Add prefix oriented completions for diff and format-patch commands.

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 73ed095487fc4e9590e185b69c86ac67a6e48a8d..4d81963b1d00b1b4e874330a9e5933111f491def 100755 (executable)
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -121,13 +121,21 @@ __gitcomp ()
        if [ $# -gt 2 ]; then
                cur="$3"
        fi
-       for c in $1; do
-               case "$c$4" in
-               --*=*) all="$all$c$4$s" ;;
-               *.)    all="$all$c$4$s" ;;
-               *)     all="$all$c$4 $s" ;;
-               esac
-       done
+       case "$cur" in
+       --*=)
+               COMPREPLY=()
+               return
+               ;;
+       *)
+               for c in $1; do
+                       case "$c$4" in
+                       --*=*) all="$all$c$4$s" ;;
+                       *.)    all="$all$c$4$s" ;;
+                       *)     all="$all$c$4 $s" ;;
+                       esac
+               done
+               ;;
+       esac
        IFS=$s
        COMPREPLY=($(compgen -P "$2" -W "$all" -- "$cur"))
        return
@@ -631,7 +639,9 @@ _git_diff ()
                        --find-copies-harder --pickaxe-all --pickaxe-regex
                        --text --ignore-space-at-eol --ignore-space-change
                        --ignore-all-space --exit-code --quiet --ext-diff
-                       --no-ext-diff"
+                       --no-ext-diff
+                       --no-prefix --src-prefix= --dst-prefix=
+                       "
                return
                ;;
        esac
@@ -688,6 +698,7 @@ _git_format_patch ()
                        --full-index --binary
                        --not --all
                        --cover-letter
+                       --no-prefix --src-prefix= --dst-prefix=
                        "
                return
                ;;
@@ -841,8 +852,8 @@ _git_push ()
 
 _git_rebase ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
-       if [ -d .dotest ] || [ -d .git/.dotest-merge ]; then
+       local cur="${COMP_WORDS[COMP_CWORD]}" dir="$(__gitdir)"
+       if [ -d .dotest ] || [ -d "$dir"/.dotest-merge ]; then
                __gitcomp "--continue --skip --abort"
                return
        fi
@@ -857,7 +868,7 @@ _git_rebase ()
                return
                ;;
        --*)
-               __gitcomp "--onto --merge --strategy"
+               __gitcomp "--onto --merge --strategy --interactive"
                return
        esac
        __gitcomp "$(__git_refs)"
@@ -991,7 +1002,8 @@ _git_config ()
                gitcvs.enabled
                gitcvs.logfile
                gitcvs.allbinary
-               gitcvs.dbname gitcvs.dbdriver gitcvs.dbuser gitcvs.dvpass
+               gitcvs.dbname gitcvs.dbdriver gitcvs.dbuser gitcvs.dbpass
+               gitcvs.dbtablenameprefix
                gc.packrefs
                gc.reflogexpire
                gc.reflogexpireunreachable
@@ -1271,11 +1283,14 @@ _git ()
                case "${COMP_WORDS[COMP_CWORD]}" in
                --*=*) COMPREPLY=() ;;
                --*)   __gitcomp "
+                       --paginate
                        --no-pager
                        --git-dir=
                        --bare
                        --version
                        --exec-path
+                       --work-tree=
+                       --help
                        "
                        ;;
                *)     __gitcomp "$(__git_commands) $(__git_aliases)" ;;