archive: refactor file extension format-guessing

diff --git a/git-bisect.sh b/git-bisect.sh
index 8b3c5858a901619eecd162229f92eb431b3e63f9..415a8d04ccc4f313eb111a3bbfbf2af2382beebd 100755 (executable)
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -288,10 +288,12 @@ bisect_visualize() {
 
        if test $# = 0
        then
-               case "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" in
-               '')     set git log ;;
-               set*)   set gitk ;;
-               esac
+               if test -n "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" &&
+                  type gitk >/dev/null 2>&1; then
+                       set gitk
+               else
+                       set git log
+               fi
        else
                case "$1" in
                git*|tig) ;;
@@ -300,8 +302,7 @@ bisect_visualize() {
                esac
        fi
 
-       not=$(git for-each-ref --format='%(refname)' "refs/bisect/good-*")
-       eval '"$@"' refs/bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
+       eval '"$@"' --bisect -- $(cat "$GIT_DIR/BISECT_NAMES")
 }
 
 bisect_reset() {
@@ -317,7 +318,12 @@ bisect_reset() {
        *)
            usage ;;
        esac
-       git checkout "$branch" -- && bisect_clean_state
+       if git checkout "$branch" -- ; then
+               bisect_clean_state
+       else
+               die "Could not check out original HEAD '$branch'." \
+                               "Try 'git bisect reset <commit>'."
+       fi
 }
 
 bisect_clean_state() {
@@ -339,6 +345,7 @@ bisect_clean_state() {
 }
 
 bisect_replay () {
+       test "$#" -eq 1 || die "No logfile given"
        test -r "$1" || die "cannot read $1 for replaying"
        bisect_reset
        while read git bisect command rev
@@ -393,7 +400,7 @@ bisect_run () {
 
       cat "$GIT_DIR/BISECT_RUN"
 
-      if grep "first bad commit could be any of" "$GIT_DIR/BISECT_RUN" \
+      if sane_grep "first bad commit could be any of" "$GIT_DIR/BISECT_RUN" \
                > /dev/null; then
          echo >&2 "bisect run cannot continue any more"
          exit $res
@@ -405,7 +412,7 @@ bisect_run () {
          exit $res
       fi
 
-      if grep "is the first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
+      if sane_grep "is the first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
          echo "bisect run success"
          exit 0;
       fi
@@ -413,6 +420,10 @@ bisect_run () {
     done
 }
 
+bisect_log () {
+       test -s "$GIT_DIR/BISECT_LOG" || die "We are not bisecting."
+       cat "$GIT_DIR/BISECT_LOG"
+}
 
 case "$#" in
 0)
@@ -439,7 +450,7 @@ case "$#" in
     replay)
        bisect_replay "$@" ;;
     log)
-       cat "$GIT_DIR/BISECT_LOG" ;;
+       bisect_log ;;
     run)
         bisect_run "$@" ;;
     *)