vim using gf option with env variable - vim

I often use gf in vim to open files. Often these file paths use environment variables.
I am using tcl shell to launch some scripts. When the environment variable is used without ::env (option which is necessary for env for tcl), vim has no trouble understanding it. But when it does contain, vim is unable to use the environment variable value.
This works for gf:
$hello/bla.tcl
This does NOT work for gf:
$::env(hello)/bla.tcl

If there are spaces before and after the file name, you can do with
viWgf

Related

Fail to set Homebrew formula editor to vim in fish shell

I have a problem with Homebrew editor: Atom is used instead of Vim
$ brew edit a_brew_formula
Editing /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/a_brew_formula.rb
Warning: Using atom because no editor was set in the environment.
This may change in the future, so we recommend setting EDITOR,
or HOMEBREW_EDITOR to your preferred text editor.
EDITOR and HOMEBREW_EDITOR are well set in config.fish:
set EDITOR vim
set HOMEBREW_EDITOR vim
I checked in the shell:
$ echo $EDITOR
vim
Why my editor choice is not taken into account?
You haven't exported the variable, so external processes (like homebrew) don't see it.
Use set -x, but preferably set -gx to also define global scope on the variable.
E.g.
set -gx EDITOR vim
To see what an external process sees, you can use env. If called without arguments, it will print its environment as VAR=VALUE lines.
If that doesn't show EDITOR=, you know that you've not exported your $EDITOR.

Android Studio - cmake - access environement variable?

This question is specific to using cmake as part of Android Studio build process.
I'm using Android Studio 2.2 preview 7 on linux (ubuntu)
Inside the CMakeLists.txt I am able to access the Android NDK path using: ${ANDROID_NDK}
But how can I access:
Any environment variable ?
If not possible, at least the Android SDK path ?
I already tried to used $ENV{name_of_the_environment_variable_here} but it's always empty, even if the environment variable exist. I guess that when gradle invoke cmake it "hide" the env var somehow.
I don't think you can use $ENV, it's just an example of a variable because they're environment variables. However, you should be able to type env and hit enter for a list of the variables you currently have set. Then, the ones you see in the list, you can invoke by typing $VARIABLE_NAME, using a command before them to get them to do something. E.g. echo $VARIABLE will echo your variable to stdout.
I'm not sure how $ANDROID_SDK was set, if it was part of an install process, etc. but generally you would set user environment variables in .profile, .bash_profile or .bashrc configuration files. These files are read by the shell in that order. System-wide variables are set in /etc/environment, /etc/profile, and /etc/bash.bashrc, but you probably don't want to mess with those (most distros encourage making ancillary additions in /etc/profile.local, but that's a story for another answer).
It doesn't particularly matter which one of these files you use, unless what you're trying to do interacts with the order in which they are loaded. Generally, I look for where the variables have been set by either the OS or other stuff I've added and put them near those. You can find where environment variables are set by typing:
% for i in .profile .bash_profile .bashrc; do grep -H PATH $HOME/$i; done
(% is the prompt, don't type %)
.. and this will loop through the 3 files and show you if a user $PATH is set in any of them.
Bash uses the export ENV command as opposed to set ENV, which is from the original sh, which AFAIK is only default on FreeBSD and derivatives like pfSense anymore. Almost all other OS use Bash by default, except MacOS which recently moved to zsh and also uses export, and OpenBSD which uses ksh (nobody uses OpenBSD).
If you want to verify which shell you are using, type echo $SHELL, or echo $0 and hit enter, and it should let you know.
You can add the environment variable ephemerally by typing this command in your bash terminal and pressing enter:
% export ANDROID_SDK_ROOT=/home/username/AndroidSDK
To be clear, this is an example path, so it'd be best to use the actual path in which your android SDK files reside. However, this example was a default install location Android Studio tried to use when I installed it recently, so if you're not sure where they are, it's probably a good place to check.
To have a more permanent setting of your environment variable, open a text editor and add the line above to one of the configuration files I mentioned in the first paragraph (they'll be in your $HOME folder). Or, you can run this from the prompt and it'll add it to your file automatically:
% echo 'export ANDROID_SDK_ROOT=/home/username/AndroidSDK' >> $HOME/.bashrc
Take care to use two angle brackets and not one, as one angle bracket will overwrite the entire file with the single line.
How can I access Any environment variable ?
If you're not sure which folder is $HOME, try typing cd $HOME and hitting enter - that'll take you there. That's how you access environment variables - use a command with the invocation of the variable and it should act as if you had typed out the entire thing.
To access environment variables, type echo $NAME_OF_VARIABLE and it should echo it to the screen. If you want to search your three config files I mentioned in the beginning for where an environment variable is set, you can use grep as I did earlier, just changing the search string for whatever you're looking for. E.g. (while in $HOME):
% grep SDK_ROOT .bashrc .profile .bash_profile
Or you can type env to list all the currently set variables and filter them by piping the output to the grep command:
% env | grep SDK
If you want to just list all of the set variables and root around the entire thing, just type env instead of piping it to grep (grep's a filter).
Lastly, I'll give you an example of my $ANDROID_SDK_ROOT $ANDROID_SDK and $SDK_ROOT variables in my .bashrc - I noticed while installing these tools, they use all three (isn't that fun?):
% grep ANDROID .bashrc
export ANDROID_SDK=$HOME/development/Android/SDK
export ANDROID_SDK_ROOT=$HOME/development/Android/SDK
export PATH=$PATH:$ANDROID_SDK:$JAVA_HOME:$ANDROID_SDK/cmdline-tools/latest/bin:$ANDROID_SDK/build-tools/32.0.0:$ANDROID_SDK/emulator:$ANDROID_SDK/emulator/bin64:$ANDROID_SDK/tools:$ANDROID_SDK/tools/bin:$ANDROID_SDK/extras:$ANDROID_SDK/platform-tools:$HOME/development/AndroidStudio/bin
export ANDROID_STUDIO=$HOME/development/AndroidStudio
% grep SDK_ROOT .bashrc
export SDK_ROOT=$HOME/development/Android/SDK
export ANDROID_SDK_ROOT=$HOME/development/Android/SDK
Hope that answers some questions, sorry it took so long to give you a response.

