Escaping Shell Command Arguments in Vim
up vote
2
down vote
favorite
I'm trying to fully understand the following command in Vim:
:exe "grep -R " . shellescape(expand("<cWORD>")) . " ."<cr>
I got the use of expand function (force the expansion of into the actual string before it gets passed to shellescape) and shellescape command itself ( from Vim help page: Escape {string} for use as a shell command argument).
What I do not understand, from help itself either, is that use of dots, one before and one after shellescape command.
Again, both of the dots are preceeded and followed by an empty space. And if I use :
:exe "grep -R "shellescape(expand("<cWORD>"))" ."<cr>
which is the same command without those dots, I (apparently) get the same result.
Can anybody give a detailed explanation?
Thank you
vimscript
asked Nov 25 at 17:04
Daniele
183
add a comment |
up vote
2
down vote
favorite
I'm trying to fully understand the following command in Vim:
:exe "grep -R " . shellescape(expand("<cWORD>")) . " ."<cr>
I got the use of expand function (force the expansion of into the actual string before it gets passed to shellescape) and shellescape command itself ( from Vim help page: Escape {string} for use as a shell command argument).
What I do not understand, from help itself either, is that use of dots, one before and one after shellescape command.
Again, both of the dots are preceeded and followed by an empty space. And if I use :
:exe "grep -R "shellescape(expand("<cWORD>"))" ."<cr>
which is the same command without those dots, I (apparently) get the same result.
Can anybody give a detailed explanation?
Thank you
vimscript
asked Nov 25 at 17:04
Daniele
183
add a comment |
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I'm trying to fully understand the following command in Vim:
:exe "grep -R " . shellescape(expand("<cWORD>")) . " ."<cr>
I got the use of expand function (force the expansion of into the actual string before it gets passed to shellescape) and shellescape command itself ( from Vim help page: Escape {string} for use as a shell command argument).
What I do not understand, from help itself either, is that use of dots, one before and one after shellescape command.
Again, both of the dots are preceeded and followed by an empty space. And if I use :
:exe "grep -R "shellescape(expand("<cWORD>"))" ."<cr>
which is the same command without those dots, I (apparently) get the same result.
Can anybody give a detailed explanation?
Thank you
vimscript
asked Nov 25 at 17:04
Daniele
183
I'm trying to fully understand the following command in Vim:
:exe "grep -R " . shellescape(expand("<cWORD>")) . " ."<cr>
I got the use of expand function (force the expansion of into the actual string before it gets passed to shellescape) and shellescape command itself ( from Vim help page: Escape {string} for use as a shell command argument).
What I do not understand, from help itself either, is that use of dots, one before and one after shellescape command.
Again, both of the dots are preceeded and followed by an empty space. And if I use :
:exe "grep -R "shellescape(expand("<cWORD>"))" ."<cr>
which is the same command without those dots, I (apparently) get the same result.
Can anybody give a detailed explanation?
Thank you
vimscript
vimscript
asked Nov 25 at 17:04
Daniele
183
asked Nov 25 at 17:04
Daniele
183
asked Nov 25 at 17:04
Daniele
183
asked Nov 25 at 17:04
Daniele
183
asked Nov 25 at 17:04
Daniele
183
183
add a comment |
add a comment |
1 Answer
1
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votes
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3
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If you pass multiple strings to the :execute command it will join them together, adding a space between each string. The . operator concatenates strings without adding a space. In this command, adding an extra space won’t break it, so either way works fine. See :help :execute and :help expr-..
answered Nov 25 at 17:48
Rich
14.3k11764
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
If you pass multiple strings to the :execute command it will join them together, adding a space between each string. The . operator concatenates strings without adding a space. In this command, adding an extra space won’t break it, so either way works fine. See :help :execute and :help expr-..
answered Nov 25 at 17:48
Rich
14.3k11764
add a comment |
up vote
3
down vote
accepted
If you pass multiple strings to the :execute command it will join them together, adding a space between each string. The . operator concatenates strings without adding a space. In this command, adding an extra space won’t break it, so either way works fine. See :help :execute and :help expr-..
answered Nov 25 at 17:48
Rich
14.3k11764
add a comment |
up vote
3
down vote
accepted
up vote
3
down vote
accepted
If you pass multiple strings to the :execute command it will join them together, adding a space between each string. The . operator concatenates strings without adding a space. In this command, adding an extra space won’t break it, so either way works fine. See :help :execute and :help expr-..
answered Nov 25 at 17:48
Rich
14.3k11764
If you pass multiple strings to the :execute command it will join them together, adding a space between each string. The . operator concatenates strings without adding a space. In this command, adding an extra space won’t break it, so either way works fine. See :help :execute and :help expr-..
answered Nov 25 at 17:48
Rich
14.3k11764
answered Nov 25 at 17:48
Rich
14.3k11764
answered Nov 25 at 17:48
Rich
14.3k11764
answered Nov 25 at 17:48
Rich
14.3k11764
14.3k11764
add a comment |
add a comment |
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