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52 lines
1.1 KiB
Markdown
52 lines
1.1 KiB
Markdown
# Set Session-Specific Environment Variables
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`tmux` allows you to manage separate environments for separate projects. For me
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this usually boils down to arrangements of windows and tabs with different
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servers running.
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`tmux` can also provide session-specific environment variables. For anything
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that you use environment variables for.
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As an example, let's say I have one project that I always edit with VS Code.
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And another that uses `vim`.
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My default editor, as configured in my `~/.zshrc` file is `nvim`.
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```bash
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❯ echo $EDITOR
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nvim
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```
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If I jump into the first project (`one`), I can set the `EDITOR` to `code` like
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so.
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```bash
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❯ tmux setenv EDITOR code
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```
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It won't apply to the current pane, but if I open a new one.
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```
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❯ echo $EDITOR
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code
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```
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I can then jump to the other project (`two`) to set that one to `vim`. This
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time using the tmux command prompt.
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```bash
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<tmux-prefix>:
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:setenv EDITOR vim
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```
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Again, if I open a new pane, the editor will be set.
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```
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❯ echo $EDITOR
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vim
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```
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All the while, the value of `EDITOR` is preserved as `nvim` for everything
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outside the context of those two tmux sessions.
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