chore: bumps min fish version to 3, remove use of IFS (#952)

This removes the use of IFS which has been deprecated and will be removed in future versions of Fish as per [this comment](https://github.com/oh-my-fish/oh-my-fish/issues/947#issuecomment-2483386219). I replaced the few uses of it by `read --delimiter`. This also bumps the minimum Fish version to 3.0.0.

bin/install

@@ -474,7 +474,7 @@ function sane_environment_check
     abort (which awk)" does not look like an AWK interpreter."
   end
 
-  assert_fish_version_compatible 2.2.0
+  assert_fish_version_compatible 3.0.0
   assert_git_version_compatible 1.9.5
 
   debug "Verifying Git implementation is not buggy Git for Windows"

bin/install.sha256

@@ -1 +1 @@
-429a76e5b5e692c921aa03456a41258b614374426f959535167222a28b676201  install
+ca00e1e7fb3c251d55917d1f0a0f31c3816b9771c3e5e16acdbde80f4f81a997  install

lib/autoload.fish

@@ -18,8 +18,7 @@ function __autoload_insert
   set -l complete_path
   for path in $argv
     not test -d "$path"; and continue
-    set -l IFS '/'
-    echo $path | read -la components
+    echo $path | read --delimiter '/' -la components
     if test "x$components[-1]" = xcompletions
       contains -- $path $fish_complete_path
         or set complete_path $complete_path $path
@@ -38,8 +37,7 @@ function __autoload_erase
   set -l function_indexes
   set -l complete_indexes
   for path in $argv
-    set -l IFS '/'
-    echo $path | read -la components
+    echo $path | read --delimiter '/' -la components
     test "x$components[-1]" = xcompletions
       and set complete_indexes $complete_indexes (contains -i $path $fish_complete_path)
       or  set function_indexes $function_indexes (contains -i $path $fish_function_path)

lib/require.fish

@@ -47,8 +47,7 @@ function require
 
   for init in $init_path
     emit perf:timer:start $init
-    set -l IFS '/'
-    echo $init | read -la components
+    echo $init | read --delimiter '/' -la components
 
     set path (printf '/%s' $components[1..-2])
 
@@ -62,8 +61,7 @@ function require
       set dependencies
 
       if test -f $bundle
-        set -l IFS ' '
-        while read -l type dependency
+        while read --delimiter ' ' -l type dependency
           test "$type" != package
             and continue
           require "$dependency"

pkg/omf/functions/cli/omf.cli.help.fish

@@ -1,5 +1,4 @@
 function omf.cli.help
-  set -l IFS ''
   set -l doc_root $OMF_PATH/docs/cli
   set -l doc $doc_root/omf.adoc
 

pkg/omf/functions/core/omf.doctor.fish

@@ -13,11 +13,10 @@ function __omf.doctor.theme
 end
 
 function __omf.doctor.fish_version
-  set -l min_version 2.2.0
+  set -l min_version 3.0.0
   set -l current_version
   begin
-    set -l IFS '-'
-    echo $FISH_VERSION | read -la version_parts
+    echo $FISH_VERSION | read -la --delimiter - version_parts
     set current_version "$version_parts[1]"
   end
 

pkg/omf/functions/index/omf.index.query.fish

@@ -13,11 +13,9 @@ function omf.index.query -d 'Query packages in the index'
       case '--type=theme'
         set q_type theme
       case '--name=*'
-        set -l IFS '='
-        echo "$arg" | read dummy q_name
+        echo "$arg" | read --delimiter = dummy q_name
       case '--text=*'
-        set -l IFS '='
-        echo "$arg" | read dummy q_text
+        echo "$arg" | read --delimiter = dummy q_text
       case '*'
         echo "Invalid search term: '$arg'" >&2
         return 1