support checkout commits

scripts/fcheckout

@@ -31,15 +31,22 @@ function usage() {
 
 all_files=""
 branch=""
+commits=""
 
-while getopts ":hab" opt
+while getopts ":habc" opt
 do
   case "$opt" in
     a)
       all_files='true'
+      break
       ;;
     b)
       branch='true'
+      break
+      ;;
+    c)
+      commits='true'
+      break
       ;;
     h)
       usage
@@ -64,30 +71,38 @@ if [[ -n "${branch}" ]]; then
     }' | \
     fzf --no-multi --header='select a branch to checkout' \
     --preview="/usr/bin/git --git-dir=${DOTBARE_DIR} --work-tree=${DOTBARE_TREE} log --oneline --graph --color=always --decorate=short {}")
-    [[ -z "${selected_branch}" ]] && exit 0
-    /usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" checkout "${selected_branch}"
-    exit 0
-fi
-
-if [[ -n "${all_files}" ]]; then
-  selected_files=$(/usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" ls-files --full-name --directory "${DOTBARE_TREE}" | \
-    fzf --multi --header='select a file to checkout version in HEAD' --preview "head -50 ${DOTBARE_TREE}/{}" | \
-    awk -v home="${DOTBARE_TREE}" '{print home "/" $0}')
+  [[ -z "${selected_branch}" ]] && exit 0
+  /usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" checkout "${selected_branch}"
+  exit 0
+elif [[ -n "${commits}" ]]; then
+  selected_commits=$(/usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" log --oneline --color=always --decorate=short | \
+    fzf --no-multi --header='select which commit to reset' --preview "echo {} | awk '{print \$1}' | \
+      xargs -I __ /usr/bin/git --git-dir=${DOTBARE_DIR} --work-tree=${DOTBARE_TREE} show --color=always  __" | \
+    awk '{print $1}')
+  [[ -z "${selected_commits}" ]] && exit 0
+  /usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" checkout "${selected_commits}"
+  exit 0
 else
-  selected_files=$(/usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" diff --name-status | \
-    awk '{print "\033[31m" $1 " " $2}' | \
-    fzf --multi --header='select a file to checkout version in HEAD' \
-    --preview "echo {} | awk '{print \$2}' | \
-      xargs -I __ /usr/bin/git --git-dir=${DOTBARE_DIR} --work-tree=${DOTBARE_TREE} diff --color=always ${DOTBARE_TREE}/__" | \
-    awk -v home="${DOTBARE_TREE}" '{print home "/" $2}')
+  if [[ -n "${all_files}" ]]; then
+    selected_files=$(/usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" ls-files --full-name --directory "${DOTBARE_TREE}" | \
+      fzf --multi --header='select a file to checkout version in HEAD' --preview "head -50 ${DOTBARE_TREE}/{}" | \
+      awk -v home="${DOTBARE_TREE}" '{print home "/" $0}')
+  else
+    selected_files=$(/usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" diff --name-status | \
+      awk '{print "\033[31m" $1 " " $2}' | \
+      fzf --multi --header='select a file to checkout version in HEAD' \
+      --preview "echo {} | awk '{print \$2}' | \
+        xargs -I __ /usr/bin/git --git-dir=${DOTBARE_DIR} --work-tree=${DOTBARE_TREE} diff --color=always ${DOTBARE_TREE}/__" | \
+      awk -v home="${DOTBARE_TREE}" '{print home "/" $2}')
+  fi
+  [[ -z "${selected_files}" ]] && exit 0
+  while IFS= read -r line; do
+    echo "(dryrun) dotbare checkout -- ${line}"
+  done <<< "${selected_files}"
+  confirm=$(get_confirmation "Confirm?")
+  [[ "${confirm}" != 'y' ]] && exit 0
+  while IFS= read -r line; do
+    /usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" checkout -- "${line}"
+    echo "${line} checkout success"
+  done <<< "${selected_files}"
 fi
-[[ -z "${selected_files}" ]] && exit 0
-while IFS= read -r line; do
-  echo "(dryrun) dotbare checkout -- ${line}"
-done <<< "${selected_files}"
-confirm=$(get_confirmation "Confirm?")
-[[ "${confirm}" != 'y' ]] && exit 0
-while IFS= read -r line; do
-  /usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" checkout -- "${line}"
-  echo "${line} checkout success"
-done <<< "${selected_files}"