feat(fish/envsource): filter out empty lines and vars that don't comply with the standard VAR=VALUE format

fish/conf.d/aliases.fish

@@ -1,7 +1,7 @@
 alias ls 'exa -alh'
 alias g 'git'
 alias copy 'xclip -selection clipboard'
-alias cat 'bat'
+alias cat 'bat --theme Catppuccin-frappe'
 alias k 'kubectl'
 alias rm 'trash'
 alias future-commit 'git commit --date (echo (date -d +7hours))' 

fish/conf.d/envsource.fish

@@ -1,5 +1,11 @@
 function envsource
-  for line in (cat $argv | grep -v '^#')
+  if not set -q argv[1]
+    set argv[1] ".env"
+  end
+
+  echo "Using $argv[1] as input file"
+
+  for line in (grep -v '^\s*\(#\|$\)' $argv[1] | grep -E '^[A-Za-z_]+=[^#\n]+')
     set item (string split -m 1 '=' $line)
     set -gx $item[1] $item[2]
     echo "Exported key $item[1]"