I'd like to do something like this:
(cd "$1" && pwd && many && other && commands) < echo "../path"
Which should take the arguments provided and pass them to the subshell. The subshell should then execute.
The important part is that passed arguments are at the end of command line to allow for easy altering because the cursor is at the end of command when user presses the Up arrow.
A bash subshell will inherit the variables of the parent shell (but it will not modify them!).
A simple way is to define you series of command with variables that you define and modify them in the parent shell.
MyTempVar="FirstPath"
(cd "$MyTempVar" && pwd && many && other && commands) && unset MyTempVar
MyTempVar="NewPath"
!-2
!-2, if history options are enabled, you will execute the second last command of your history. It is an expansion of the built-in history of bash. histverify with shopt -s histverify to have a visual confirmation before that the command from the history is processed. unset MyTempVar you can optionally unset the variable MyTempVar if you want.You can even create a function or a script and pass the variables to them. E.g.
TTT(){ (A="$1"; cd "$A" && pwd ;) }
then call
TTT MyPath
$1..$n inside the function. And you need not to use a subshell too. You can do a script and put it executable (chmod u+x myscript.sh) somewhere in your path ($PATH). When you need to modify the variable in the parent shell you can source it, else you can execute it.
AAA(){ echo $1 && pwd } ; AAA foo the shell enters to "input mode". But with AAA(){ ( echo $1 && pwd ) } ; AAA foo it doesn't. I find that strange.
;. In this wayAAA(){ cd $1 && pwd ; } it is ok. Instead BBB(){ cd $1 && pwd } will wait for something. If you add } and press enter, when you reload the last command (with the Up key) you will find BBB(){ cd $1 ; pwd }; }. Now the first } is taken as parameter of pwd that gives you no error. Try with CCC(){ cd $1 ; echo } then, when asked, with another }. After execute it (CCC mydir) and it will change directory and print the character }.
(cd "$A" && pwd && many && other && commands),A="NewPath"then!-2or 2 times Up arrow and enter...Ato the old path? Give it a look to the answer below and let me know. Else you can pass parameter to a bash invocation with the option-c.CTRL+Awill put the cursor at the beginning of the line you just recalled with theUparrow. There are a lot of keyboard shortcuts for each terminal;-)