Allow for copy instead of linking (#401)

* Allow for optional copy on install instead of linking

* Remove eval in favor of proper test call

* Document fisher_copy variable

* Missing ?

README.md

@@ -152,6 +152,16 @@ set fish_function_path $fish_path/functions $fish_function_path
 set fish_complete_path $fish_path/completions $fish_complete_path
 ```
 
+### How do I have fisherman copy plugin files instead of linking?
+
+By default, fisherman will create symlinks to plugin files.
+
+To have fisherman copy files:
+
+```fish
+set -U fisher_copy true
+```
+
 ### What is a fishfile and how do I use it?
 
 The fishfile lists what you've installed, and it's automatically updated as you install / remove plugins.

fisher.fish

@@ -116,6 +116,10 @@ function $fisher_cmd_name -d "fish plugin manager"
         set -g fisher_file "$fish_path/fishfile"
     end
 
+    if test -z "$fisher_copy"
+        set -g fisher_copy false
+    end
+
     switch "$argv[1]"
         case --complete
             __fisher_complete
@@ -800,7 +804,11 @@ function __fisher_plugin_enable -a path
             command mv -f "$target" "$backup_target" ^ /dev/null
         end
 
-        command ln -sf "$file" "$target"
+        if test $fisher_copy = true
+            command cp -Rf "$file" "$target"
+        else
+            command ln -sf "$file" "$target"
+        end
 
         builtin source "$target" ^ /dev/null
 
@@ -815,19 +823,31 @@ function __fisher_plugin_enable -a path
 
     for file in $path/{functions/,}*.{py,awk}
         set -l base (basename "$file")
-        command ln -sf "$file" "$fish_path/functions/$base"
+        if test $fisher_copy = true
+            command cp -Rf "$file" "$fish_path/functions/$base"
+        else
+            command ln -sf "$file" "$fish_path/functions/$base"
+        end
     end
 
     for file in $path/conf.d/*.{py,awk}
         set -l base (basename "$file")
-        command ln -sf "$file" "$fish_path/conf.d/$base"
+        if test $fisher_copy = true
+            command cp -Rf "$file" "$fish_path/conf.d/$base"
+        else
+            command ln -sf "$file" "$fish_path/conf.d/$base"
+        end
     end
 
     for file in $path/conf.d/*.fish
         set -l base (basename "$file")
         set -l target "$fish_path/conf.d/$base"
 
-        command ln -sf "$file" "$target"
+        if test $fisher_copy = true
+            command cp -Rf "$file" "$target"
+        else
+            command ln -sf "$file" "$target"
+        end
         builtin source "$target" ^ /dev/null
     end
 
@@ -835,7 +855,11 @@ function __fisher_plugin_enable -a path
         set -l base (basename "$file")
         set -l target "$fish_path/completions/$base"
 
-        command ln -sf "$file" "$target"
+        if test $fisher_copy = true
+            command cp -Rf "$file" "$target"
+        else
+            command ln -sf "$file" "$target"
+        end
         builtin source "$target" ^ /dev/null
     end