Run pandoc from the <path> directory when present.

refs gh-283

nb

@@ -2797,6 +2797,11 @@ _pandoc() {
 
   [[ -n "${1:-}" ]] && _pandoc_arguments+=("${@}")
 
+  if [[ -n "${_path:-}" ]]
+  then
+    cd "${_path%/*}"
+  fi
+
   if _command_exists "iconv"          &&  {
        ((_read_from_standard_input))  ||  _file_is_text "${_path:-}"
      }

test/export.bats

@@ -2,6 +2,39 @@
 
 load test_helper
 
+# embedded resources ##########################################################
+
+@test "'export' with reference to image in same directory embeds image." {
+  {
+    "${_NB}" init
+    "${_NB}" add                                                      \
+      --content   "# Export Example${_NEWLINE}${_NEWLINE}![](nb.png)" \
+      --filename  "Example File.md"
+
+    "${_NB}" import "${NB_TEST_BASE_PATH}/fixtures/nb.png"
+
+
+    [[ -f "${NB_DIR}/home/Example File.md"  ]]
+    [[ -f "${NB_DIR}/home/nb.png"           ]]
+  }
+
+  run "${_NB}" export pandoc 1 --embed-resources <<< "y${_NEWLINE}"
+
+  printf "\${status}: '%s'\\n" "${status}"
+  printf "\${output}: '%s'\\n" "${output}"
+
+  [[ "${output}" =~ \<p\>\<img\ src=\"data:image/png\;base64,iVBORw0KGgoAAAA ]]
+
+  run ! diff                      \
+    <(printf "%s\\n" "${output}") \
+    <(cat <<HEREDOC
+[WARNING] Could not fetch resource nb.png
+<h1 id="export-example">Export Example</h1>
+<p><img src="nb.png" /></p>
+HEREDOC
+    )
+}
+
 # existing file ###############################################################
 
 @test "'export' with file at export path prompts user to confirm overwrite." {