[PATCH v4 1/2] devtools: move build symbol map function

[Ankur Dwivedi <adwivedi@marvell.com>]

This patch moves the build_map_changes function from
check-symbol-change.sh to a new build-symbol-map.sh file.
This function can be used in other scripts by including
build-symbol-map.sh file.

Signed-off-by: Ankur Dwivedi <adwivedi@marvell.com>
---
 devtools/build-symbol-map.sh    | 78 +++++++++++++++++++++++++++++++++
 devtools/check-symbol-change.sh | 76 +-------------------------------
 2 files changed, 80 insertions(+), 74 deletions(-)
 create mode 100755 devtools/build-symbol-map.sh

diff --git a/devtools/build-symbol-map.sh b/devtools/build-symbol-map.sh
new file mode 100755
index 0000000000..86e4279cdc
--- /dev/null
+++ b/devtools/build-symbol-map.sh
@@ -0,0 +1,78 @@
+#!/bin/sh
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Neil Horman <nhorman@tuxdriver.com>
+
+build_map_changes()
+{
+	local fname="$1"
+	local mapdb="$2"
+
+	cat "$fname" | awk '
+		# Initialize our variables
+		BEGIN {map="";sym="";ar="";sec=""; in_sec=0; in_map=0}
+
+		# Anything that starts with + or -, followed by an a
+		# and ends in the string .map is the name of our map file
+		# This may appear multiple times in a patch if multiple
+		# map files are altered, and all section/symbol names
+		# appearing between a triggering of this rule and the
+		# next trigger of this rule are associated with this file
+		/[-+] [ab]\/.*\.map/ {map=$2; in_map=1; next}
+
+		# The previous rule catches all .map files, anything else
+		# indicates we left the map chunk.
+		/[-+] [ab]\// {in_map=0}
+
+		# Triggering this rule, which starts a line and ends it
+		# with a { identifies a versioned section.  The section name is
+		# the rest of the line with the + and { symbols removed.
+		# Triggering this rule sets in_sec to 1, which actives the
+		# symbol rule below
+		/^.*{/ {
+			gsub("+", "");
+			if (in_map == 1) {
+				sec=$(NF-1); in_sec=1;
+			}
+		}
+
+		# This rule identifies the end of a section, and disables the
+		# symbol rule
+		/.*}/ {in_sec=0}
+
+		# This rule matches on a + followed by any characters except a :
+		# (which denotes a global vs local segment), and ends with a ;.
+		# The semicolon is removed and the symbol is printed with its
+		# association file name and version section, along with an
+		# indicator that the symbol is a new addition.  Note this rule
+		# only works if we have found a version section in the rule
+		# above (hence the in_sec check) And found a map file (the
+		# in_map check).  If we are not in a map chunk, do nothing.  If
+		# we are in a map chunk but not a section chunk, record it as
+		# unknown.
+		/^+[^}].*[^:*];/ {gsub(";","");sym=$2;
+			if (in_map == 1) {
+				if (in_sec == 1) {
+					print map " " sym " " sec " add"
+				} else {
+					print map " " sym " unknown add"
+				}
+			}
+		}
+
+		# This is the same rule as above, but the rule matches on a
+		# leading - rather than a +, denoting that the symbol is being
+		# removed.
+		/^-[^}].*[^:*];/ {gsub(";","");sym=$2;
+			if (in_map == 1) {
+				if (in_sec == 1) {
+					print map " " sym " " sec " del"
+				} else {
+					print map " " sym " unknown del"
+				}
+			}
+		}' > "$mapdb"
+
+		sort -u "$mapdb" > "$mapdb.2"
+		mv -f "$mapdb.2" "$mapdb"
+
+}
diff --git a/devtools/check-symbol-change.sh b/devtools/check-symbol-change.sh
index 8992214ac8..874afa2632 100755
--- a/devtools/check-symbol-change.sh
+++ b/devtools/check-symbol-change.sh
@@ -2,80 +2,8 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Neil Horman <nhorman@tuxdriver.com>
 
-build_map_changes()
-{
-	local fname="$1"
-	local mapdb="$2"
-
-	cat "$fname" | awk '
-		# Initialize our variables
-		BEGIN {map="";sym="";ar="";sec=""; in_sec=0; in_map=0}
-
-		# Anything that starts with + or -, followed by an a
-		# and ends in the string .map is the name of our map file
-		# This may appear multiple times in a patch if multiple
-		# map files are altered, and all section/symbol names
-		# appearing between a triggering of this rule and the
-		# next trigger of this rule are associated with this file
-		/[-+] [ab]\/.*\.map/ {map=$2; in_map=1; next}
-
-		# The previous rule catches all .map files, anything else
-		# indicates we left the map chunk.
-		/[-+] [ab]\// {in_map=0}
-
-		# Triggering this rule, which starts a line and ends it
-		# with a { identifies a versioned section.  The section name is
-		# the rest of the line with the + and { symbols removed.
-		# Triggering this rule sets in_sec to 1, which actives the
-		# symbol rule below
-		/^.*{/ {
-			gsub("+", "");
-			if (in_map == 1) {
-				sec=$(NF-1); in_sec=1;
-			}
-		}
-
-		# This rule identifies the end of a section, and disables the
-		# symbol rule
-		/.*}/ {in_sec=0}
-
-		# This rule matches on a + followed by any characters except a :
-		# (which denotes a global vs local segment), and ends with a ;.
-		# The semicolon is removed and the symbol is printed with its
-		# association file name and version section, along with an
-		# indicator that the symbol is a new addition.  Note this rule
-		# only works if we have found a version section in the rule
-		# above (hence the in_sec check) And found a map file (the
-		# in_map check).  If we are not in a map chunk, do nothing.  If
-		# we are in a map chunk but not a section chunk, record it as
-		# unknown.
-		/^+[^}].*[^:*];/ {gsub(";","");sym=$2;
-			if (in_map == 1) {
-				if (in_sec == 1) {
-					print map " " sym " " sec " add"
-				} else {
-					print map " " sym " unknown add"
-				}
-			}
-		}
-
-		# This is the same rule as above, but the rule matches on a
-		# leading - rather than a +, denoting that the symbol is being
-		# removed.
-		/^-[^}].*[^:*];/ {gsub(";","");sym=$2;
-			if (in_map == 1) {
-				if (in_sec == 1) {
-					print map " " sym " " sec " del"
-				} else {
-					print map " " sym " unknown del"
-				}
-			}
-		}' > "$mapdb"
-
-		sort -u "$mapdb" > "$mapdb.2"
-		mv -f "$mapdb.2" "$mapdb"
-
-}
+selfdir=$(dirname $(readlink -f $0))
+. $selfdir/build-symbol-map.sh
 
 is_stable_section() {
 	[ "$1" != 'EXPERIMENTAL' ] && [ "$1" != 'INTERNAL' ]
-- 
2.25.1