Mercurial > hg
annotate hgmerge @ 1772:b1a7fd503a29
hgmerge: logic changes
Details:
- keep automatic merge conflicts in $LOCAL
- do not assume that $EDITOR returns proper error code
- fix a slight mistake in diff+patch merge success detection
(it could succeed if the $EDITOR failed to run)
author | Radoslaw Szkodzinski <astralstorm@gorzow.mm.pl> |
---|---|
date | Tue, 21 Feb 2006 15:48:16 -0600 |
parents | e22bbca2e82b |
children | aae93c3bffb4 |
rev | line source |
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544
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Remove bashisms and use /bin/sh instead of /bin/bash.
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1 #!/bin/sh |
240 | 2 # |
3 # hgmerge - default merge helper for Mercurial | |
4 # | |
5 # This tries to find a way to do three-way merge on the current system. | |
6 # The result ought to end up in $1. | |
7 | |
8 set -e # bail out quickly on failure | |
9 | |
795
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10 LOCAL="$1" |
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11 BASE="$2" |
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12 OTHER="$3" |
240 | 13 |
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14 if [ -z "$EDITOR" ]; then |
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15 EDITOR="vi" |
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16 fi |
304
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Use vi if $EDITOR is unset.
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17 |
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18 # find decent versions of our utilities, insisting on the GNU versions where we |
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19 # need to |
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20 MERGE="merge" |
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21 DIFF3="gdiff3" |
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22 DIFF="gdiff" |
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23 PATCH="gpatch" |
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24 |
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25 type "$MERGE" >/dev/null 2>&1 || MERGE= |
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26 type "$DIFF3" >/dev/null 2>&1 || DIFF3="diff3" |
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27 $DIFF3 --version >/dev/null 2>&1 || DIFF3= |
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28 type "$DIFF" >/dev/null 2>&1 || DIFF="diff" |
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29 type "$DIFF" >/dev/null 2>&1 || DIFF= |
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30 type "$PATCH" >/dev/null 2>&1 || PATCH="patch" |
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31 type "$PATCH" >/dev/null 2>&1 || PATCH= |
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32 |
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33 # find optional visual utilities |
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34 FILEMERGE="/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge" |
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35 KDIFF3="kdiff3" |
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36 TKDIFF="tkdiff" |
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37 |
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38 type "$FILEMERGE" >/dev/null 2>&1 || FILEMERGE= |
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39 type "$KDIFF3" >/dev/null 2>&1 || KDIFF3= |
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40 type "$TKDIFF" >/dev/null 2>&1 || TKDIFF= |
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41 |
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42 # random part of names |
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43 RAND="$RANDOM$RANDOM" |
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44 |
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45 # temporary directory for diff+patch merge |
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46 HGTMP="${TMPDIR-'/tmp'}/hgmerge.$RAND" |
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47 |
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48 # backup file |
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49 BACKUP="$LOCAL.orig.$RAND" |
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50 |
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51 # file used to test for file change |
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52 CHGTEST="$LOCAL.chg.$RAND" |
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53 |
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54 # put all your required cleanup here |
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55 cleanup() { |
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56 rm -f "$BACKUP" "$CHGTEST" |
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57 rm -rf "$HGTMP" |
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58 } |
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59 |
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60 # functions concerning program exit |
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61 success() { |
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62 cleanup |
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63 exit 0 |
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64 } |
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65 |
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66 failure() { |
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67 echo "merge failed" 1>&2 |
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68 mv "$BACKUP" "$LOCAL" |
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69 cleanup |
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70 exit 1 |
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71 } |
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72 |
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73 # Ask if the merge was successful |
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74 ask_if_merged() { |
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75 while 1; do |
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76 echo "$LOCAL seems unchanged. Was the merge successful? [y/n]" |
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77 read answer |
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78 case answer in |
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79 y*|Y*) success;; |
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80 n*|N*) failure;; |
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81 esac |
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82 done |
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83 } |
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84 |
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85 # Clean up when interrupted |
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86 trap "failure" 1 2 3 6 15 # HUP INT QUIT ABRT TERM |
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87 |
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88 # Back up our file (and try hard to keep the mtime unchanged) |
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89 mv "$LOCAL" "$BACKUP" |
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90 cp "$BACKUP" "$LOCAL" |
240 | 91 |
92 # Attempt to do a non-interactive merge | |
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93 if [ -n "$MERGE" -o -n "$DIFF3" ]; then |
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94 if [ -n "$MERGE" ]; then |
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95 $MERGE "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && success |
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96 elif [ -n "$DIFF3" ]; then |
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97 $DIFF3 -m "$BACKUP" "$BASE" "$OTHER" > "$LOCAL" && success |
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98 fi |
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99 if [ $? -gt 1 ]; then |
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100 echo "automatic merge failed! Exiting." 1>&2 |
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101 failure |
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102 fi |
240 | 103 fi |
104 | |
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105 # on MacOS X try FileMerge.app, shipped with Apple's developer tools |
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106 if [ -n "$FILEMERGE" ]; then |
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107 cp "$BACKUP" "$LOCAL" |
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108 cp "$BACKUP" "$CHGTEST" |
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109 # filemerge prefers the right by default |
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110 $FILEMERGE -left "$OTHER" -right "$LOCAL" -ancestor "$BASE" -merge "$LOCAL" |
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111 [ $? -ne 0 ] && echo "FileMerge failed to launch" && failure |
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112 test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged |
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113 fi |
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114 |
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115 if [ -n "$DISPLAY" ]; then |
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116 # try using kdiff3, which is fairly nice |
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117 if [ -n "$KDIFF3" ]; then |
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118 $KDIFF3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || failure |
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119 success |
240 | 120 fi |
121 | |
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122 # try using tkdiff, which is a bit less sophisticated |
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123 if [ -n "$TKDIFF" ]; then |
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124 $TKDIFF "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || failure |
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125 success |
240 | 126 fi |
127 fi | |
128 | |
129 # Attempt to do a merge with $EDITOR | |
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130 if [ -n "$MERGE" -o -n "$DIFF3" ]; then |
242 | 131 echo "conflicts detected in $LOCAL" |
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132 cp "$BACKUP" "$CHGTEST" |
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133 $EDITOR "$LOCAL" || failure |
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134 # Some editors do not return meaningful error codes |
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135 # Do not take any chances |
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136 test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged |
240 | 137 fi |
138 | |
139 # attempt to manually merge with diff and patch | |
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140 if [ -n "$DIFF" -a -n "$PATCH" ]; then |
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141 |
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142 (umask 077 && mkdir "$HGTMP") || { |
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143 echo "Could not create temporary directory $HGTMP" 1>&2 |
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144 failure |
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145 } |
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146 |
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147 $DIFF -u "$BASE" "$OTHER" > "$HGTMP/diff" || : |
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148 if $PATCH "$LOCAL" < "$HGTMP/diff"; then |
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149 success |
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150 else |
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151 # If rejects are empty after using the editor, merge was ok |
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152 $EDITOR "$LOCAL" "$LOCAL.rej" || failure |
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153 test -s "$LOCAL.rej" || success |
240 | 154 fi |
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155 failure |
240 | 156 fi |
157 | |
158 echo "hgmerge: unable to find merge, tkdiff, kdiff3, or diff+patch!" | |
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159 failure |