Skip common emacs and vim temporary files in index and list.

refs gh-171
refs gh-173

nb

@@ -1213,6 +1213,16 @@ _COLUMNS="$(_tput cols)"
 # An array of supported aggregate file types.
 _FILE_TYPES=(archive audio bookmark document folder image text video)
 
+# $_IGNORE_PATTERNS
+#
+# An array of filename patterns to ignore, formatted as `sed -e` arguments.
+_IGNORE_PATTERNS=(
+  -e "/~$/d"
+  -e "/^#.*#$/d"
+  -e "/\.swa?p$/d"
+  -e "/^\.#*/d"
+)
+
 # $_MD
 #
 # Middle dot character.
@@ -4313,7 +4323,9 @@ _index() {
 
       if ! grep -q "^${_basename}$" "${_index_path}"
       then
-        printf "%s\\n" "${_basename}" >> "${_index_path}"
+        {
+          printf "%s\\n" "${_basename}" | sed -E "${_IGNORE_PATTERNS[@]:-}"
+        } >> "${_index_path}"
       fi
       ;;
     delete)
@@ -5364,6 +5376,8 @@ _list() {
         _list_files "${_list_path}" "${_list_files_options[@]:-}" || :
       fi
     fi
+  } | {
+    sed -E "${_IGNORE_PATTERNS[@]:-}"
   } | {
     local _filenames_count=0
     local _matches=0

test/index.bats

@@ -100,6 +100,39 @@ load test_helper
   [[ -z "${lines[1]}"                                 ]]
 }
 
+@test "'index add <filename>' skips temporary files." {
+  {
+    "${_NB}" init
+
+    declare _temp_filenames=(
+      "Example Temp One.md~"
+      "#Example Temp Two.md#"
+      "Example Temp Three.md.swp"
+      "Example Temp Four.md.swap"
+      ".#Example Temp Five.md"
+    )
+
+    declare __filename=
+    for     __filename in "${_temp_filenames[@]:-}"
+    do
+      "${_NB}" run touch "${__filename:-}"
+    done
+  }
+
+  declare __filename=
+  for     __filename in "${_temp_filenames[@]:-}"
+  do
+    run "${_NB}" index add "${__filename:-}"
+
+    printf "\${status}: '%s'\\n" "${status}"
+    printf "\${output}: '%s'\\n" "${output}"
+
+    [[    "${status}" -eq 0                 ]]
+    [[ -z "${output}"                       ]]
+    [[ -z "$(cat "${NB_DIR/home/.index}")"  ]]
+  done
+}
+
 # get_basename ################################################################
 
 @test "'index get_basename' with valid index prints the filename for an id." {

test/list.bats

@@ -2,6 +2,40 @@
 
 load test_helper
 
+# temporary files #############################################################
+
+@test "'list' ignores common temporary files." {
+  {
+    "${_NB}" init
+
+    "${_NB}" add "File One.md" --content "Example content one."
+    "${_NB}" add "File Two.md" --content "Example content two."
+
+    "${_NB}" run touch "Example Temp One.md~"
+    "${_NB}" run touch "#Example Temp Two.md#"
+    "${_NB}" run touch "Example Temp Three.md.swp"
+    "${_NB}" run touch "Example Temp Four.md.swap"
+    "${_NB}" run touch ".#Example Temp Five.md"
+
+    "${_NB}" add "File Three.md" --content "Example content three."
+  }
+
+  run "${_NB}" list
+
+  printf "\${status}: '%s'\\n" "${status}"
+  printf "\${output}: '%s'\\n" "${output}"
+
+  [[ "${status}"    -eq 0 ]]
+  [[ "${#lines[@]}" -eq 3 ]]
+
+  [[ "${lines[0]}"  =~  \
+.*[.*3.*].*\ File\ Three\.md\ \·\ \"Example\ content\ three\.\" ]]
+  [[ "${lines[1]}"  =~  \
+.*[.*2.*].*\ File\ Two\.md\ \·\ \"Example\ content\ two\.\"     ]]
+  [[ "${lines[2]}"  =~  \
+.*[.*1.*].*\ File\ One\.md\ \·\ \"Example\ content\ one\.\"     ]]
+}
+
 # list content (title, filename, first line) ##################################
 
 @test "'list' includes titles when present, otherwise filenames with first lines." {