CODEWITHSUNDEEP
shellsedgrep
ogbofjnr
ogbofjnr

Reputation: 2038

Use sed to comment out .env entry

I'm writing a script that will comment and un-comment field in .env file.

sed -i "s/#SENDGRID_API_KEY/SENDGRID_API_KEY/g" $mlEnv

for uncomment

sed -i "s/[^#]SENDGRID_API_KEY/#SENDGRID_API_KEY/g" $mlEnv

for comment out, I use [^#] so that it will not add one more # when it is already commented

But second one doesnt work, although 

grep "[^#]SENDGRID_API_KEY" $mlEnv

works ok.

Upvotes: 2

Views: 104

Answers (3)

Ryszard Czech
Ryszard Czech

Reputation: 18641

Another try with sed similar to potong's:

sed 's/^[[:space:]]*#*[[:space:]]*\(SENDGRID_API_KEY\)/#\1/' file > newfile

The ^[[:space:]]*#*[[:space:]]*\(SENDGRID_API_KEY\) pattern matches any whitespace, 0+ hash chars, then again any whitespaces and then a SENDGRID_API_KEY word captured in Group 1. The replacement is # and then the captured value.

Upvotes: 0

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 627607

You may use

sed -i -E 's/(^|[^#])(SENDGRID_API_KEY)/\1#\2/g' "$mlEnv"

Here, -E enables POSIX ERE regex syntax, (^|[^#]) captures (into Group 1) either start of string or any char but # in Group 1 and (SENDGRID_API_KEY) captures SENDGRID_API_KEY in Group 2.

The \1#\2 replacement pattern replaces with Group 1 contents + # + Group 2 contents.

Variables which specify a file name argument should generally be within double quotes.

Upvotes: 2

potong
potong

Reputation: 58578

This might work for you (GNU sed):

sed -Ei 's/^#?(SENDGRID_API_KEY)/#\1/' file

This will replace a line beginning #SENDGRID_API_KEY or SENDGRID_API_KEY with #SENDGRID_API_KEY.

Upvotes: 1

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