Enable 24bit color support for Emacs in Terminal

bin/emacsclient-wrapper

@@ -6,7 +6,7 @@ ALTERNATE_EDITOR="nano"
 
 # Set to binary bundled in Emacs.app if it exists
 if [ -f "/Applications/Emacs.app/Contents/MacOS/bin/emacsclient" ]; then
-  EMACSCLIENT="/Applications/Emacs.app/Contents/MacOS/bin/emacsclient"
+  EMACSCLIENT="env TERM=screen-24bit /Applications/Emacs.app/Contents/MacOS/bin/emacsclient"
 fi
 
 # Execute emacsclient

playbooks/macos_terminfo.yml

@@ -0,0 +1,31 @@
+---
+- hosts: localhost
+  tasks:
+    - name: Ensure ~/.terminfo directory exists
+      file:
+        path: "{{ ansible_facts.env.HOME }}/.terminfo"
+        state: directory
+    - name: Create temporary file to store terminfo source
+      tempfile:
+      register: tempfile
+    - name: Populate temporary file with terminfo source
+      copy:
+        dest: "{{ tempfile.path }}"
+        content: |
+          # From [[info:efaq#Colors%20on%20a%20TTY][Colors on a TTY]]
+          # Use colon separators.
+          screen-24bit|screen with 24-bit direct color mode,
+            use=screen-256color,
+            setb24=\E[48:2:%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%dm,
+            setf24=\E[38:2:%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%dm,
+          # Use semicolon separators.
+          screen-24bits|screen with 24-bit direct color mode,
+            use=screen-256color,
+            setb24=\E[48;2;%p1%{65536}%/%d;%p1%{256}%/%{255}%&%d;%p1%{255}%&%dm,
+            setf24=\E[38;2;%p1%{65536}%/%d;%p1%{256}%/%{255}%&%d;%p1%{255}%&%dm,
+    - name: Compile terminfo with system tic
+      command: tic -x {{ tempfile.path }}
+    - name: Remove temporary file
+      file:
+        state: absent
+        path: "{{ tempfile.path }}"

terminfo/screen-24bit.terminfo

@@ -0,0 +1,11 @@
+# From [[info:efaq#Colors%20on%20a%20TTY][Colors on a TTY]]
+# Use colon separators.
+screen-24bit|screen with 24-bit direct color mode,
+  use=screen-256color,
+  setb24=\E[48:2:%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%dm,
+  setf24=\E[38:2:%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%dm,
+# Use semicolon separators.
+screen-24bits|screen with 24-bit direct color mode,
+  use=screen-256color,
+  setb24=\E[48;2;%p1%{65536}%/%d;%p1%{256}%/%{255}%&%d;%p1%{255}%&%dm,
+  setf24=\E[38;2;%p1%{65536}%/%d;%p1%{256}%/%{255}%&%d;%p1%{255}%&%dm,

tmux.conf

@@ -5,6 +5,7 @@ bind C-q send-prefix
 
 # Settings
 set -g default-terminal "screen-256color"
+set -ga terminal-overrides ",*256col*:Tc"
 set -g detach-on-destroy on
 set -g history-limit 50000
 set -g display-time 3000

zsh/emacs.zsh

@@ -4,11 +4,11 @@
 
 # OS X systems.
 if [ -f "/Applications/Emacs.app/Contents/MacOS/Emacs" ]; then
-  alias emacs="/Applications/Emacs.app/Contents/MacOS/Emacs -nw"
+  alias emacs="env TERM=screen-24bit /Applications/Emacs.app/Contents/MacOS/Emacs -nw"
 fi
 
 if [ -f "/Applications/Emacs.app/Contents/MacOS/bin/emacsclient" ]; then
-  alias emacsclient="/Applications/Emacs.app/Contents/MacOS/bin/emacsclient"
+  alias emacsclient="env TERM=screen-24bit /Applications/Emacs.app/Contents/MacOS/bin/emacsclient"
 fi
 
 # *nix systems.