f3d7623a13
'vim' has two configuration options ('splitbelow' and 'splitright') that
change the way the 'split' command behaves. When they are set, the
commands that the layout engine generates no longer work as expected.
In order to fix this we can append special keyword 'leftabove' to each
'split' and 'vertical split' subcommand found inside the command string
generated by the layout engine.
This works because whatever comes after 'leftabove' will temporally
ignore settings 'splitbelow' and 'splitright'.
Reported-by: Matthew Klein <mklein994@gmail.com>
Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
624 lines
16 KiB
Plaintext
624 lines
16 KiB
Plaintext
# This script can be run in two different contexts:
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#
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# - From git, when the user invokes the "vimdiff" merge tool. In this context
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# this script expects the following environment variables (among others) to
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# be defined (which is something "git" takes care of):
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#
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# - $BASE
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# - $LOCAL
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# - $REMOTE
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# - $MERGED
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#
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# In this mode, all this script does is to run the next command:
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#
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# vim -f -c ... $LOCAL $BASE $REMOTE $MERGED
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#
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# ...where the "..." string depends on the value of the
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# "mergetool.vimdiff.layout" configuration variable and is used to open vim
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# with a certain layout of buffers, windows and tabs.
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#
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# - From a script inside the unit tests framework folder ("t" folder) by
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# sourcing this script and then manually calling "run_unit_tests", which
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# will run a battery of unit tests to make sure nothing breaks.
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# In this context this script does not expect any particular environment
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# variable to be set.
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################################################################################
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## Internal functions (not meant to be used outside this script)
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################################################################################
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debug_print () {
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# Send message to stderr if global variable GIT_MERGETOOL_VIMDIFF is set
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# to "true"
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if test -n "$GIT_MERGETOOL_VIMDIFF_DEBUG"
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then
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>&2 echo "$@"
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fi
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}
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substring () {
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# Return a substring of $1 containing $3 characters starting at
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# zero-based offset $2.
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#
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# Examples:
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#
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# substring "Hello world" 0 4 --> "Hell"
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# substring "Hello world" 3 4 --> "lo w"
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# substring "Hello world" 3 10 --> "lo world"
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STRING=$1
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START=$2
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LEN=$3
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echo "$STRING" | cut -c$(( START + 1 ))-$(( START + $LEN ))
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}
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gen_cmd_aux () {
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# Auxiliary function used from "gen_cmd()".
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# Read that other function documentation for more details.
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LAYOUT=$1
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CMD=$2 # This is a second (hidden) argument used for recursion
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debug_print
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debug_print "LAYOUT : $LAYOUT"
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debug_print "CMD : $CMD"
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if test -z "$CMD"
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then
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CMD="echo" # vim "nop" operator
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fi
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start=0
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end=${#LAYOUT}
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nested=0
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nested_min=100
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# Step 1:
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#
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# Increase/decrease "start"/"end" indices respectively to get rid of
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# outer parenthesis.
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#
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# Example:
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#
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# - BEFORE: (( LOCAL , BASE ) / MERGED )
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# - AFTER : ( LOCAL , BASE ) / MERGED
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oldIFS=$IFS
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IFS=#
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for c in $(echo "$LAYOUT" | sed 's:.:&#:g')
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do
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if test "$c" = " "
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then
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continue
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fi
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if test "$c" = "("
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then
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nested=$(( nested + 1 ))
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continue
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fi
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if test "$c" = ")"
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then
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nested=$(( nested - 1 ))
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continue
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fi
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if test "$nested" -lt "$nested_min"
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then
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nested_min=$nested
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fi
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done
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IFS=$oldIFS
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debug_print "NESTED MIN: $nested_min"
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while test "$nested_min" -gt "0"
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do
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start=$(( start + 1 ))
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end=$(( end - 1 ))
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start_minus_one=$(( start - 1 ))
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while ! test "$(substring "$LAYOUT" "$start_minus_one" 1)" = "("
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do
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start=$(( start + 1 ))
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start_minus_one=$(( start_minus_one + 1 ))
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done
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while ! test "$(substring "$LAYOUT" "$end" 1)" = ")"
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do
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end=$(( end - 1 ))
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done
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nested_min=$(( nested_min - 1 ))
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done
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debug_print "CLEAN : $(substring "$LAYOUT" "$start" "$(( end - start ))")"
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# Step 2:
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#
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# Search for all valid separators ("+", "/" or ",") which are *not*
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# inside parenthesis. Save the index at which each of them makes the
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# first appearance.
