annotate hgmerge @ 830:ca080d28d0af

If rejects are empty after using the editor, merge with diff+patch was ok.
author Thomas Arendsen Hein <thomas@intevation.de>
date Thu, 04 Aug 2005 17:23:31 +0100
parents 764b0350acb8
children 232d0616a80a
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1 #!/bin/sh
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2 #
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3 # hgmerge - default merge helper for Mercurial
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4 #
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5 # This tries to find a way to do three-way merge on the current system.
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6 # The result ought to end up in $1.
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7
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8 set -e # bail out quickly on failure
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9
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10 LOCAL="$1"
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11 BASE="$2"
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12 OTHER="$3"
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13
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14 if [ -z "$EDITOR" ]; then
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15 EDITOR="vi"
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16 fi
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17
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18 # Back up our file
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19 cp "$LOCAL" "$LOCAL.orig"
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20
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21 # Attempt to do a non-interactive merge
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22 if type merge > /dev/null 2>&1; then
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23 merge "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && exit 0
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24 cp "$LOCAL.orig" "$LOCAL"
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25 elif type diff3 > /dev/null 2>&1; then
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26 diff3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" && exit 0
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27 cp "$LOCAL.orig" "$LOCAL"
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28 fi
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29
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30 if [ -n "$DISPLAY" ]; then
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31 # try using kdiff3, which is fairly nice
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32 if type kdiff3 > /dev/null 2>&1; then
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33 kdiff3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || exit 1
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34 exit 0
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35 fi
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36
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37 # try using tkdiff, which is a bit less sophisticated
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38 if type tkdiff > /dev/null 2>&1; then
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39 tkdiff "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || exit 1
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40 exit 0
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41 fi
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42 fi
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43
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44 # Attempt to do a merge with $EDITOR
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45 if type merge > /dev/null 2>&1; then
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46 echo "conflicts detected in $LOCAL"
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47 merge "$LOCAL" "$BASE" "$OTHER" 2>/dev/null || $EDITOR "$LOCAL"
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48 exit 0
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49 fi
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50
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51 if type diff3 > /dev/null 2>&1; then
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52 echo "conflicts detected in $LOCAL"
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53 diff3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" || $EDITOR "$LOCAL"
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54 exit 0
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55 fi
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56
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57 HGTMP=""
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58 cleanup_exit() {
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59 rm -rf "$HGTMP"
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60 exit $1
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61 }
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62
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63 # attempt to manually merge with diff and patch
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64 if type diff > /dev/null 2>&1 && type patch > /dev/null 2>&1; then
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65 # Remove temporary files even if we get interrupted
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66 trap "cleanup_exit 1" TERM KILL INT QUIT ABRT
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67
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68 HGTMP="${TMPDIR-/tmp}/hgmerge.$RANDOM.$RANDOM.$RANDOM.$$"
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69 (umask 077 && mkdir "$HGTMP") || {
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70 echo "Could not create temporary directory! Exiting." 1>&2
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71 exit 1
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72 }
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73
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74 diff -u "$BASE" "$OTHER" > "$HGTMP/diff"
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75 if patch "$LOCAL" < "$HGTMP/diff"; then
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76 cleanup_exit 0
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77 else
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78 # If rejects are empty after using the editor, merge was ok
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79 $EDITOR "$LOCAL" "$LOCAL.rej" && test -s "$LOCAL.rej" || cleanup_exit 0
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80 fi
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81 cleanup_exit 1
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82 fi
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83
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84 echo "hgmerge: unable to find merge, tkdiff, kdiff3, or diff+patch!"
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85 exit 1