[+] Fish (#7)

fish/includes/core.fish

@@ -0,0 +1,39 @@
+set -gx LANG en_US.UTF-8
+set -gx LC_ALL en_US.UTF-8
+
+function has --description 'Return success if a command exists'
+    test (count $argv) -gt 0; and command -sq -- $argv[1]
+end
+
+function __fishrc_as_root --description 'Run a command through sudo only when not root'
+    if test (id -u) -eq 0
+        command $argv
+    else
+        sudo $argv
+    end
+end
+
+function __fishrc_prepend_path --description 'Prepend directories to PATH if they exist'
+    for dir in $argv
+        if test -d "$dir"
+            if type -q fish_add_path
+                fish_add_path -g -p "$dir"
+            else if not contains -- "$dir" $PATH
+                set -gx PATH "$dir" $PATH
+            end
+        end
+    end
+end
+
+__fishrc_prepend_path \
+    "$SCR/bin" \
+    "$HOME/.local/bin" \
+    "$HOME/.cargo/bin"
+
+if test (uname -s) = Linux; and test (uname -m) = x86_64
+    __fishrc_prepend_path "$SCR/bin/linux-x64"
+end
+
+if not contains -- . $PATH
+    set -gx PATH $PATH .
+end