Andrew's git / gitweb.git / git-am.sh
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git-am.shon commit git-am: make it easier after fixing up an unapplicable patch. (271440e)
   1#!/bin/sh
   2#
   3#
   4. git-sh-setup || die "Not a git archive"
   5
   6files=$(git-diff-index --cached --name-only HEAD) || exit
   7if [ "$files" ]; then
   8   echo "Dirty index: cannot apply patches (dirty: $files)" >&2
   9   exit 1
  10fi
  11
  12usage () {
  13    echo >&2 "usage: $0 [--signoff] [--dotest=<dir>] [--utf8] [--3way] <mbox>"
  14    echo >&2 "  or, when resuming"
  15    echo >&2 "  $0 [--skip]"
  16    exit 1;
  17}
  18
  19stop_here () {
  20    echo "$1" >"$dotest/next"
  21    exit 1
  22}
  23
  24go_next () {
  25        rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  26                "$dotest/patch" "$dotest/info"
  27        echo "$next" >"$dotest/next"
  28        this=$next
  29}
  30
  31fall_back_3way () {
  32    O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  33
  34    rm -fr "$dotest"/patch-merge-*
  35    mkdir "$dotest/patch-merge-tmp-dir"
  36
  37    # First see if the patch records the index info that we can use.
  38    if git-apply -z --index-info "$dotest/patch" \
  39        >"$dotest/patch-merge-index-info" 2>/dev/null &&
  40        GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  41        git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
  42        GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  43        git-write-tree >"$dotest/patch-merge-base+" &&
  44        # index has the base tree now.
  45        (
  46            cd "$dotest/patch-merge-tmp-dir" &&
  47            GIT_INDEX_FILE="../patch-merge-tmp-index" \
  48            GIT_OBJECT_DIRECTORY="$O_OBJECT" \
  49            git-apply --index <../patch
  50        )
  51    then
  52        echo Using index info to reconstruct a base tree...
  53        mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  54        mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  55    else
  56        # Otherwise, try nearby trees that can be used to apply the
  57        # patch.
  58        (
  59            N=10
  60
  61            # Hoping the patch is against our recent commits...
  62            git-rev-list --max-count=$N HEAD
  63
  64            # or hoping the patch is against known tags...
  65            git-ls-remote --tags .
  66        ) |
  67        while read base junk
  68        do
  69            # See if we have it as a tree...
  70            git-cat-file tree "$base" >/dev/null 2>&1 || continue
  71
  72            rm -fr "$dotest"/patch-merge-* &&
  73            mkdir "$dotest/patch-merge-tmp-dir" || break
  74            (
  75                cd "$dotest/patch-merge-tmp-dir" &&
  76                GIT_INDEX_FILE=../patch-merge-tmp-index &&
  77                GIT_OBJECT_DIRECTORY="$O_OBJECT" &&
  78                export GIT_INDEX_FILE GIT_OBJECT_DIRECTORY &&
  79                git-read-tree "$base" &&
  80                git-apply --index &&
  81                mv ../patch-merge-tmp-index ../patch-merge-index &&
  82                echo "$base" >../patch-merge-base
  83            ) <"$dotest/patch"  2>/dev/null && break
  84        done
  85    fi
  86
  87    test -f "$dotest/patch-merge-index" &&
  88    his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git-write-tree) &&
  89    orig_tree=$(cat "$dotest/patch-merge-base") &&
  90    rm -fr "$dotest"/patch-merge-* || exit 1
  91
  92    echo Falling back to patching base and 3-way merge...
  93
  94    # This is not so wrong.  Depending on which base we picked,
  95    # orig_tree may be wildly different from ours, but his_tree
  96    # has the same set of wildly different changes in parts the
  97    # patch did not touch, so resolve ends up cancelling them,
  98    # saying that we reverted all those changes.
  99
 100    git-merge-resolve $orig_tree -- HEAD $his_tree || {
 101            echo Failed to merge in the changes.
 102            exit 1
 103    }
 104}
 105
 106prec=4
 107dotest=.dotest sign= utf8= keep= skip= interactive=
 108
 109while case "$#" in 0) break;; esac
 110do
 111        case "$1" in
 112        -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 113        dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
 114        -d|--d|--do|--dot|--dote|--dotes|--dotest)
 115        case "$#" in 1) usage ;; esac; shift
 116        dotest="$1"; shift;;
 117
 118        -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 119        --interacti|--interactiv|--interactive)
 120        interactive=t; shift ;;
 121
 122        -3|--3|--3w|--3wa|--3way)
 123        threeway=t; shift ;;
 124        -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 125        sign=t; shift ;;
 126        -u|--u|--ut|--utf|--utf8)
 127        utf8=t; shift ;;
 128        -k|--k|--ke|--kee|--keep)
 129        keep=t; shift ;;
 130
 131        --sk|--ski|--skip)
 132        skip=t; shift ;;
 133
 134        --)
 135        shift; break ;;
 136        -*)
 137        usage ;;
 138        *)
 139        break ;;
 140        esac
 141done
 142
 143if test -d "$dotest" &&
 144   last=$(cat "$dotest/last") &&
 145   next=$(cat "$dotest/next") &&
 146   test $# != 0 &&
 147   test "$next" -gt "$last"
 148then
 149   rm -fr "$dotest"
 150fi
 151
 152if test -d "$dotest"
 153then
 154        test ",$#," = ",0," ||
 155        die "previous dotest directory $dotest still exists but mbox given."
