Bash – How to populate end tags using sed, awk or any other command

awkbashsedtext processing

I have a txt file that looks like this:

<sss>ss<

<firstword>anotherword<

I want it to look like this

<sss>ss</sss>

<firstword>anotherword</firstword>

Basically taking the first word and placing it in an end tag.

And before you asked what I have tried, the answer is nothing, I couldn't think of anything.

Best Answer

With input:

<abc>def<
<firstword>anotherword</firstword>
<ghi>klm<

Use:

sed 's/<\([^>]*\)>\(.*\)<$/<\1>\2<\/\1>/' input

Output:

<abc>def</abc>
<firstword>anotherword</firstword>
<ghi>klm</ghi>

The sed line only affects lines ending in < (because of the <$) and catches the patterns between the first <> pair and between '><' and pastes everything back in duplicating the first pair at the end (plus a closing '>')

Related Solutions

Using sed to extract text between 2 tags

Sounds like what you need is more something along the lines of

sed -n 's:.*<id>\(.*\)</id>.*:\1:p'

(assuming like in your sample that the <id> and </id> are on the same line and that there's only one <id>...</id> per line).

Or use a XML-aware tool:

xmlstarlet sel -t -v '//id' -n

Sed command that would ignore any commented match

You should not believe them if they tell you it cannot be done. You should believe them, however, if they tell you it's not easy.

sed '\|*/|!{ s|/\*|\n&|              #if ! */ repl 1st /* w/ \n/*
     h;      s|foo|bar|g;/\n/!b      #hold; repl all foo/bar; if ! \n branch
     G;      s|\n.*\n||;:n           #Get; clear difference; :new label
     n;      \|*/|!bn;s|^|\n/*|      #new line; if ! */ branch new label
     };s|*/|\n&|g                    #repl all */ w/ \n*/
       s|foo|&\nbar|g;:r             #repl all foo w/ foo\nbar
       s|\(/\*[^\n]*\)\nbar|\1|g;tr  #repl all /*[^\n]*\nbar w/ foo
       s|foo\n\(b\)|\1|g             #repl all foo\nbar w/ bar
       s|^\n/.||;s|\n||g             #clear any \n inserts
'    <<\INPUT
asfoo   /* asdfooasdfoo


asdfasdfoo
asdfasdfoo
foo */foo /*foo*/ foo
/*.
foo*/
foo
hello

INPUT

OUTPUT

asbar   /* asdfooasdfoo


asdfasdfoo
asdfasdfoo
foo */bar /*foo*/ bar
/*.
foo*/
bar
hello

Best Answer

Related Solutions

Using sed to extract text between 2 tags

Sed command that would ignore any commented match

OUTPUT

Related Question