better documentation

resolve-debbuilddeps.sh

@@ -11,25 +11,27 @@
 ## 45678901234567890123456789012345678901234567890123456789012345678901234567890
 
 SCHROOTNAME="$1"
+if test -n "${SCHROOTNAME}"; then
+  DO="schroot -c "${SCHROOTNAME}" --"
+  SUDO="schroot -c "${SCHROOTNAME}" -u root -d / --"
+else
+  DO=""
+  SUDO="sudo"
+fi
 
 function install() {
-    if test -n "${SCHROOTNAME}"; then
-        if schroot -c "${SCHROOTNAME}" -u root -d / -- apt-get -y install $*; then
-            return 0
-        fi
+    if ${SUDO} apt-get -y install $*; then
+        return 0
     else
-        if apt-get -y install $*; then
-            return 0
-        fi
+        return 1
     fi
-    return 1
 }
 
 TO_INSTALL=
 
 if test -e debian/control.in -a ! -e debian/control; then
     for f in $(sed -n 's, *AX_DEB_DEPEND_IFEXISTS(\([^)]*\)).*,\1,p' configure.ac); do
-        if test -n "$(apt-cache policy -q ${f})" && ! dpkg -l "${f}"; then
+        if test -n "$(${DO} apt-cache policy -q ${f})" && ! ${DO} dpkg -l "${f}"; then
             TO_INSTALL+=" ${f}"
         fi
     done
@@ -38,13 +40,8 @@ if test -e debian/control.in -a ! -e debian/control; then
         sed 's,@[^@]*@, dummytext,g' > debian/control
 fi
 
-if test -n "${SCHROOTNAME}"; then
-  schroot -c "${SCHROOTNAME}" -u root -d / -- apt-get -y install dpkg-dev
-  DEPS=$(schroot -c "${SCHROOTNAME}" -- dpkg-checkbuilddeps 2>&1 || true)
-else
-  apt-get -y install dpkg-dev
-  DEPS=$(dpkg-checkbuilddeps 2>&1 || true)
-fi
+install dpkg-dev
+DEPS=$(${DO} dpkg-checkbuilddeps 2>&1 || true)
 DEPS=$(echo "$DEPS" | sed -n '/Unmet build dependencies/ { s,.*Unmet build dependencies: ,,g; s, ([^)]*),,g; s, *| *,|,g; p}')
 
 for pa in ${DEPS}; do