![\"2014-06-19_1934\"](\"https:\/\/i0.wp.com\/really.zonky.org\/wp-content\/uploads\/2014-06-19_1934.png\")
<\/a><\/p>\nThe aim here is to make the\u00a0zsh<\/em><\/a> prompt (a Unix shell) start with a green \u2713 (tick) if the previous command’s exit status was zero, and a red \u2717 (cross) if the previous command’s exit status was non-zero. A tiny thing, but both useful and fun.<\/p>\n The first thing I need is a set of variables containing terminal sequences for setting colours. Fortunately\u00a0zsh<\/em> comes with a set of suitable functions; even if they’re poorly named :-<\/p>\n The next thing is to perform a test to see if the current terminal type is worth setting a fancy prompt for. In some cases – such as when using the plain Linux console, or when things are broken enough that the terminal type isn’t set properly – it is worth avoiding setting a prompt. I do this by setting up an array containing a list of terminal types that I think it is worth setting a fancy prompt for :-<\/p>\n (Some of that list is very<\/em> historical!)<\/p>\n The test for whether to set a fancy prompt is somewhat tricky \u2026 it uses a ‘reverse subscripting’ flag in the array lookup to search the array for the string :-<\/p>\n And lastly, I actually set the prompt :-<\/p>\n Which is not exactly the easiest string to understand, but breaking it up :-<\/p>\n \nPutting it all together, I get :-<\/p>\n This is still a little bit plain compared with what some people do with their prompts, but it is right for me<\/em> (at least for now). \u2026 or a red \u2717. Incidentally, if your browser doesn’t show ticks (\u2713), crosses (\u2717), and a right pointing double arrow (\u00bb) properly, this posting may look a bit odd. As in :- The aim here is to make the\u00a0zsh prompt (a Unix shell) start with a green \u2713 (tick) if the previous command’s exit […]<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false,"_share_on_mastodon":"0"},"categories":[4,226],"tags":[1214,1213,1212],"class_list":["post-3382","post","type-post","status-publish","format-standard","hentry","category-it","category-working-notes","tag-configuration","tag-prompt","tag-zsh","category-4-id","category-226-id","post-seq-1","post-parity-odd","meta-position-corners","fix"],"share_on_mastodon":{"url":"","error":""},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p1f2KI-Sy","_links":{"self":[{"href":"https:\/\/really.zonky.org\/index.php?rest_route=\/wp\/v2\/posts\/3382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/really.zonky.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/really.zonky.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/really.zonky.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/really.zonky.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3382"}],"version-history":[{"count":7,"href":"https:\/\/really.zonky.org\/index.php?rest_route=\/wp\/v2\/posts\/3382\/revisions"}],"predecessor-version":[{"id":3390,"href":"https:\/\/really.zonky.org\/index.php?rest_route=\/wp\/v2\/posts\/3382\/revisions\/3390"}],"wp:attachment":[{"href":"https:\/\/really.zonky.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/really.zonky.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/really.zonky.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\r\nautoload -U colors && colors\r\n<\/pre>\n
\r\nfancyterms=()\r\nfancyterms=(xterm xterms dtterm iris-ansi xterm-256color)\r\n<\/pre>\n
\r\nif [[ ${fancyterms[(r)$TERM]} == \"$TERM\" ]] \r\nthen\r\n echo Fancy prompt\r\nelse\r\n echo Plain prompt\r\nfi\r\n<\/pre>\n\r\nexport PROMPT=\"%(?.%{$fg[green]%}\u2713 %{$reset_color%}.%{$fg[red]%}\u2717 %{$reset_color%})%B%n@%m\u00bb%b \"\r\n<\/pre>\n\n
\r\n# Now the prompt\r\nautoload -U colors && colors\r\n# Enable colour variables (used in prompt)\r\nfancyterms=()\r\nfancyterms=(xterm xterms dtterm iris-ansi xterm-256color)\r\n# An array of 'fancy' terminal types that we do more for \u2026 as in a funky PROMPT.\r\n\r\nif [[ ${fancyterms[(r)$TERM]} == \"$TERM\" ]] \r\nthen\r\n precmd () { print -Pn '\\e]2;%n@%m - %~^G' }\r\n # Put the hostname in the Window title\/Tab title\r\n export PROMPT=\"%(?.%{$fg[green]%}\u2713 %{$reset_color%}.%{$fg[red]%}\u2717 %{$reset_color%})%B%n@%m\u00bb%b \"\r\n # And set a really fancy prompt.\r\nelse\r\n # If we don't recognise the terminal type, don't attempt to be quite so ambitious\r\n # with the prompt.\r\n export PROMPT=$'%B%n@%m - %~\\n%#%b '\r\nfi\r\n<\/pre>\n
\n <\/p>\n","protected":false},"excerpt":{"rendered":"