Add automatic logging of all operations

build.sh.functions

@@ -18,6 +18,9 @@
 
 # Written by Tom G. Christensen <tgc@jupiterrise.com>.
 
+# Automatic logging is enabled by default
+autolog=1
+
 # Define script functions and register them
 METHODS=""
 reg() {
@@ -64,6 +67,39 @@ build_sh() {
 
     for METHOD in $*
     do
-	( $METHOD )
+	( log_start $METHOD; $METHOD; log_stop )
     done
 }
+
+# Start a logfile
+# Note this should only be used *after* the buildpkg.* libraries
+# have been sourced, otherwise most of the variables used to construct
+# the logfile name are undefined.
+log_start()
+{
+    local func=$1
+    build_sh_logfile=${topdir}-${version}_${pkgver}-${os}-${arch}-${func}-$(date +%Y%m%d%H%M%S).log
+
+    if [ $autolog -eq 1 ]; then
+	# save stdout and stderr to file descriptors 3 and 4
+	# then redirect them to $build_sh_logfile
+	echo "Opening logfile: $build_sh_logfile"
+	exec 3>&1 4>&2 >$build_sh_logfile 2>&1
+	# Log a timestamp
+	date +%Y%m%d%H%M%S
+	# Get information about the compiler into the logfile
+	identify_compiler log
+    fi
+}
+
+# Stop logging
+log_stop()
+{
+    if [ $autolog -eq 1 ]; then
+	# Log a timestamp
+	date +%Y%m%d%H%M%S
+	# restore stdout and stderr
+	exec 1>&3 2>&4
+	echo "Closing logfile: $build_sh_logfile"
+    fi
+}