Improve git config for diff-so-fancy

scripts/git-config.sh

@@ -6,18 +6,44 @@ ORIGIN=origin
 UPSTREAM=$ORIGIN
 MASTER=$UPSTREAM/master
 
-if [[ $# > 0 && "$1" == "-dry" ]]; then
+if [[ $# -gt 0 && "$1" == "-dry" ]]; then
   DRY=true
 else
   DRY=false
 fi
 
 function git_alias() {
-  name=$1
-  body="$2"
-  echo "git config --global alias.$name $body"
+  local name="$1"
+  local body="$2"
+  git_set "alias.$name" "$body"
+}
+
+function git_unalias() {
+  local name="$1"
+  git_unset "alias.$name"
+}
+
+function git_set() {
+  local name="$1"
+  local value="$2"
+  echo "git config --global $name $value"
   if [[ $DRY != "true" ]]; then
-    git config --global alias.$name "$body"
+    git config --global "$name" "$value"
+  fi
+}
+
+function git_unset() {
+  local name="$1"
+  echo "git config --global --unset $name"
+  if [[ $DRY != "true" ]]; then
+    git config --global --unset "$name"
+  fi
+}
+
+function git_unset_if_not_set() {
+  local name="$1"
+  if ! git config "$name"; then
+    git_unset "$name"
   fi
 }
 
@@ -77,3 +103,26 @@ git_alias shd "stash drop"
 git_alias aliases "config --get-regexp alias"
 git_alias configs "config --list"
 
+if command -v diff-so-fancy > /dev/null; then
+  git_set core.pager "diff-so-fancy | less --tabs=4 -RFX"
+  git_set interactive.diffFilter "diff-so-fancy --patch"
+
+  git_set color.ui true
+
+  git_set color.diff-highlight.oldNormal    "red bold"
+  git_set color.diff-highlight.oldHighlight "red bold 52"
+  git_set color.diff-highlight.newNormal    "green bold"
+  git_set color.diff-highlight.newHighlight "green bold 22"
+
+  git_set color.diff.meta       "11"
+  git_set color.diff.frag       "magenta bold"
+  git_set color.diff.func       "146 bold"
+  git_set color.diff.commit     "yellow bold"
+  git_set color.diff.old        "red bold"
+  git_set color.diff.new        "green bold"
+  git_set color.diff.whitespace "red reverse"
+
+else
+  git_unset core.pager
+  git_unset interactive.diffFilter
+fi