From 581c7d07e482585054c960725eff4f0a20c62a7d Mon Sep 17 00:00:00 2001
From: Fernando Schauenburg <dev@schauenburg.me>
Date: Wed, 12 Jul 2023 19:52:39 +0200
Subject: [PATCH] git: add git-delta as diff pager

---
 bin/delta-wrapper |  7 +++++++
 config/git/config | 27 ++++++++++++++++++++++++++-
 debian.sh         | 18 ++++++++++++++++++
 3 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100755 bin/delta-wrapper

diff --git a/bin/delta-wrapper b/bin/delta-wrapper
new file mode 100755
index 0000000..c875471
--- /dev/null
+++ b/bin/delta-wrapper
@@ -0,0 +1,7 @@
+#!/bin/sh
+# This wrapper is intended to be used as pager for git:
+#  - Use `git-delta` if installed.
+#  - Otherwise, fall back to `less`.
+command -v delta >/dev/null 2>&1 && exec delta --true-color=always "$@"
+exec less -F -X "$@"
+
diff --git a/config/git/config b/config/git/config
index 035fba6..8a8aeeb 100644
--- a/config/git/config
+++ b/config/git/config
@@ -22,7 +22,7 @@
 [core]
     excludesfile    = ~/.config/git/ignore
     trustctime      = false # http://www.git-tower.com/blog/make-git-rebase-safe-on-osx/
-    pager           = less -F -X
+    pager           = delta-wrapper
 
 [init]
     defaultBranch = main
@@ -30,14 +30,39 @@
 [log]
     date = human
 
+[delta]
+    navigate = true     # use n and N to navigate diff secitons
+
+    commit-decoration-style = "#b58900" box
+    commit-style = raw
+    dark = true
+    file-decoration-style = "#268bd2" box ul
+    file-style = "#268bd2"
+    hunk-header-style = omit
+    line-numbers = true
+    line-numbers-minus-style = "#dc322f" italic
+    line-numbers-plus-style = "#719e07" italic
+    line-numbers-left-style =  "#586e75"
+    line-numbers-right-style = "#eee8d5"
+    line-numbers-zero-style =  "#073642"
+    minus-emph-style = normal "#842b2c"
+    minus-style = normal "#2c2429"
+    plus-emph-style = syntax "#446c14"
+    plus-style = syntax "#173921"
+    syntax-theme = Nord
+
 [push]
     default = upstream
 
 [pull]
     ff = only
 
+[diff]
+    colorMoved = default
+
 [merge]
     tool = vimdiff
+    conflictstyle = diff3
 
 [mergetool]
     prompt = false
diff --git a/debian.sh b/debian.sh
index 17c6cfb..4b2cd9c 100755
--- a/debian.sh
+++ b/debian.sh
@@ -4,6 +4,7 @@ set -e
 USERNAME=fernando
 DOTFILES_URL="https://github.com/fschauen/dotfiles.git"
 NEOVIM_VERSION="0.9.1"
+GIT_DELTA_VERSION="0.16.5"
 
 if [ -t 1 ]; then
   sgr0="$(printf      '\033[0m')"
@@ -113,6 +114,20 @@ install_neovim() {
   fi
 }
 
+install_git_delta() {
+  delta_url="https://github.com/dandavison/delta/releases/download/${GIT_DELTA_VERSION}/git-delta-musl_${GIT_DELTA_VERSION}_amd64.deb"
+  delta_deb="git-delta-musl_${GIT_DELTA_VERSION}_amd64.deb"
+  delta_bin="/usr/bin/delta"
+
+  if [ ! -f "${delta_bin}" ]; then
+    [ ! -f "${delta_deb}" ] && $cmd curl -L -o "${delta_deb}" "${delta_url}"
+    $cmd dpkg -i "${delta_deb}"
+    $cmd rm -vf "${delta_deb}"
+  else
+    echo "${yellow}SKIPPED:${sgr0} ${delta_bin} exists"
+  fi
+}
+
 setup_user() {
   # Change shell to `zsh` and get rid of bash files.
   $cmd chsh -s /bin/zsh "$USERNAME"
@@ -149,6 +164,9 @@ execute() {
   heading "Install neovim v$NEOVIM_VERSION"
   install_neovim    # Must come after filesystem tweaks because of man pages.
 
+  heading "Install git-delta v$GIT_DELTA_VERSION"
+  install_git_delta
+
   heading "Setup user: $USERNAME"
   setup_user