Bob finds the author of a typo

Here we will see how Bob is able to trace who introduced a bug in the novel, in the form of a spelling error.

Lab: Alice

  • Alice worked for a lot hours today, and although she is exhausted, she also wants to review the state of the book. So she goes to her repo and gets the updates
cd
cd alice/book
git pull origin main
  • The new chapter written by Bob looks very promising! But Alice notices a problem: John is not living in the lighthouse anymore. So she will help his mate correcting it… but she will inadvertently also introduce another type of error in the sentence:
sed -i "s/the lighthouse/the olt man's home/" chapter-04.md
cat chapter-04.md
  • Job done, add, commit and push… but she is so tired that the commit message is no specially inspired
git add chapter-04.md
git commit -m "Minor change"
git push origin main
  • And, finally, she leaves her working area
cd ../..

Lab: Bob

  • After the weekend, Bob comes back to the old computer continue the development of his chapter
cd
cd bob/book
git pull origin main
  • When he starts editing the text of chapter four, he realizes there is something odd… a typo in a sentence he doesn’t remember to have introduced
cat chapter-04.md | grep "the olt man's home" -C 999
Well... maybe he made a change in the text and doesn't remember it. Or not. He needs to know, so he asks `git` about who wrote each line of the book:
git █████ chapter-04.md \
  | grep -e Alice -e Bob

Solution

git blame chapter-04.md \
  | grep -e Alice -e Bob
  • Ok, mystery solved: so it was a change made by Alice. Bob agrees with the modification, so he just needs to update the wrong word
sed -i "s/the olt/the old/" chapter-04.md
cat chapter-04.md | grep "the old man's home" -C 9999
  • And store it in the common repo
git add chapter-04.md
git commit -m "Fixed typo"
git push origin main
  • Bob exists his working directory
cd ../..