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Shell Mode Options
If the variable `comint-scroll-to-bottom-on-input' is non-`nil',
insertion and yank commands scroll the selected window the bottom
If `comint-scroll-show-maximum-output' is non-`nil' (which is the
default), then scrolling due to arrival of output tries to place the
last line of text at the bottom line of the window, so as to show as
much useful text as possible. (This mimics the scrolling behavior of
By setting `comint-scroll-to-bottom-on-output', you can opt for
having point jump to the end of the buffer whenever output arrives--no
matter where in the buffer point was before. If the value is `this',
point jumps in the selected window. If the value is `all', point jumps
in each window that shows the comint buffer. If the value is `other',
point jumps in all nonselected windows that show the current buffer.
The default value is `nil', which means point does not jump to the end.
The variable `comint-input-ignoredups' controls whether successive
identical inputs are stored in the input history. A non-`nil' value
means to omit an input that is the same as the previous input. The
default is `nil', which means to store each input even if it is equal
to the previous input.
Three variables customize filename completion
`comint-completion-addsuffix' controls whether completion inserts a
space or a slash to indicate a fully completed file or directory name
(non-`nil' means do insert a space or slash).
`comint-completion-recexact', if non-`nil', directs TAB to choose the
shortest possible completion if the usual Emacs completion algorithm
cannot add even a single character. `comint-completion-autolist', if
non-`nil', says to list all the possible completions whenever
completion is not exact.
Shell mode can optionally expand history references in the buffer
when you send them to the shell. To request this, set the variable
`comint-input-autoexpand' to `input'.
You can make SPC perform history expansion by binding SPC to the
The command `comint-dynamic-complete-variable' does variable name
completion using the environment variables as set within Emacs. The
variables controlling filename completion apply to variable name
completion too. This command is normally available through the menu
Command completion normally considers only executable files. If you
set `shell-command-execonly' to `nil', it considers nonexecutable files
In a new Shell mode buffer, the input history is initialized from the
file name specified in the variable `shell-input-ring-file-name'. By
default, this is `"~/.history"'.
You can now configure the behavior of `pushd'. Variables control
whether `pushd' behaves like `cd' if no argument is given
(`shell-pushd-tohome'), pop rather than rotate with a numeric argument
(`shell-pushd-dextract'), and only add directories to the directory
stack if they are not already on it (`shell-pushd-dunique'). The
values you choose should match the underlying shell, of course.
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