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index_new_tab=""
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index_horizontal_split=""
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index_vertical_split=""
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nested=0
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i=$(( start - 1 ))
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oldIFS=$IFS
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IFS=#
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for c in $(substring "$LAYOUT" "$start" "$(( end - start ))" | sed 's:.:&#:g');
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do
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i=$(( i + 1 ))
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if test "$c" = " "
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then
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continue
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fi
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if test "$c" = "("
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then
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nested=$(( nested + 1 ))
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continue
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fi
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if test "$c" = ")"
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then
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nested=$(( nested - 1 ))
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continue
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fi
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if test "$nested" = 0
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then
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current=$c
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if test "$current" = "+"
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then
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if test -z "$index_new_tab"
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then
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index_new_tab=$i
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fi
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elif test "$current" = "/"
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then
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if test -z "$index_horizontal_split"
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then
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index_horizontal_split=$i
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fi
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elif test "$current" = ","
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then
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if test -z "$index_vertical_split"
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then
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index_vertical_split=$i
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fi
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fi
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fi
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done
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IFS=$oldIFS
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# Step 3:
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#
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# Process the separator with the highest order of precedence
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# (";" has the highest precedence and "|" the lowest one).
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#
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# By "process" I mean recursively call this function twice: the first
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# one with the substring at the left of the separator and the second one
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# with the one at its right.
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terminate="false"
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if ! test -z "$index_new_tab"
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then
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before="-tabnew"
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after="tabnext"
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index=$index_new_tab
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terminate="true"
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elif ! test -z "$index_horizontal_split"
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then
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before="leftabove split"
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after="wincmd j"
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index=$index_horizontal_split
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terminate="true"
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elif ! test -z "$index_vertical_split"
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then
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before="leftabove vertical split"
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after="wincmd l"
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index=$index_vertical_split
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terminate="true"
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fi
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if test "$terminate" = "true"
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then
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CMD="$CMD | $before"
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CMD=$(gen_cmd_aux "$(substring "$LAYOUT" "$start" "$(( index - start ))")" "$CMD")
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CMD="$CMD | $after"
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CMD=$(gen_cmd_aux "$(substring "$LAYOUT" "$(( index + 1 ))" "$(( ${#LAYOUT} - index ))")" "$CMD")
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echo "$CMD"
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return
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fi
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# Step 4:
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#
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# If we reach this point, it means there are no separators and we just
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# need to print the command to display the specified buffer
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target=$(substring "$LAYOUT" "$start" "$(( end - start ))" | sed 's:[ @();|-]::g')
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if test "$target" = "LOCAL"
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then
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CMD="$CMD | 1b"
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elif test "$target" = "BASE"
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then
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CMD="$CMD | 2b"
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elif test "$target" = "REMOTE"
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then
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CMD="$CMD | 3b"
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elif test "$target" = "MERGED"
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then
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CMD="$CMD | 4b"
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else
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CMD="$CMD | ERROR: >$target<"
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fi
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echo "$CMD"
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return
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}
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gen_cmd () {
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# This function returns (in global variable FINAL_CMD) the string that
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# you can use when invoking "vim" (as shown next) to obtain a given
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# layout:
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#
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# $ vim -f $FINAL_CMD "$LOCAL" "$BASE" "$REMOTE" "$MERGED"
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#
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# It takes one single argument: a string containing the desired layout
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# definition.
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#
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# The syntax of the "layout definitions" is explained in "Documentation/
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# mergetools/vimdiff.txt" but you can already intuitively understand how
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# it works by knowing that...
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#
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# * "+" means "a new vim tab"
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# * "/" means "a new vim horizontal split"
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# * "," means "a new vim vertical split"
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#
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# It also returns (in global variable FINAL_TARGET) the name ("LOCAL",
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# "BASE", "REMOTE" or "MERGED") of the file that is marked with an "@",
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# or "MERGED" if none of them is.
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#
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# Example:
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#
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# gen_cmd "@LOCAL , REMOTE"
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# |
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# `-> FINAL_CMD == "-c \"echo | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
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# FINAL_TARGET == "LOCAL"
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LAYOUT=$1
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# Search for a "@" in one of the files identifiers ("LOCAL", "BASE",
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# "REMOTE", "MERGED"). If not found, use "MERGE" as the default file
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# where changes will be saved.
