Batch editing files with ed

Post by Symbiote » Sat, May 12, 2018, 10:45 PM UTC

fakedrake wrote: post #35

Good to know about ed! Since noone else has mentioned this, emacs' keyboard macros seem much easier to me especially since more than the basic editing stuff off awk/ed/sed i can leverage all the editor extensions and modifications i have accumulated over the years. That is unless its tens of thousands of files and the edit is exceptionally simple. I would write a script in that case too.

  key   value
  salt  pepper
  fish  chips
  vodka orange
  rum   cola

Post by textmode » Sat, May 12, 2018, 10:55 PM UTC

bewuethr wrote: post #38

textmode wrote: post #15

echo -e '/-baz\n+1\ni\n-elephant\n.\nw\nq\n'|ed foo but ed requires a temp file in $TMPDIR to save changes for speed, put $TMPDIR on memory file system sed requires no temp file 1.sed: /-baz/a\ -elephant sed -f 1.sed foo|sed -a wfoo works with all versions of sed, e.g., not all versions support "\n" in patterns nor so-called "edit-in-place" automatic temp file creation and removal

The sed command doesn't get the indentation right, though, as the article says it could be indented by two or four spaces.

   1.sed:
   s/- baz/- elephant/;
   /^  - elephant/{h;G;}
   /^    - elephant/{h;G;}
   s/- elephant/- baz/;

   sed -f 1.sed foo|sed -a wfoo

   1.sed:
   /^  - baz/a\
     - elephant
   

   /^    - baz/a\
       - elephant
   

   sed -f 1.sed foo|sed -a wfoo

Post by 8077628 » Sat, May 12, 2018, 11:08 PM UTC

Post by rbonvall » Sat, May 12, 2018, 11:45 PM UTC

Symbiote wrote: post #41

fakedrake wrote: post #35

Good to know about ed! Since noone else has mentioned this, emacs' keyboard macros seem much easier to me especially since more than the basic editing stuff off awk/ed/sed i can leverage all the editor extensions and modifications i have accumulated over the years. That is unless its tens of thousands of files and the edit is exceptionally simple. I would write a script in that case too.

Since discovering them, I use Emacs keyboard macros all the time. Let's say I have: key value salt pepper fish chips vodka orange rum cola and I want the second column in uppercase. to start recording a macro. Alt →, → to position the cursor at "v" (or just →→→→→→ if this is a fixed width column), then Alt U to uppercase the next word. → to move the cursor one forward, to the start of the next line. to finish recordi…

    :%normal wgUaw

Post by fakedrake » Sun, May 13, 2018, 2:23 AM UTC

rbonvall wrote: post #47

Symbiote wrote: post #41

Earlier quoted context omitted.

Since discovering them, I use Emacs keyboard macros all the time. Let's say I have: key value salt pepper fish chips vodka orange rum cola and I want the second column in uppercase. to start recording a macro. Alt →, → to position the cursor at "v" (or just →→→→→→ if this is a fixed width column), then Alt U to uppercase the next word. → to move the cursor one forward, to the start of the next line. to finish recordi…

The equivalent in vim is: • qq to start recording a macro in register q, • w to jump to the second word, • gUaw to "go uppercase a word", • j to move to next line (↓ works as well), • q to stop recording, • 5@q to apply macro in register q five times. But in this example I would have probably used ex command: :%normal wgUaw (for every line do as if I had typed wgUaw) or visualy selected the second column as a block a…