 156        resume=yes
 157else
 158        # Make sure we are not given --skip
 159        test ",$skip," = ,, ||
 160        die "we are not resuming."
 161
 162        # Start afresh.
 163        mkdir -p "$dotest" || exit
 164
 165        # cat does the right thing for us, including '-' to mean
 166        # standard input.
 167        cat "$@" |
 168        git-mailsplit -d$prec "$dotest/" >"$dotest/last" || {
 169                rm -fr "$dotest"
 170                exit 1
 171        }
 172
 173        echo "$sign" >"$dotest/sign"
 174        echo "$utf8" >"$dotest/utf8"
 175        echo "$keep" >"$dotest/keep"
 176        echo 1 >"$dotest/next"
 177fi
 178
 179if test "$(cat "$dotest/utf8")" = t
 180then
 181        utf8=-u
 182fi
 183if test "$(cat "$dotest/keep")" = t
 184then
 185        keep=-k
 186fi
 187if test "$(cat "$dotest/sign")" = t
 188then
 189        SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 190                        s/>.*/>/
 191                        s/^/Signed-off-by: /'
 192                `
 193else
 194        SIGNOFF=
 195fi
 196
 197last=`cat "$dotest/last"`
 198this=`cat "$dotest/next"`
 199if test "$skip" = t
 200then
 201        this=`expr "$this" + 1`
 202fi
 203
 204if test "$this" -gt "$last"
 205then
 206        echo Nothing to do.
 207        rm -fr "$dotest"
 208        exit
 209fi
 210
 211while test "$this" -le "$last"
 212do
 213        msgnum=`printf "%0${prec}d" $this`
 214        next=`expr "$this" + 1`
 215        test -f "$dotest/$msgnum" || {
 216                go_next
 217                continue
 218        }
 219        case "$resume" in
 220        '')
 221                git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 222                        <"$dotest/$msgnum" >"$dotest/info" ||
 223                        stop_here $this
 224                git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 225                ;;
 226        esac
 227        resume=
 228
 229        GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 230        GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 231        GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 232        SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 233        export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 234
 235        case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 236        if test '' != "$SIGNOFF"
 237        then
 238                LAST_SIGNED_OFF_BY=`
 239                        sed -ne '/^Signed-off-by: /p' "$dotest/msg-clean" |
 240                        tail -n 1
 241                `
 242                ADD_SIGNOFF=$(test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 243                    test '' = "$LAST_SIGNED_OFF_BY" && echo
 244                    echo "$SIGNOFF"
 245                })
 246        else
 247                ADD_SIGNOFF=
 248        fi
 249        {
 250                echo "$SUBJECT"
 251                if test -s "$dotest/msg-clean"
 252                then
 253                        echo
 254                        cat "$dotest/msg-clean"
 255                fi
 256                if test '' != "$ADD_SIGNOFF"
 257                then
 258                        echo "$ADD_SIGNOFF"
 259                fi
 260        } >"$dotest/final-commit"
 261
 262        if test "$interactive" = t
 263        then
 264            test -t 0 ||
 265            die "cannot be interactive without stdin connected to a terminal."
 266            action=again
 267            while test "$action" = again
 268            do
 269                echo "Commit Body is:"
 270                echo "--------------------------"
 271                cat "$dotest/final-commit"
 272                echo "--------------------------"
 273                echo -n "Apply? [y]es/[n]o/[e]dit/[a]ccept all "
 274                read reply
 275                case "$reply" in
 276                y*|Y*) action=yes ;;
 277                a*|A*) action=yes interactive= ;;
 278                n*|N*) action=skip ;;
 279                e*|E*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 280                       action=again ;;
 281                esac
 282            done
 283        else
 284            action=yes
 285        fi
 286
 287        if test $action = skip
 288        then
 289                go_next
 290                continue
 291        fi
 292
 293        if test -x "$GIT_DIR"/hooks/applypatch-msg
 294        then
 295                "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 296                stop_here $this
 297        fi
 298
 299        echo
 300        echo "Applying '$SUBJECT'"
 301        echo
 302
 303        git-apply --index "$dotest/patch"; apply_status=$?
 304        if test $apply_status = 1 && test "$threeway" = t
 305        then
 306                if (fall_back_3way)
 307                then
 308                    # Applying the patch to an earlier tree and merging the
 309                    # result may have produced the same tree as ours.
 310                    changed="$(git-diff-index --cached --name-only -z HEAD)"
 311                    if test '' = "$changed"
 312                    then
 313                            echo No changes -- Patch already applied.
 314                            go_next
 315                            continue
 316                    fi
 317                    # clear apply_status -- we have successfully merged.
 318                    apply_status=0
 319                fi
 320        fi
 321        if test $apply_status != 0
 322        then
 323                echo Patch failed at $msgnum.
 324                stop_here $this
 325        fi
 326
 327        if test -x "$GIT_DIR"/hooks/pre-applypatch
 328        then
 329                "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 330        fi
 331
 332        tree=$(git-write-tree) &&
 333        echo Wrote tree $tree &&
 334        parent=$(git-rev-parse --verify HEAD) &&
 335        commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 336        echo Committed: $commit &&
 337        git-update-ref HEAD $commit $parent ||
 338        stop_here $this
 339
 340        if test -x "$GIT_DIR"/hooks/post-applypatch
 341        then
 342                "$GIT_DIR"/hooks/post-applypatch
 343        fi
 344
 345        go_next
 346done
 347
 348rm -fr "$dotest"