feat(shell): nvim-alt.bash VIMRC [DIR] [NVIM ARGS]

Start nvim with an alternative configuration and runtime data directory

Signed-off-by: hsv2 <soratobuneko@disroot.org>

README.md

@@ -1,16 +1,10 @@
-# Give Up GitHub
+# Random scripts
 
-This project has given up GitHub.
-([See Software Freedom Conservancy's *Give Up  GitHub* site for details](https://GiveUpGitHub.org).)
+## Weechat
 
-You can now find this project at
-[disroot](https://git.disroot.org/soratobuneko/weechat-scripts) or
-[codeberg](https://codeberg.org/hsv2/weechat-scripts) instead.
+- [urltitel](weechat/urltitel.py): a shitty script to autosend web page title of
+  URLs.
 
-Any use of this project's code by GitHub Copilot, past or present, is done
-without our permission.  We do not consent to GitHub's use of this project's
-code in Copilot.
+## Shell
 
-Join us; you can [give up GitHub](https://GiveUpGitHub.org) too!
-
-![Logo of the GiveUpGitHub campaign](https://sfconservancy.org/img/GiveUpGitHub.png)
+- [nvim-alt](shell/nvim-alt.bash): run nvim with an alternative configuration.

shell/nvim-alt.bash

@@ -0,0 +1,52 @@
+#!/bin/bash
+# vi: et sw=4 ts=4:
+
+if [[ -z "$(LC_ALL=C type -t realpath)" ]]
+then
+    realpath() (
+    OURPWD=$PWD
+    cd "$(dirname "$1")"
+    LINK=$(readlink "$(basename "$1")")
+    while [ "$LINK" ]; do
+        cd "$(dirname "$LINK")"
+        LINK=$(readlink "$(basename "$1")")
+    done
+    REALPATH="$PWD/$(basename "$1")"
+    cd "$OURPWD"
+    echo "$REALPATH"
+)
+fi
+
+if [[ $TERMUX_VERSION ]];
+then
+    TMPDIR="$TMUX_TMPDIR"
+else
+    TMPDIR="${TMPDIR:-/tmp}"
+fi
+
+if [[ ! -f "$(realpath $1)" ]]
+then
+    echo "Invalid argument"
+    echo "syntax: $0 VIMRC [DIR] [NVIM ARGS]"
+    echo "VIMRC is the configuration file to use"
+    echo "DIR is where runtime and configuration will be stored."
+    echo "if not specified a temporary one will be used."
+fi
+
+if [[ -z "$2" ]]
+then
+    NVIM_DIR="$(mktemp --directory hsv2.nvim-test.XXXXXXXX)"
+else
+    if [[ ! -d "$(realpath $2)" ]]
+    then
+        mkdir "$2"
+    fi
+    NVIM_DIR="$2"
+fi
+
+export XDG_DATA_HOME="$NVIM_DIR/data"
+export XDG_CONFIG_HOME="$NVIM_DIR/conf"
+export MYVIMRC="$1"
+
+echo data stored in $NVIM_DIR
+nvim -u "$MYVIMRC" ${@:3}