feat: add git add --patch interactive command (#53)

I use --patch quite a lot when doing commits. This adds patch support as a separate command.

lib/modules/helpers/status.sh

@@ -43,6 +43,19 @@ gf_helper_status_add() {
   gf_command_logged git add -- "$@"
 }
 
+gf_helper_status_add_patch() {
+  if [ "$#" = 0 ]; then
+    gf_log_error 'tried to git add --patch with no file(s)'
+  else
+    gf_interactive_command_logged git add --patch -- "$@" < /dev/tty
+  fi
+
+  # if there's more to commit, loop right back into the status view
+  if [ -n "$(git status -s)" ]; then
+    gf_interactive_command_logged git fuzzy status
+  fi
+}
+
 gf_helper_status_reset() {
   gf_command_logged git reset -- "$@"
 }
@@ -71,6 +84,8 @@ gf_helper_status_edit() {
 gf_helper_status_commit() {
   # shellcheck disable=2086
   gf_interactive_command_logged git commit
+
+  # if there's more to commit, loop right back into the status view
   if [ -n "$(git status -s)" ]; then
     gf_interactive_command_logged git fuzzy status
   fi

lib/modules/status.sh

@@ -2,6 +2,7 @@
 # shellcheck disable=2016
 
 GIT_FUZZY_STATUS_ADD_KEY="${GIT_FUZZY_STATUS_ADD_KEY:-Alt-S}"
+GIT_FUZZY_STATUS_ADD_PATCH_KEY="${GIT_FUZZY_STATUS_ADD_PATCH_KEY:-Alt-P}"
 GIT_FUZZY_STATUS_EDIT_KEY="${GIT_FUZZY_STATUS_EDIT_KEY:-Alt-E}"
 GIT_FUZZY_STATUS_COMMIT_KEY="${GIT_FUZZY_STATUS_COMMIT_KEY:-Alt-C}"
 GIT_FUZZY_STATUS_RESET_KEY="${GIT_FUZZY_STATUS_RESET_KEY:-Alt-R}"
@@ -11,7 +12,8 @@ GF_STATUS_HEADER='
 Type to filter. '"${WHITE}Enter${NORMAL} to ${GREEN}ACCEPT${NORMAL}"'
 
   '"${GRAY}-- (${NORMAL}*${GRAY}) editor: ${MAGENTA}${EDITOR} ${NORMAL}${GF_EDITOR_ARGS}${NORMAL}"'
-  '"                                      * ${GREEN}${BOLD}edit ✎${NORMAL}  ${WHITE}$GIT_FUZZY_STATUS_EDIT_KEY${NORMAL}"'
+  '""'
+  '"               ${GREEN}stage -p ${BOLD}⇡  ${NORMAL}${WHITE}${GIT_FUZZY_STATUS_ADD_PATCH_KEY}${NORMAL}       * ${GREEN}${BOLD}edit ✎${NORMAL}  ${WHITE}$GIT_FUZZY_STATUS_EDIT_KEY${NORMAL}"'
    '"${GREEN}all ☑${NORMAL}  ${WHITE}${GIT_FUZZY_SELECT_ALL_KEY}${NORMAL}     ${GREEN}stage ${BOLD}⇡${NORMAL}  ${WHITE}$GIT_FUZZY_STATUS_ADD_KEY${NORMAL}     ${RED}${BOLD}discard ✗${NORMAL}  ${WHITE}$GIT_FUZZY_STATUS_DISCARD_KEY${NORMAL}"'
   '"${GREEN}none ☐${NORMAL}  ${WHITE}${GIT_FUZZY_SELECT_NONE_KEY}${NORMAL}     ${GREEN}reset ${RED}${BOLD}⇣${NORMAL}  ${WHITE}$GIT_FUZZY_STATUS_RESET_KEY${NORMAL}    * ${RED}${BOLD}commit ${NORMAL}${RED}⇧${NORMAL}  ${WHITE}$GIT_FUZZY_STATUS_COMMIT_KEY${NORMAL}"'
 
@@ -23,11 +25,10 @@ fi
 
 gf_fzf_status() {
   RELOAD="reload:git fuzzy helper status_menu_content"
-  # doesn't work
 
   gf_fzf -m --header "$GF_STATUS_HEADER" \
             --header-lines=2 \
-            --expect="$(lowercase "$GIT_FUZZY_STATUS_EDIT_KEY"),$(lowercase "$GIT_FUZZY_STATUS_COMMIT_KEY")" \
+            --expect="$(lowercase "$GIT_FUZZY_STATUS_EDIT_KEY"),$(lowercase "$GIT_FUZZY_STATUS_COMMIT_KEY"),$(lowercase "$GIT_FUZZY_STATUS_ADD_PATCH_KEY")" \
             --nth=2 \
             --preview 'git fuzzy helper status_preview_content {1} {2} {4}' \
             --bind "$(lowercase "$GIT_FUZZY_STATUS_ADD_KEY"):execute-silent(git fuzzy helper status_add {+2..})+down+$RELOAD" \
@@ -39,10 +40,15 @@ gf_status_interpreter() {
   CONTENT="$(cat -)"
   HEAD="$(echo "$CONTENT" | head -n1)"
   TAIL="$(echo "$CONTENT" | tail -n +2)"
+
   if [ "$(lowercase "$HEAD")" = "$(lowercase "$GIT_FUZZY_STATUS_EDIT_KEY")" ]; then
-    eval "git fuzzy helper status_edit $(echo "$TAIL" | cut -c4- | join_lines_quoted)"
+    local selected_file=$(echo "$TAIL" | cut -c4- | join_lines_quoted)
+    eval "git fuzzy helper status_edit $selected_file"
   elif [ "$(lowercase "$HEAD")" = "$(lowercase "$GIT_FUZZY_STATUS_COMMIT_KEY")" ]; then
     eval "git fuzzy helper status_commit"
+  elif [ "$(lowercase "$HEAD")" = "$(lowercase "$GIT_FUZZY_STATUS_ADD_PATCH_KEY")" ]; then
+    local selected_file=$(echo "$TAIL" | cut -c4- | join_lines_quoted)
+    eval "git fuzzy helper status_add_patch $selected_file"
   else
     echo "$TAIL" | cut -c4-
   fi