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if echo "$LAYOUT" | grep @LOCAL >/dev/null
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then
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FINAL_TARGET="LOCAL"
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elif echo "$LAYOUT" | grep @BASE >/dev/null
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then
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FINAL_TARGET="BASE"
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else
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FINAL_TARGET="MERGED"
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fi
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# Obtain the first part of vim "-c" option to obtain the desired layout
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CMD=$(gen_cmd_aux "$LAYOUT")
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# Adjust the just obtained script depending on whether more than one
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# windows are visible or not
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if echo "$LAYOUT" | grep ",\|/" >/dev/null
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then
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CMD="$CMD | tabdo windo diffthis"
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else
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CMD="$CMD | bufdo diffthis"
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fi
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# Add an extra "-c" option to move to the first tab (notice that we
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# can't simply append the command to the previous "-c" string as
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# explained here: https://github.com/vim/vim/issues/9076
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FINAL_CMD="-c \"$CMD\" -c \"tabfirst\""
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}
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################################################################################
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## API functions (called from "git-mergetool--lib.sh")
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################################################################################
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diff_cmd () {
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"$merge_tool_path" -R -f -d \
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-c 'wincmd l' -c 'cd $GIT_PREFIX' "$LOCAL" "$REMOTE"
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}
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diff_cmd_help () {
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TOOL=$1
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case "$TOOL" in
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nvimdiff*)
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printf "Use Neovim"
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;;
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gvimdiff*)
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printf "Use gVim (requires a graphical session)"
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;;
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vimdiff*)
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printf "Use Vim"
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;;
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esac
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return 0
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}
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merge_cmd () {
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layout=$(git config mergetool.vimdiff.layout)
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case "$1" in
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*vimdiff)
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if test -z "$layout"
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then
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# Default layout when none is specified
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layout="(LOCAL,BASE,REMOTE)/MERGED"
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fi
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;;
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*vimdiff1)
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layout="@LOCAL,REMOTE"
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;;
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*vimdiff2)
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layout="LOCAL,MERGED,REMOTE"
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;;
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*vimdiff3)
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layout="MERGED"
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;;
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esac
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gen_cmd "$layout"
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debug_print ""
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debug_print "FINAL CMD : $FINAL_CMD"
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debug_print "FINAL TAR : $FINAL_TARGET"
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if $base_present
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then
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eval "$merge_tool_path" \
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-f "$FINAL_CMD" "$LOCAL" "$BASE" "$REMOTE" "$MERGED"
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else
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# If there is no BASE (example: a merge conflict in a new file
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# with the same name created in both braches which didn't exist
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# before), close all BASE windows using vim's "quit" command
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FINAL_CMD=$(echo "$FINAL_CMD" | \
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sed -e 's:2b:quit:g' -e 's:3b:2b:g' -e 's:4b:3b:g')
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eval "$merge_tool_path" \
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-f "$FINAL_CMD" "$LOCAL" "$REMOTE" "$MERGED"
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fi
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ret="$?"
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if test "$ret" -eq 0
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then
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case "$FINAL_TARGET" in
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LOCAL)
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source_path="$LOCAL"
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;;
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REMOTE)
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source_path="$REMOTE"
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;;
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MERGED|*)
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# Do nothing
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source_path=
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;;
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esac
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if test -n "$source_path"
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then
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cp "$source_path" "$MERGED"
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fi
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fi
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return "$ret"
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}
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merge_cmd_help () {
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TOOL=$1
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case "$TOOL" in
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nvimdiff*)
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printf "Use Neovim "
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;;
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gvimdiff*)
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printf "Use gVim (requires a graphical session) "
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;;
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vimdiff*)
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printf "Use Vim "
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;;
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esac
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case "$TOOL" in
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*1)
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echo "with a 2 panes layout (LOCAL and REMOTE)"
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;;
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*2)
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echo "with a 3 panes layout (LOCAL, MERGED and REMOTE)"
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;;
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*3)
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echo "where only the MERGED file is shown"
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;;
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*)
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echo "with a custom layout (see \`git help mergetool\`'s \`BACKEND SPECIFIC HINTS\` section)"
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;;
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esac
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return 0
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}
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translate_merge_tool_path () {
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case "$1" in
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nvimdiff*)
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echo nvim
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;;
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gvimdiff*)
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echo gvim
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;;
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vimdiff*)
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echo vim
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;;
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esac
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}
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exit_code_trustable () {
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true
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}
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list_tool_variants () {
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if test "$TOOL_MODE" = "diff"
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then
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for prefix in '' g n
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do
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echo "${prefix}vimdiff"
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done
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else
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for prefix in '' g n
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do
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for suffix in '' 1 2 3
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do
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echo "${prefix}vimdiff${suffix}"
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done
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done
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fi
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}
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################################################################################
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## Unit tests (called from scripts inside the "t" folder)
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################################################################################
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run_unit_tests () {
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# Function to make sure that we don't break anything when modifying this
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# script.
