Andrew's git / gitweb.git / git-am.sh
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git-am.shon commit Yank writing-back support from gitfakemmap. (f48000f)
   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 --show-index-info "$dotest/patch" \
  39        >"$dotest/patch-merge-index-info" 2>/dev/null &&
  40        GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  41        git-update-index --index-info <"$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 $dotest still exists but mbox given."
 156else
 157        # Make sure we are not given --skip
 158        test ",$skip," = ,, ||
 159        die "we are not resuming."
 160
 161        # Start afresh.
 162        mkdir -p "$dotest" || exit
 163
 164        # cat does the right thing for us, including '-' to mean
 165        # standard input.
 166        cat "$@" |
 167        git-mailsplit -d$prec "$dotest/" >"$dotest/last" || {
 168                rm -fr "$dotest"
 169                exit 1
 170        }
 171
 172        echo "$sign" >"$dotest/sign"
 173        echo "$utf8" >"$dotest/utf8"
 174        echo "$keep" >"$dotest/keep"
 175        echo "$threeway" >"$dotest/3way"
 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 "$dotest/sign")" = t
 188then
 189        SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 190                        s/>.*/>/
 191                        s/^/Signed-off-by: /'
 192                `
 193else
 194        SIGNOFF=
 195fi
 196threeway=$(cat "$dotest/3way")
 197
 198last=`cat "$dotest/last"`
 199this=`cat "$dotest/next"`
 200if test "$skip" = t
 201then
 202        this=`expr "$this" + 1`
 203fi
 204
 205if test "$this" -gt "$last"
 206then
 207        echo Nothing to do.
 208        rm -fr "$dotest"
 209        exit
 210fi
 211
 212while test "$this" -le "$last"
 213do
 214        msgnum=`printf "%0${prec}d" $this`
 215        next=`expr "$this" + 1`
 216        test -f "$dotest/$msgnum" || {
 217                go_next
 218                continue
 219        }
 220        git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 221                <"$dotest/$msgnum" >"$dotest/info" ||
 222                stop_here $this
 223        git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 224
 225        GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 226        GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 227        GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 228        SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 229
 230        case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 231        if test '' != "$SIGNOFF"
 232        then
 233                LAST_SIGNED_OFF_BY=`
 234                        sed -ne '/^Signed-off-by: /p' "$dotest/msg-clean" |
 235                        tail -n 1
 236                `
 237                ADD_SIGNOFF=$(test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 238                    test '' = "$LAST_SIGNED_OFF_BY" && echo
 239                    echo "$SIGNOFF"
 240                })
 241        else
 242                ADD_SIGNOFF=
 243        fi
 244        {
 245                echo "$SUBJECT"
 246                if test -s "$dotest/msg-clean"
 247                then
 248                        echo
 249                        cat "$dotest/msg-clean"
 250                fi
 251                if test '' != "$ADD_SIGNOFF"
 252                then
 253                        echo "$ADD_SIGNOFF"
 254                fi
 255        } >"$dotest/final-commit"
 256
 257        if test "$interactive" = t
 258        then
 259            action=again
 260            while test "$action" = again
 261            do
 262                echo "Commit Body is:"
 263                echo "--------------------------"
 264                cat "$dotest/final-commit"
 265                echo "--------------------------"
 266                echo -n "Apply? [y]es/[n]o/[e]dit/[a]ccept all "
 267                read reply
 268                case "$reply" in
 269                y*|Y*) action=yes ;;
 270                a*|A*) action=yes interactive= ;;
 271                n*|N*) action=skip ;;
 272                e*|E*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 273                       action=again ;;
 274                esac
 275            done
 276        else
 277            action=yes
 278        fi
 279
 280        if test $action = skip
 281        then
 282                go_next
 283                continue
 284        fi
 285
 286        if test -x "$GIT_DIR"/hooks/applypatch-msg
 287        then
 288                "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 289                stop_here $this
 290        fi
 291
 292        echo
 293        echo "Applying '$SUBJECT'"
 294        echo
 295
 296        git-apply --index "$dotest/patch"; apply_status=$?
 297        if test $apply_status = 1 && test "$threeway" = t
 298        then
 299                (fall_back_3way) || stop_here $this
 300
 301                # Applying the patch to an earlier tree and merging the
 302                # result may have produced the same tree as ours.
 303                if test '' = "$(git-diff-index --cached --name-only -z HEAD)"
 304                then
 305                        echo No changes -- Patch already applied.
 306                        go_next
 307                        continue
 308                fi
 309        fi
 310        if test $apply_status != 0
 311        then
 312                echo Patch failed at $msgnum.
 313                stop_here $this
 314        fi
 315
 316        if test -x "$GIT_DIR"/hooks/pre-applypatch
 317        then
 318                "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 319        fi
 320
 321        tree=$(git-write-tree) &&
 322        echo Wrote tree $tree &&
 323        parent=$(git-rev-parse --verify HEAD) &&
 324        commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 325        echo Committed: $commit &&
 326        git-update-ref HEAD $commit $parent ||
 327        stop_here $this
 328
 329        if test -x "$GIT_DIR"/hooks/post-applypatch
 330        then
 331                "$GIT_DIR"/hooks/post-applypatch
 332        fi
 333
 334        go_next
 335done
 336
 337rm -fr "$dotest"