Improve git config

* use functions for activation
* add support for delta

scripts/git-config.sh

@@ -46,7 +46,53 @@ function can_run() {
   command -v "$application" > /dev/null
 }
 
-git config --global core.editor vim
+function activate_delta() {
+  git_set core.pager delta
+  git_set interactive.diffFilter "delta --color-only"
+  git_set delta.navigate true
+  git_set delta.side-by-side false
+  git_set merge.conflictstyle diff3
+  git_set diff.colorMoved default
+}
+
+function activate_diff_so_fancy() {
+  git_set core.pager "diff-so-fancy | less --tabs=4 -RFX"
+  git_set interactive.diffFilter "diff-so-fancy --patch"
+}
+
+function set_colors() {
+  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"
+}
+
+function unset_colors() {
+  git_unset color.diff-highlight.oldNormal
+  git_unset color.diff-highlight.oldHighlight
+  git_unset color.diff-highlight.newNormal
+  git_unset color.diff-highlight.newHighlight
+
+  git_unset color.diff.meta
+  git_unset color.diff.frag
+  git_unset color.diff.func
+  git_unset color.diff.commit
+  git_unset color.diff.old
+  git_unset color.diff.new
+  git_unset color.diff.whitespace
+}
+
+git_set core.editor vim
 
 git_alias st status
 
@@ -103,25 +149,11 @@ git_alias shd "stash drop"
 git_alias aliases "config --get-regexp alias"
 git_alias configs "config --list"
 
-if can_run diff-so-fancy; then
+#if can_run diff-so-fancy; then
-  git_set core.pager "diff-so-fancy | less --tabs=4 -RFX"
+#  activate_diff_so_fancy
-  git_set interactive.diffFilter "diff-so-fancy --patch"
+#fi
 
-  git_set color.ui true
+if can_run delta; then
-
+  echo "Activate delta"
-  git_set color.diff-highlight.oldNormal    "red bold"
+  activate_delta
-  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