How to make org-babel call all remote code blocks under a specific headline?

Question

For example, I have following org file:

***** user level

****** copy system service file

At first copy system's systemd service file to systemd user level. by check it
out, and tangle it to target file.

#+begin_src shell :results code :wrap "src systemd :tangle ~/.config/systemd/user/transmission.service" :cache no
systemctl cat transmission.service
#+end_src

#+RESULTS[<2018-03-01 16:25:30> 6f8f1e5900c5be8ab0fa4ee35ff6682e6bc752f0]:
#+begin_src systemd :tangle ~/.config/systemd/user/transmission.service
# /usr/lib/systemd/system/transmission.service
[Unit]
Description=Transmission BitTorrent Daemon
After=network.target

[Service]
User=transmission
Type=notify
ExecStart=/usr/bin/transmission-daemon -f --log-error
ExecReload=/bin/kill -s HUP $MAINPID

[Install]
WantedBy=multi-user.target
#+end_src

Then modify daemon run options:

****** specify daemon config file

#+begin_src shell :results code :wrap src systemd :cache no
gawk -i inplace '/ExecStart/ { gsub(/transmission-daemon/, "transmission-daemon -g ~/.config/transmission") }; { print }' ~/.config/systemd/user/transmission.service
cat ~/.config/systemd/user/transmission.service
#+end_src

#+RESULTS[<2018-03-01 16:31:51> 1b2d0ea649dc85ddc6e96d232d0c969888745a03]:
#+begin_src systemd
# /usr/lib/systemd/system/transmission.service
[Unit]
Description=Transmission BitTorrent Daemon
After=network.target

[Service]
User=transmission
Type=notify
ExecStart=/usr/bin/transmission-daemon -g ~/.config/transmission -f --log-error
ExecReload=/bin/kill -s HUP $MAINPID

[Install]
WantedBy=multi-user.target
#+end_src

I want to call all those src blocks under specific headline user level. Org-mode has a remote code block call syntax like this:

#+call: si.org:figure-1()

But it need to specify one src block. When I have many blocks under headline, I don't want to remote call one by one manually.

So is there a way to do it?

Answer 1

Ingest Named Code Blocks from other files using org-babel-lob-ingest

1. Add org-babel-lob-ingest command using File Local Variables syntax to ingest named src blocks from an external file for use in current file.

   • For example, to make the named blocks inside a file named named-blocks-file.org available to another org-mode file:

     1. Add the line below at the top of the other file, e.g. other-file.org.

        # -*- mode: org; org-confirm-babel-evaluate: nil; eval: (org-babel-lob-ingest "./named-blocks-file.org"); -*-
        

     2. Save and close other file.

     3. Open the other file again and then answer y when prompted to apply local variable.

        • If named-blocks-file.org contained the content below:

          * Heading1
          ** Subheading1
             #+NAME: Heading1/Subheading1-Code
             #+BEGIN_SRC shell 
               echo "Code from Heading1/Subheading1"
             #+END_SRC
          ** Subheading2
             #+NAME: Heading1/Subheading2-Code
             #+BEGIN_SRC shell 
               echo "Code from Heading1/Subheading2"
             #+END_SRC
          

        • You should see a message in the mini-buffer similar to the example below:

          2 src blocks added to Library of Babel
          

2. Evalute code blocks inside other file using following built-in methods:

   • Use #+CALL: Evaluation Remote Code Blocks

     ** Call =Heading1/Subheading1-Code=
        #+CALL: Heading1/Subheading1-Code()
     ** Call =Heading1/Subheading2-Code=
        #+CALL: Heading1/Subheading2-Code()
     

   • Use :noweb header to embed code or code results into code blocks

     • Embedding Code into Code Block

       #+BEGIN_SRC shell :noweb yes :shebang "#!/usr/bin/env bash"
          echo "Calling Embedded Remote Code"
          <<Heading1/Subheading1-Code>>
          <<Heading1/Subheading2-Code>>
       
       #+END_SRC
       

       • Is transformed into this script

         #+BEGIN_EXAMPLE shell
           #!/usr/bin/env bash
           echo "Calling Embedded Remote Code"
           echo "Code from Heading1/Subheading1"
           echo "Code from Heading1/Subheading2"
         
         #+END_EXAMPLE
         

   • Embedding Code Results

     • Embedding Code Results into Code Block

       #+BEGIN_SRC shell :noweb yes :shebang "#!/usr/bin/env bash"
         echo "Calling Embedded Remote Code Results"
         echo "Results: '<<Heading1/Subheading1-Code()>>'"
         echo "Results: '<<Heading1/Subheading2-Code()>>'"
       
       #+END_SRC
       

     • Is transformed into this script

       #+BEGIN_EXAMPLE shell
         #!/usr/bin/env bash
         echo "Calling Embedded Remote Code Results"
         echo "Results: 'Code from Heading1/Subheading1'"
         echo "Results: 'Code from Heading1/Subheading2'"
       
       #+END_EXAMPLE
       

---

This code was tested using:
emacs version: GNU Emacs 25.2.1 (x86_64-unknown-cygwin, GTK+ Version 3.22.10)
org-mode version: 9.1.2