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NUMBER_OF_TEST_CASES=16
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TEST_CASE_01="(LOCAL,BASE,REMOTE)/MERGED" # default behaviour
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TEST_CASE_02="@LOCAL,REMOTE" # when using vimdiff1
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TEST_CASE_03="LOCAL,MERGED,REMOTE" # when using vimdiff2
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TEST_CASE_04="MERGED" # when using vimdiff3
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TEST_CASE_05="LOCAL/MERGED/REMOTE"
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TEST_CASE_06="(LOCAL/REMOTE),MERGED"
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TEST_CASE_07="MERGED,(LOCAL/REMOTE)"
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TEST_CASE_08="(LOCAL,REMOTE)/MERGED"
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TEST_CASE_09="MERGED/(LOCAL,REMOTE)"
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TEST_CASE_10="(LOCAL/BASE/REMOTE),MERGED"
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TEST_CASE_11="(LOCAL,BASE,REMOTE)/MERGED+BASE,LOCAL+BASE,REMOTE+(LOCAL/BASE/REMOTE),MERGED"
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TEST_CASE_12="((LOCAL,REMOTE)/BASE),MERGED"
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TEST_CASE_13="((LOCAL,REMOTE)/BASE),((LOCAL/REMOTE),MERGED)"
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TEST_CASE_14="BASE,REMOTE+BASE,LOCAL"
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TEST_CASE_15=" (( (LOCAL , BASE , REMOTE) / MERGED)) +(BASE) , LOCAL+ BASE , REMOTE+ (((LOCAL / BASE / REMOTE)) , MERGED ) "
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TEST_CASE_16="LOCAL,BASE,REMOTE / MERGED + BASE,LOCAL + BASE,REMOTE + (LOCAL / BASE / REMOTE),MERGED"
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EXPECTED_CMD_01="-c \"echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_02="-c \"echo | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_03="-c \"echo | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 4b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_04="-c \"echo | 4b | bufdo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_05="-c \"echo | leftabove split | 1b | wincmd j | leftabove split | 4b | wincmd j | 3b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_06="-c \"echo | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_07="-c \"echo | leftabove vertical split | 4b | wincmd l | leftabove split | 1b | wincmd j | 3b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_08="-c \"echo | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_09="-c \"echo | leftabove split | 4b | wincmd j | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_10="-c \"echo | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_11="-c \"echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_12="-c \"echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_13="-c \"echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_14="-c \"echo | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | 2b | wincmd l | 1b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_15="-c \"echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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EXPECTED_CMD_16="-c \"echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
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|
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EXPECTED_TARGET_01="MERGED"
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EXPECTED_TARGET_02="LOCAL"
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EXPECTED_TARGET_03="MERGED"
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|
EXPECTED_TARGET_04="MERGED"
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|
EXPECTED_TARGET_05="MERGED"
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|
EXPECTED_TARGET_06="MERGED"
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|
EXPECTED_TARGET_07="MERGED"
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|
EXPECTED_TARGET_08="MERGED"
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|
EXPECTED_TARGET_09="MERGED"
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|
EXPECTED_TARGET_10="MERGED"
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|
EXPECTED_TARGET_11="MERGED"
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|
EXPECTED_TARGET_12="MERGED"
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|
EXPECTED_TARGET_13="MERGED"
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|
EXPECTED_TARGET_14="MERGED"
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|
EXPECTED_TARGET_15="MERGED"
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|
EXPECTED_TARGET_16="MERGED"
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|
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at_least_one_ko="false"
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|
|
|
for i in $(seq -w 1 99)
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|
do
|
|
if test "$i" -gt $NUMBER_OF_TEST_CASES
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|
then
|
|
break
|
|
fi
|
|
|
|
gen_cmd "$(eval echo \${TEST_CASE_"$i"})"
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|
|
|
if test "$FINAL_CMD" = "$(eval echo \${EXPECTED_CMD_"$i"})" \
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|
&& test "$FINAL_TARGET" = "$(eval echo \${EXPECTED_TARGET_"$i"})"
|
|
then
|
|
printf "Test Case #%02d: OK\n" "$(echo "$i" | sed 's/^0*//')"
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|
else
|
|
printf "Test Case #%02d: KO !!!!\n" "$(echo "$i" | sed 's/^0*//')"
|
|
echo " FINAL_CMD : $FINAL_CMD"
|
|
echo " FINAL_CMD (expected) : $(eval echo \${EXPECTED_CMD_"$i"})"
|
|
echo " FINAL_TARGET : $FINAL_TARGET"
|
|
echo " FINAL_TARGET (expected): $(eval echo \${EXPECTED_TARGET_"$i"})"
|
|
at_least_one_ko="true"
|
|
fi
|
|
done
|
|
|
|
if test "$at_least_one_ko" = "true"
|
|
then
|
|
return 255
|
|
else
|
|
return 0
|
|
fi
|
|
}
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