Modify PATH internally from with gvim?

I have quite a few tools expected to be used togather with gvim on Windows. Usually the env variable PATH should be set for each tool respectively. Is it possible to make the modified PATH variable privately visible to gvim itself rather than system-widely visible to all programs?
BR,Ruochen
You can modify the PATH directly inside Vim (or your ~/.vimrc); it will then used for any external command started from it (i.e. :! and :call system()).
:let $PATH .= ':/tmp'
If you want gvim to run with a modified PATH, set it on the way in.
Instead of just running gvim, run:
PATH=/usr/bin:/usr/local/bin:$HOME/bin:/bin gvim
This assumes you are running a bourne family shell. (not tcsh or csh)

Running gvim from MSYS --- how to avoid/change MSYS enviroment variables?

When I run gvim from MSYS, things go wrong during initialization. Namely, gvim can't find the initialization files that are in 'C:\Documents and Settings\username\vimfiles.
[Specifically, gvim reports the error E117: Unknown function: pathogen#infect during initialization, so it never found autoload\pathogen.vim. Doing :scriptnames also confirms that none of the setup files from vimfiles\ are run.]
I think I've debugged why it goes wrong. When you start MSYS, the MSYS shell inherits the windows enviroment variables, but changes some of them to it's custom values. C:\Documents and Settings\username is the value of $HOME in Windows, but MSYS sets it to something like C:/msys/user name. And of course, Vim uses $HOME to find the right initialization files.
I also notice set shell? has changed to something like shell=C:/msys/bin/sh instead of shell=C:\WINDOWS\system32\cmd.exe, but I hope this isn't important for fixing the initialization problem.
I need to run gvim with the normal windows environment variables. At least I need to be able to manually override a few important ones like $HOME to something I specify (i.e., I'm not concerned about my windows $HOME changing, so it's fine to use a static value).
I tried to reset $HOME manually in my vimrc, but by then it is too late.
Is there some trick to specifying $HOME early on during initialization, or as an extra command line parameter?
Alternatively, is there some trick with running commands from msys differently? I know almost nothing about how the shell C:/msys/bin/sh works, but I could conceive of some extra arguments that changes the visibile environment for the command (e.g. gvim.exe) you are typing.
---Edit---
Reposting the solution that worked (it achieves the later idea):
Instead of running gvim.exe, run the command HOME="C:\Documents and Settings\username" gvim.exe
In bash and other UNIX shells, you can do:
$ HOME='/path/to/dir' gvim
to temporarily set $HOME to a different value.
I admit I'm not familiar at all with the Windows command line, but it might be worth a try.
I believe you can define $HOME just like any other environment variable.
Try adding this to the start of your .vimrc.
let $HOME="C:\Documents and Settings\username"
I had a similar issue when running Cygwin (which is similar to MSYS).
The easiest solution for me was to simply set the HOME environment variable to an empty string. Otherwise, the Cygwin HOME value would be appended to the Windows USERPROFILE in GVim and it would fail to start correctly. Not explicitly setting the full path of the HOME means that I can use the same start-up files on different systems where the USERNAME may not be the same.
Likewise, the SHELL environment variable should not be inherited from Cygwin Bash. This results in errors when running shell or external programs via !. Again, I set this to be an empty variable since Vim is smart enough to figure out what it should be.
In my .bashrc, I set the following alias for running Windows gvim which starts GVim with the HOME and SHELL variables set to an empty string – just for that command.
gvim="/cygdrive/c/Program Files (x86)/Vim/vim74/gvim"
if [ -x "$gvim" ]; then
alias gvim="HOME= SHELL= \"$gvim\""
fi
unset gvim
I achieved this by making a windows symbol link (Win 7 or higher).
Via a symbol link, you can even make vim and gvim to use the same configuration and plugin.

Why doesn't my vim know my alias?

I have used "alias ruby=ruby1.9.1", so I can execute my ruby with this:
ruby 123.rb
or
ruby1.9.1 123.rb
But in my vim, I use :!ruby and get
/bin/bash: ruby: command not found.
I must use :!ruby1.9.1
How does alias work? Why vim doesn't know it?
When Vim starts a process it makes a system call. It has only inherited the environment variables from your shell if you started it from the shell. But it won't know your bash aliases.
Bash aliases are only a convenience when you enter a command line in the Bash shell. They are expanded by Bash only.
If you want real aliases put symlinks in a private hidden folder, and add that folder to your PATH, or use the alternatives facility.
You can try
:set shellcmdflag+=i
to call bass as "interactive" although that does give an annoying message for every shell command executed.
Aliases (unlike environment variables) are not inherited by subshells. So if you want an alias always available, you need to set it in your .bashrc file, so every instance of the shell will get it on startup

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