Merge branch 'np/maint-limit-delta-cache'
[gitweb.git] / git-am.sh
index 578780be138b216dc89333e1fde87ddcb91e5e54..d64d9975358a6b9a18596c45b13434463903a344 100755 (executable)
--- a/git-am.sh
+++ b/git-am.sh
@@ -11,6 +11,7 @@ git am [options] (--resolved | --skip | --abort)
 i,interactive   run interactively
 b,binary*       (historical option -- no-op)
 3,3way          allow fall back on 3way merging if needed
+q,quiet         be quiet
 s,signoff       add a Signed-off-by line to the commit message
 u,utf8          recode into utf8 (default)
 k,keep          pass -k flag to git-mailinfo
@@ -18,6 +19,7 @@ whitespace=     pass it through git-apply
 directory=      pass it through git-apply
 C=              pass it through git-apply
 p=              pass it through git-apply
+patch-format=   format the patch(es) are in
 reject          pass it through git-apply
 resolvemsg=     override error message when patch failure occurs
 r,resolved      to be used after a patch failure
@@ -99,7 +101,7 @@ fall_back_3way () {
     git write-tree >"$dotest/patch-merge-base+" ||
     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
 
-    echo Using index info to reconstruct a base tree...
+    say Using index info to reconstruct a base tree...
     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
        git apply --cached <"$dotest/patch"
     then
@@ -115,7 +117,7 @@ It does not apply to blobs recorded in its index."
     orig_tree=$(cat "$dotest/patch-merge-base") &&
     rm -fr "$dotest"/patch-merge-* || exit 1
 
-    echo Falling back to patching base and 3-way merge...
+    say Falling back to patching base and 3-way merge...
 
     # This is not so wrong.  Depending on which base we picked,
     # orig_tree may be wildly different from ours, but his_tree
@@ -125,6 +127,10 @@ It does not apply to blobs recorded in its index."
 
     eval GITHEAD_$his_tree='"$FIRSTLINE"'
     export GITHEAD_$his_tree
+    if test -n "$GIT_QUIET"
+    then
+           export GIT_MERGE_VERBOSITY=0
+    fi
     git-merge-recursive $orig_tree -- HEAD $his_tree || {
            git rerere
            echo Failed to merge in the changes.
@@ -133,6 +139,126 @@ It does not apply to blobs recorded in its index."
     unset GITHEAD_$his_tree
 }
 
+clean_abort () {
+       test $# = 0 || echo >&2 "$@"
+       rm -fr "$dotest"
+       exit 1
+}
+
+patch_format=
+
+check_patch_format () {
+       # early return if patch_format was set from the command line
+       if test -n "$patch_format"
+       then
+               return 0
+       fi
+
+       # we default to mbox format if input is from stdin and for
+       # directories
+       if test $# = 0 || test "x$1" = "x-" || test -d "$1"
+       then
+               patch_format=mbox
+               return 0
+       fi
+
+       # otherwise, check the first few lines of the first patch to try
+       # to detect its format
+       {
+               read l1
+               read l2
+               read l3
+               case "$l1" in
+               "From "* | "From: "*)
+                       patch_format=mbox
+                       ;;
+               '# This series applies on GIT commit'*)
+                       patch_format=stgit-series
+                       ;;
+               "# HG changeset patch")
+                       patch_format=hg
+                       ;;
+               *)
+                       # if the second line is empty and the third is
+                       # a From, Author or Date entry, this is very
+                       # likely an StGIT patch
+                       case "$l2,$l3" in
+                       ,"From: "* | ,"Author: "* | ,"Date: "*)
+                               patch_format=stgit
+                               ;;
+                       *)
+                               ;;
+                       esac
+                       ;;
+               esac
+       } < "$1" || clean_abort
+}
+
+split_patches () {
+       case "$patch_format" in
+       mbox)
+               git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||
+               clean_abort
+               ;;
+       stgit-series)
+               if test $# -ne 1
+               then
+                       clean_abort "Only one StGIT patch series can be applied at once"
+               fi
+               series_dir=`dirname "$1"`
+               series_file="$1"
+               shift
+               {
+                       set x
+                       while read filename
+                       do
+                               set "$@" "$series_dir/$filename"
+                       done
+                       # remove the safety x
+                       shift
+                       # remove the arg coming from the first-line comment
+                       shift
+               } < "$series_file" || clean_abort
+               # set the patch format appropriately
+               patch_format=stgit
+               # now handle the actual StGIT patches
+               split_patches "$@"
+               ;;
+       stgit)
+               this=0
+               for stgit in "$@"
+               do
+                       this=`expr "$this" + 1`
+                       msgnum=`printf "%0${prec}d" $this`
+                       # Perl version of StGIT parse_patch. The first nonemptyline
+                       # not starting with Author, From or Date is the
+                       # subject, and the body starts with the next nonempty
+                       # line not starting with Author, From or Date
+                       perl -ne 'BEGIN { $subject = 0 }
+                               if ($subject > 1) { print ; }
+                               elsif (/^\s+$/) { next ; }
+                               elsif (/^Author:/) { print s/Author/From/ ; }
+                               elsif (/^(From|Date)/) { print ; }
+                               elsif ($subject) {
+                                       $subject = 2 ;
+                                       print "\n" ;
+                                       print ;
+                               } else {
+                                       print "Subject: ", $_ ;
+                                       $subject = 1;
+                               }
+                       ' < "$stgit" > "$dotest/$msgnum" || clean_abort
+               done
+               echo "$this" > "$dotest/last"
+               this=
+               msgnum=
+               ;;
+       *)
+               clean_abort "Patch format $patch_format is not supported."
+               ;;
+       esac
+}
+
 prec=4
 dotest="$GIT_DIR/rebase-apply"
 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
@@ -175,12 +301,16 @@ do
                git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
        -C|-p)
                git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
+       --patch-format)
+               shift ; patch_format="$1" ;;
        --reject)
                git_apply_opt="$git_apply_opt $1" ;;
        --committer-date-is-author-date)
                committer_date_is_author_date=t ;;
        --ignore-date)
                ignore_date=t ;;
+       -q|--quiet)
+               GIT_QUIET=t ;;
        --)
                shift; break ;;
        *)
@@ -274,12 +404,12 @@ else
                done
                shift
        fi
-       git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
-               rm -fr "$dotest"
-               exit 1
-       }
 
