How to set part of a path dynamically for alias command in bashrc file
I'm trying to have a alias command and the part of its path keeps changing.
Eg:
/var/mywork/swag/wsnew/
/var/mywork/swag/ws/
/var/mywork/swag/wsold/
and my alias command to achieve is something link this
alias cws='cd /var/mywork/swag//
since last directory in the path is keep changing. I wanted to get automatically update in alias command. Is there anyway ?
I tried something like
alias cws='cd /var/mywork/swag/getenv("WSP")/
so whenever I set WSP to required path it automatically takes. But it didn't help.
bash shell
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
add a comment |
I'm trying to have a alias command and the part of its path keeps changing.
Eg:
/var/mywork/swag/wsnew/
/var/mywork/swag/ws/
/var/mywork/swag/wsold/
and my alias command to achieve is something link this
alias cws='cd /var/mywork/swag//
since last directory in the path is keep changing. I wanted to get automatically update in alias command. Is there anyway ?
I tried something like
alias cws='cd /var/mywork/swag/getenv("WSP")/
so whenever I set WSP to required path it automatically takes. But it didn't help.
bash shell
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
add a comment |
I'm trying to have a alias command and the part of its path keeps changing.
Eg:
/var/mywork/swag/wsnew/
/var/mywork/swag/ws/
/var/mywork/swag/wsold/
and my alias command to achieve is something link this
alias cws='cd /var/mywork/swag//
since last directory in the path is keep changing. I wanted to get automatically update in alias command. Is there anyway ?
I tried something like
alias cws='cd /var/mywork/swag/getenv("WSP")/
so whenever I set WSP to required path it automatically takes. But it didn't help.
bash shell
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
I'm trying to have a alias command and the part of its path keeps changing.
Eg:
/var/mywork/swag/wsnew/
/var/mywork/swag/ws/
/var/mywork/swag/wsold/
and my alias command to achieve is something link this
alias cws='cd /var/mywork/swag//
since last directory in the path is keep changing. I wanted to get automatically update in alias command. Is there anyway ?
I tried something like
alias cws='cd /var/mywork/swag/getenv("WSP")/
so whenever I set WSP to required path it automatically takes. But it didn't help.
bash shell
bash shell
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
edited Nov 15 '18 at 7:31
melpomene
59.5k54691
59.5k54691
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
asked Nov 15 '18 at 7:07
KhrusosKhrusos
275
275
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Like most problems with aliases, this is easier to solve with a shell function:
cws() {
cd /var/mywork/swag/"$WSP"
}
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
add a comment |
Like melpomene said, you are better off using a function, but if you, for whatever reason, want to stick with an alias, you can do
alias cws='cd /var/mywork/swag/$WSP'
But note that this differs from using a shell function in one point, which is related to setting a variable for just one command: If you write
WSP=aaa
...
WSP=xxx
...
WSP=yyy cws
and cws is defined as a function, this would cd to yyy, but if it is an alias, it would cd to xxx.
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
Yep. Same result with slightly different syntax, just in the possibility that variety makes it a little easier to grasp what's going on:alias cws="cd /var/mywork/swag/$WSP"Quoting the$makes it evaluate at execution time rather than once only when set, but wouldn't it be easier to have a function that could take an argument? Listen to the Muse. :)
– Paul Hodges
Nov 15 '18 at 14:33
1
Sure, a function with an argument such as${1:-${WSP:-some_nice_default}}would be more flexible, and this is what I would do in this case; if I understand the OP correctly, he doesn't intend to changeWSPoften, so his function would usually be invoked without arguments. Another option to consider would be to setCDPATH=.:/var/mywork/swagand get rid of alias and function.
– user1934428
Nov 16 '18 at 7:52
add a comment |
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2 Answers
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active
oldest
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2 Answers
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active
oldest
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active
oldest
votes
active
oldest
votes
Like most problems with aliases, this is easier to solve with a shell function:
cws() {
cd /var/mywork/swag/"$WSP"
}
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
add a comment |
Like most problems with aliases, this is easier to solve with a shell function:
cws() {
cd /var/mywork/swag/"$WSP"
}
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
add a comment |
Like most problems with aliases, this is easier to solve with a shell function:
cws() {
cd /var/mywork/swag/"$WSP"
}
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
Like most problems with aliases, this is easier to solve with a shell function:
cws() {
cd /var/mywork/swag/"$WSP"
}
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
answered Nov 15 '18 at 7:30
melpomenemelpomene
59.5k54691
59.5k54691
add a comment |
add a comment |
Like melpomene said, you are better off using a function, but if you, for whatever reason, want to stick with an alias, you can do
alias cws='cd /var/mywork/swag/$WSP'
But note that this differs from using a shell function in one point, which is related to setting a variable for just one command: If you write
WSP=aaa
...
WSP=xxx
...
WSP=yyy cws
and cws is defined as a function, this would cd to yyy, but if it is an alias, it would cd to xxx.
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
Yep. Same result with slightly different syntax, just in the possibility that variety makes it a little easier to grasp what's going on:alias cws="cd /var/mywork/swag/$WSP"Quoting the$makes it evaluate at execution time rather than once only when set, but wouldn't it be easier to have a function that could take an argument? Listen to the Muse. :)
– Paul Hodges
Nov 15 '18 at 14:33
1
Sure, a function with an argument such as${1:-${WSP:-some_nice_default}}would be more flexible, and this is what I would do in this case; if I understand the OP correctly, he doesn't intend to changeWSPoften, so his function would usually be invoked without arguments. Another option to consider would be to setCDPATH=.:/var/mywork/swagand get rid of alias and function.
