646 lines
17 KiB
Plaintext
646 lines
17 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 $MERGED
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#
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# ...where the "..." string depends on the value of the
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# "mergetool.vimdiff.layout" configuration variable and is used to open vim
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# with a certain layout of buffers, windows and tabs.
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#
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# - From a script inside the unit tests framework folder ("t" folder) by
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# sourcing this script and then manually calling "run_unit_tests", which
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# will run a battery of unit tests to make sure nothing breaks.
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# In this context this script does not expect any particular environment
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# variable to be set.
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################################################################################
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## Internal functions (not meant to be used outside this script)
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################################################################################
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debug_print () {
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# Send message to stderr if global variable GIT_MERGETOOL_VIMDIFF_DEBUG
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# is set.
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if test -n "$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 : $CMD"
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start=0
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end=${#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 -z "$c" || test "$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_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_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_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 "$LAYOUT" | grep @BASE >/dev/null
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then
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FINAL_TARGET="BASE"
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else
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FINAL_TARGET="MERGED"
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fi
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# Obtain the first part of vim "-c" option to obtain the desired layout
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CMD=
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oldIFS=$IFS
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IFS=+
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for tab in $LAYOUT
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do
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if test -z "$CMD"
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then
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CMD="echo" # vim "nop" operator
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else
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CMD="$CMD | tabnew"
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fi
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# If this is a single window diff with all the buffers
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if ! echo "$tab" | grep -E ",|/" >/dev/null
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then
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CMD="$CMD | silent execute 'bufdo diffthis'"
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fi
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CMD=$(gen_cmd_aux "$tab" "$CMD")
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done
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IFS=$oldIFS
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CMD="$CMD | execute 'tabdo windo diffthis'"
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FINAL_CMD="-c \"set hidden diffopt-=hiddenoff | $CMD | tabfirst\""
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}
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################################################################################
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## API functions (called from "git-mergetool--lib.sh")
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################################################################################
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diff_cmd () {
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"$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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TOOL=$1
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layout=$(git config "mergetool.$TOOL.layout")
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# backward compatibility:
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if test -z "$layout"
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then
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layout=$(git config mergetool.vimdiff.layout)
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fi
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case "$TOOL" 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"' '"$MERGED"'
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else
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# If there is no BASE (example: a merge conflict in a new file
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# with the same name created in both branches which didn't exist
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# before), close all BASE windows using vim's "quit" command
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FINAL_CMD=$(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 \"set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_02="-c \"set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 1b | wincmd l | 3b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_03="-c \"set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 4b | wincmd l | 3b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_04="-c \"set hidden diffopt-=hiddenoff | echo | silent execute 'bufdo diffthis' | 4b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_05="-c \"set hidden diffopt-=hiddenoff | echo | leftabove split | 1b | wincmd j | leftabove split | 4b | wincmd j | 3b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_06="-c \"set hidden diffopt-=hiddenoff | echo | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_07="-c \"set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 4b | wincmd l | leftabove split | 1b | wincmd j | 3b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_08="-c \"set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 4b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_09="-c \"set hidden diffopt-=hiddenoff | echo | leftabove split | 4b | wincmd j | leftabove vertical split | 1b | wincmd l | 3b | execute 'tabdo windo diffthis' | tabfirst\""
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EXPECTED_CMD_10="-c \"set hidden diffopt-=hiddenoff | echo | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\""
|
|
EXPECTED_CMD_11="-c \"set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\""
|
|
EXPECTED_CMD_12="-c \"set hidden diffopt-=hiddenoff | echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\""
|
|
EXPECTED_CMD_13="-c \"set hidden diffopt-=hiddenoff | 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 | execute 'tabdo windo diffthis' | tabfirst\""
|
|
EXPECTED_CMD_14="-c \"set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | execute 'tabdo windo diffthis' | tabfirst\""
|
|
EXPECTED_CMD_15="-c \"set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\""
|
|
EXPECTED_CMD_16="-c \"set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\""
|
|
|
|
EXPECTED_TARGET_01="MERGED"
|
|
EXPECTED_TARGET_02="LOCAL"
|
|
EXPECTED_TARGET_03="MERGED"
|
|
EXPECTED_TARGET_04="MERGED"
|
|
EXPECTED_TARGET_05="MERGED"
|
|
EXPECTED_TARGET_06="MERGED"
|
|
EXPECTED_TARGET_07="MERGED"
|
|
EXPECTED_TARGET_08="MERGED"
|
|
EXPECTED_TARGET_09="MERGED"
|
|
EXPECTED_TARGET_10="MERGED"
|
|
EXPECTED_TARGET_11="MERGED"
|
|
EXPECTED_TARGET_12="MERGED"
|
|
EXPECTED_TARGET_13="MERGED"
|
|
EXPECTED_TARGET_14="MERGED"
|
|
EXPECTED_TARGET_15="MERGED"
|
|
EXPECTED_TARGET_16="MERGED"
|
|
|
|
at_least_one_ko="false"
|
|
|
|
for i in $(seq -w 1 99)
|
|
do
|
|
if test "$i" -gt $NUMBER_OF_TEST_CASES
|
|
then
|
|
break
|
|
fi
|
|
|
|
gen_cmd "$(eval echo \${TEST_CASE_"$i"})"
|
|
|
|
if test "$FINAL_CMD" = "$(eval echo \${EXPECTED_CMD_"$i"})" \
|
|
&& test "$FINAL_TARGET" = "$(eval echo \${EXPECTED_TARGET_"$i"})"
|
|
then
|
|
printf "Test Case #%02d: OK\n" "$(echo "$i" | sed 's/^0*//')"
|
|
else
|
|
printf "Test Case #%02d: KO !!!!\n" "$(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
|
|
|
|
# verify that `merge_cmd` handles paths with spaces
|
|
record_parameters () {
|
|
>actual
|
|
for arg
|
|
do
|
|
echo "$arg" >>actual
|
|
done
|
|
}
|
|
|
|
base_present=false
|
|
LOCAL='lo cal'
|
|
BASE='ba se'
|
|
REMOTE="' '"
|
|
MERGED='mer ged'
|
|
merge_tool_path=record_parameters
|
|
|
|
merge_cmd vimdiff || at_least_one_ko=true
|
|
|
|
cat >expect <<-\EOF
|
|
-f
|
|
-c
|
|
set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | quit | wincmd l | 2b | wincmd j | 3b | execute 'tabdo windo diffthis' | tabfirst
|
|
lo cal
|
|
' '
|
|
mer ged
|
|
EOF
|
|
|
|
diff -u expect actual || at_least_one_ko=true
|
|
|
|
if test "$at_least_one_ko" = "true"
|
|
then
|
|
return 255
|
|
else
|
|
return 0
|
|
fi
|
|
}
|