improve checkstyle.sh compatibility with non-GNU systems

git-svn-id: https://svn.code.sf.net/p/vice-emu/code/trunk@45916 379a1393-f5fb-40a0-bcee-ef074d9b53f7

Author: ikorb

vice/src/checkstyle.sh

@@ -8,7 +8,7 @@ function checkcppcomments
 {
     echo "finding c++ style comments:"
 # first make a list of files, omitting those we dont want to check
-    find -name '*.[chm]' | \
+    find . -name '*.[chm]' | \
         grep -v "/arch/gtk3/novte/" | \
         grep -v "/lib/" | \
         grep -v '/resid/' | \
@@ -17,11 +17,11 @@ function checkcppcomments
     while IFS= read -r line
     do
         grep -Hn '//' "$line" | \
-            sed -s 's/http:\/\//http:/g' | \
-            sed -s 's/https:\/\//https:/g' | \
-            sed -s 's/ip4:\/\//ip4:/g' | \
-            sed -s 's/ip6:\/\//ip6:/g' | \
-            sed -s 's/file:\/\//file:/g' | \
+            ${SED} -s 's/http:\/\//http:/g' | \
+            ${SED} -s 's/https:\/\//https:/g' | \
+            ${SED} -s 's/ip4:\/\//ip4:/g' | \
+            ${SED} -s 's/ip6:\/\//ip6:/g' | \
+            ${SED} -s 's/file:\/\//file:/g' | \
             grep --color '//'
     done < .checkcppcomments
     rm -f .checkcppcomments
@@ -32,13 +32,13 @@ function checktabs
 {
     echo "finding TABs:"
 # first make a list of files, omitting those we dont want to check
-    find -name '*.[chm]' | \
+    find . -name '*.[chm]' | \
         grep -v '/monitor/mon_parse.c' | \
         grep -v '/monitor/mon_lex.c' | \
         grep -v '/arch/mingw32-pcap/wpcap/' | \
         grep -v '/arch/gtk3/novte/box_drawing.h' | \
         grep -v "/lib/" > .checktabs
-    find -name '*.cc' | \
+    find . -name '*.cc' | \
         grep -v '/monitor/mon_parse.c' | \
         grep -v '/monitor/mon_lex.c' | \
         grep -v '/arch/mingw32-pcap/wpcap/' | \
@@ -61,13 +61,13 @@ function checkwhitespace
 {
     echo "finding trailing whitespace:"
 # first make a list of files, omitting those we dont want to check
-    find -name '*.[chm]' | \
+    find . -name '*.[chm]' | \
         grep -v '/monitor/mon_parse.c' | \
         grep -v '/monitor/mon_lex.c' | \
         grep -v '/arch/mingw32-pcap/wpcap/' | \
         grep -v '/arch/gtk3/novte/box_drawing.h' | \
         grep -v "/lib/" > .checkws
-    find -name '*.cc' | \
+    find . -name '*.cc' | \
         grep -v '/monitor/mon_parse.c' | \
         grep -v '/monitor/mon_lex.c' | \
         grep -v '/arch/mingw32-pcap/wpcap/' | \
@@ -76,7 +76,7 @@ function checkwhitespace
 # find trailing whitespace
     while IFS= read -r line
     do
-        grep -Hn '[[:blank:]]\+$' "$line" | sed 's/\s\+$/~~~~/'
+        grep -Hn '[[:blank:]]\+$' "$line" | ${SED} 's/\s\+$/~~~~/'
     done < .checkws
     rm -f .checkws
 }
@@ -95,6 +95,15 @@ function usage
 if [ "$#" -eq "0" ]; then
     usage
 else
+    if sed --version >/dev/null 2>&1; then
+        SED=sed
+    elif gsed --version >/dev/null 2>&1; then
+        SED=gsed
+    else
+        echo No GNU sed found
+        exit 2
+    fi
+
     for thisarg in "$@"
     do
         case "$thisarg" in