Using Git to Figure out How Long a Line of Text Has Been In a File -

suppose have file1.txt in git repository. suppose file has line of text: an old line of text.

is there way figure out, through git (or other unix utility?) how many days line of text has been in file?

you can use

datefrom=$(git log --pretty=format:'%cd' --date=format:'%y-%m-%d' -s 'line find' -- file1.txt) 

that result in date of commit introduced string.

• log searches commit history
• -s option finds first introduction of string
• --pretty=format:'%ad' prints committer date
• --date=format formats date

now this: https://unix.stackexchange.com/questions/215934/whats-a-smart-way-to-count-the-number-of-days-since-x get:

echo $(( (`date +%s` - `date +%s -d $(datefrom)`) / 86400 )) 

which results in number of days introducing commit.

ofcourse can put in 1 command , make alias, or can create git-command-name script , put user/bin folder , git recognize git command can invoke

git command-name 'line find'