– user1934428
Nov 16 '18 at 7:52
add a comment |
Like melpomene said, you are better off using a function, but if you, for whatever reason, want to stick with an alias, you can do
alias cws='cd /var/mywork/swag/$WSP'
But note that this differs from using a shell function in one point, which is related to setting a variable for just one command: If you write
WSP=aaa
...
WSP=xxx
...
WSP=yyy cws
and cws is defined as a function, this would cd to yyy, but if it is an alias, it would cd to xxx.
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
Yep. Same result with slightly different syntax, just in the possibility that variety makes it a little easier to grasp what's going on:alias cws="cd /var/mywork/swag/$WSP"Quoting the$makes it evaluate at execution time rather than once only when set, but wouldn't it be easier to have a function that could take an argument? Listen to the Muse. :)
– Paul Hodges
Nov 15 '18 at 14:33
1
Sure, a function with an argument such as${1:-${WSP:-some_nice_default}}would be more flexible, and this is what I would do in this case; if I understand the OP correctly, he doesn't intend to changeWSPoften, so his function would usually be invoked without arguments. Another option to consider would be to setCDPATH=.:/var/mywork/swagand get rid of alias and function.
– user1934428
Nov 16 '18 at 7:52
add a comment |
Like melpomene said, you are better off using a function, but if you, for whatever reason, want to stick with an alias, you can do
alias cws='cd /var/mywork/swag/$WSP'
But note that this differs from using a shell function in one point, which is related to setting a variable for just one command: If you write
WSP=aaa
...
WSP=xxx
...
WSP=yyy cws
and cws is defined as a function, this would cd to yyy, but if it is an alias, it would cd to xxx.
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
Like melpomene said, you are better off using a function, but if you, for whatever reason, want to stick with an alias, you can do
alias cws='cd /var/mywork/swag/$WSP'
But note that this differs from using a shell function in one point, which is related to setting a variable for just one command: If you write
WSP=aaa
...
WSP=xxx
...
WSP=yyy cws
and cws is defined as a function, this would cd to yyy, but if it is an alias, it would cd to xxx.
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
answered Nov 15 '18 at 7:45
user1934428user1934428
4,00721632
4,00721632
Yep. Same result with slightly different syntax, just in the possibility that variety makes it a little easier to grasp what's going on:alias cws="cd /var/mywork/swag/$WSP"Quoting the$makes it evaluate at execution time rather than once only when set, but wouldn't it be easier to have a function that could take an argument? Listen to the Muse. :)
– Paul Hodges
Nov 15 '18 at 14:33
1
Sure, a function with an argument such as${1:-${WSP:-some_nice_default}}would be more flexible, and this is what I would do in this case; if I understand the OP correctly, he doesn't intend to changeWSPoften, so his function would usually be invoked without arguments. Another option to consider would be to setCDPATH=.:/var/mywork/swagand get rid of alias and function.
– user1934428
Nov 16 '18 at 7:52
add a comment |
Yep. Same result with slightly different syntax, just in the possibility that variety makes it a little easier to grasp what's going on:alias cws="cd /var/mywork/swag/$WSP"Quoting the$makes it evaluate at execution time rather than once only when set, but wouldn't it be easier to have a function that could take an argument? Listen to the Muse. :)
– Paul Hodges
Nov 15 '18 at 14:33
1
Sure, a function with an argument such as${1:-${WSP:-some_nice_default}}would be more flexible, and this is what I would do in this case; if I understand the OP correctly, he doesn't intend to changeWSPoften, so his function would usually be invoked without arguments. Another option to consider would be to setCDPATH=.:/var/mywork/swagand get rid of alias and function.
– user1934428
Nov 16 '18 at 7:52
Yep. Same result with slightly different syntax, just in the possibility that variety makes it a little easier to grasp what's going on:
alias cws="cd /var/mywork/swag/$WSP" Quoting the $ makes it evaluate at execution time rather than once only when set, but wouldn't it be easier to have a function that could take an argument? Listen to the Muse. :)– Paul Hodges
Nov 15 '18 at 14:33
Yep. Same result with slightly different syntax, just in the possibility that variety makes it a little easier to grasp what's going on:
alias cws="cd /var/mywork/swag/$WSP" Quoting the $ makes it evaluate at execution time rather than once only when set, but wouldn't it be easier to have a function that could take an argument? Listen to the Muse. :)– Paul Hodges
Nov 15 '18 at 14:33
1
1
Sure, a function with an argument such as
${1:-${WSP:-some_nice_default}} would be more flexible, and this is what I would do in this case; if I understand the OP correctly, he doesn't intend to change WSP often, so his function would usually be invoked without arguments. Another option to consider would be to set CDPATH=.:/var/mywork/swag and get rid of alias and function.– user1934428
Nov 16 '18 at 7:52
Sure, a function with an argument such as
${1:-${WSP:-some_nice_default}} would be more flexible, and this is what I would do in this case; if I understand the OP correctly, he doesn't intend to change WSP often, so his function would usually be invoked without arguments. Another option to consider would be to set CDPATH=.:/var/mywork/swag and get rid of alias and function.– user1934428
Nov 16 '18 at 7:52
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