protocol issues. Tracing is turned off at a packet
938 + starting with "PACK".
939 + See 'GIT_TRACE' for available trace output options.
940 +
941 +'GIT_TRACE_SETUP'::
942 + Enables trace messages printing the .git, working tree and current
943 + working directory after Git has completed its setup phase.
944 + See 'GIT_TRACE' for available trace output options.
945 +
946 +'GIT_TRACE_SHALLOW'::
947 + Enables trace messages that can help debugging fetching /
948 + cloning of shallow repositories.
949 + See 'GIT_TRACE' for available trace output options.
950
951 GIT_LITERAL_PATHSPECS::
952 Setting this variable to `1` will cause Git to treat all