[PATCH 1/8] unit tests: prepare for kdumpctl and kdump-lib.sh to be unit-tested

[Coiby Xu]

Currently there are two issues with unit-testing the functions defined
in kdumpctl and other shell scripts after sourcing them,
  - kdumpctl would call main which requires root permission and would
    create single instance lock (/var/lock/kdump)
  - kdumpctl and other shell scripts directly source files under /usr/lib/kdump/

When ShellSpec load a script via "Include", it defines the__SOURCED__
variable. By making use of __SOURCED__, we can
1. let kdumpctl not call main when kdumpctl is "Include"d by ShellSpec
2. instruct kdumpctl and kdump-lib.sh to source the files in the repo
   when running ShelSpec tests

Signed-off-by: Coiby Xu 
---
 kdump-lib.sh |  7 +++++--
 kdumpctl     | 24 +++++++++++++++++-------
 2 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/kdump-lib.sh b/kdump-lib.sh
index 4ed5035..50b69e1 100755
--- a/kdump-lib.sh
+++ b/kdump-lib.sh
@@ -2,8 +2,11 @@
 #
 # Kdump common variables and functions
 #
-
-. /usr/lib/kdump/kdump-lib-initramfs.sh
+if [[ ${__SOURCED__:+x} ]]; then
+	. ./kdump-lib-initramfs.sh
+else
+	. /lib/kdump/kdump-lib-initramfs.sh
+fi

FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"

diff --git a/kdumpctl b/kdumpctl
index ac6ffeb..c7b821f 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -33,8 +33,14 @@ fi

[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
 . $dracutbasedir/dracut-functions.sh
-. /lib/kdump/kdump-lib.sh
-. /lib/kdump/kdump-logger.sh
+
+if [[ ${__SOURCED__:+x} ]]; then
+	KDUMP_LIB_PATH=.
+else
+	KDUMP_LIB_PATH=/lib/kdump
+fi
+. $KDUMP_LIB_PATH/kdump-lib.sh
+. $KDUMP_LIB_PATH/kdump-logger.sh

#initiate the kdump logger
 if ! dlog_init; then
@@ -1699,11 +1705,6 @@ reset_crashkernel_for_installed_kernel()
    fi
 }

-if [[ ! -f $KDUMP_CONFIG_FILE ]]; then
-	derror "Error: No kdump config file found!"
-	exit 1
-fi
-
 main()
 {
    # Determine if the dump mode is kdump or fadump
@@ -1776,6 +1777,15 @@ main()
    esac
 }

+if [[ ${__SOURCED__:+x} ]]; then
+	return
+fi
+
+if [[ ! -f $KDUMP_CONFIG_FILE ]]; then
+	derror "Error: No kdump config file found!"
+	exit 1
+fi
+
 # Other kdumpctl instances will block in queue, until this one exits
 single_instance_lock