-       # -s, -u, -k, --whitespace, -3, -C and -p flags are kept
+       check_patch_format "$@"
+
+       split_patches "$@"
+
+       # -s, -u, -k, --whitespace, -3, -C, -q and -p flags are kept
        # for the resuming session after a patch failure.
        # -i can and must be given when resuming.
        echo " $git_apply_opt" >"$dotest/apply-opt"
@@ -287,6 +417,7 @@ else
        echo "$sign" >"$dotest/sign"
        echo "$utf8" >"$dotest/utf8"
        echo "$keep" >"$dotest/keep"
+       echo "$GIT_QUIET" >"$dotest/quiet"
        echo 1 >"$dotest/next"
        if test -n "$rebasing"
        then
@@ -327,6 +458,10 @@ if test "$(cat "$dotest/keep")" = t
 then
        keep=-k
 fi
+if test "$(cat "$dotest/quiet")" = t
+then
+       GIT_QUIET=t
+fi
 if test "$(cat "$dotest/threeway")" = t
 then
        threeway=t
@@ -352,7 +487,7 @@ fi
 
 if test "$this" -gt "$last"
 then
-       echo Nothing to do.
+       say Nothing to do.
        rm -fr "$dotest"
        exit
 fi
@@ -498,11 +633,18 @@ do
                stop_here $this
        fi
 
-       printf 'Applying: %s\n' "$FIRSTLINE"
+       say "Applying: $FIRSTLINE"
 
        case "$resolved" in
        '')
-               eval 'git apply '"$git_apply_opt"' --index "$dotest/patch"'
+               # When we are allowed to fall back to 3-way later, don't give
+               # false errors during the initial attempt.
+               squelch=
+               if test "$threeway" = t
+               then
+                       squelch='>/dev/null 2>&1 '
+               fi
+               eval "git apply $squelch$git_apply_opt"' --index "$dotest/patch"'
                apply_status=$?
                ;;
        t)
@@ -534,7 +676,7 @@ do
                    # Applying the patch to an earlier tree and merging the
                    # result may have produced the same tree as ours.
                    git diff-index --quiet --cached HEAD -- && {
-                       echo No changes -- Patch already applied.
+                       say No changes -- Patch already applied.
                        go_next
                        continue
                    }
@@ -560,7 +702,7 @@ do
                        GIT_AUTHOR_DATE=
                fi
                parent=$(git rev-parse --verify -q HEAD) ||
-               echo >&2 "applying to an empty history"
+               say >&2 "applying to an empty history"
 
                if test -n "$committer_date_is_author_date"
                then