feat(gdiff): use delta as git's core pager

Author: Bhavi Dhingra

util/__common

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+#shellcheck disable=SC2034 	# CUSTOM_GIT_PAGER appears unused. Verify use (or export if used externally)
+
+CUSTOM_GIT_PAGER="$(git config core.pager || echo 'cat')"

util/fzf_previews/__gdiff_preview

@@ -3,6 +3,7 @@
 #shellcheck disable=SC2155
 #shellcheck disable=SC1091
 
+source "${__CUSTOM_GIT_UTIL}"/__common
 source "$__CUSTOM_CONSOLE_UTIL"/__split_str
 source "$__CUSTOM_CONSOLE_UTIL"/__trim_double_quotes
 
@@ -15,10 +16,10 @@ function __gdiff_preview() {
 		file="$(__trim_double_quotes "${file}")"
 
 		if [[ ${str:0:1} != " " ]];then		# file is staged
-			git diff --cached --color -- "${file}"
+			git diff --cached --color -- "${file}" | ${CUSTOM_GIT_PAGER}
 		fi
 		if [[ ${str:1:1} != " " ]];then		# file is unstaged
-			git diff --color -- "${file}"
+			git diff --color -- "${file}" | ${CUSTOM_GIT_PAGER}
 		fi
 		return
 	fi
@@ -37,12 +38,12 @@ function __gdiff_preview() {
 	done
 
 	if [[ ${str:0:1} == "R" ]]; then
-		git diff --cached --color -- "${oldFile}" "${newFile}"
+		git diff --cached --color -- "${oldFile}" "${newFile}" | ${CUSTOM_GIT_PAGER}
 
 		if [[ ${str:1:1} != " " ]]; then
-			git diff --color -- "${newFile}"
+			git diff --color -- "${newFile}" | ${CUSTOM_GIT_PAGER}
 		fi
 	else
-		git diff --color -- "${oldFile}" "${newFile}"
+		git diff --color -- "${oldFile}" "${newFile}" | ${CUSTOM_GIT_PAGER}
 	fi
 }

util/fzf_previews/__gshow_preview

@@ -1,6 +1,9 @@
 #!/bin/bash
 
 #shellcheck disable=SC2155
+#shellcheck disable=SC1091	# Not following: ./__common was not specified as input (see shellcheck -x)
+
+source "${__CUSTOM_GIT_UTIL}"/__common
 
 function __gshow_preview() {
 
@@ -9,5 +12,5 @@ function __gshow_preview() {
 	if [[ -z "${commitSHA}" ]]; then
 		return
 	fi
-	git show --color=always "${commitSHA}"
+	git show --color=always "${commitSHA}" | ${CUSTOM_GIT_PAGER}
 }