Change detection method for checking package name changes

build/install-build-deps.sh

Index: build/install-build-deps.sh
diff --git a/build/install-build-deps.sh b/build/install-build-deps.sh
index 756186d49dee1630bbe0b9da5866545d7b792e7e..2ab60d7e97a6342905dae1e0fc69c34edd7c086d 100755
--- a/build/install-build-deps.sh
+++ b/build/install-build-deps.sh
@@ -123,24 +123,28 @@ arm_list="libc6-armel-cross libc6-dev-armel-cross libgcc1-armel-cross
 
 
 # Some package names have changed over time
-if apt-cache show ttf-mscorefonts-installer >/dev/null 2>&1; then
+if ! ( apt-cache policy ttf-mscorefonts-installer
+    | grep "Candidate: (none)" >/dev/null 2>&1 ); then

[Lambros, 2013/05/28 18:26:58]

I don't know if this will work for non-English locales.

Have a look in /etc/bash-completion.d/apt and see how they test for available
package names. For example, the apt-cache "pkgnames" option looks promising.

Also, consider encapsulating the test into a Bash function, instead of repeating
the code 5 times.

   dev_list="${dev_list} ttf-mscorefonts-installer"
 else
   dev_list="${dev_list} msttcorefonts"
 fi
-if apt-cache show libnspr4-dbg >/dev/null 2>&1; then
+if ! ( apt-cache policy libnspr4-dbg
+    | grep "Candidate: (none)" >/dev/null 2>&1 ); then
   dbg_list="${dbg_list} libnspr4-dbg libnss3-dbg"
   lib_list="${lib_list} libnspr4 libnss3"
 else
   dbg_list="${dbg_list} libnspr4-0d-dbg libnss3-1d-dbg"
   lib_list="${lib_list} libnspr4-0d libnss3-1d"
 fi
-if apt-cache show libjpeg-dev >/dev/null 2>&1; then
+if ! ( apt-cache policy libjpeg-dev
+    | grep "Candidate: (none)" >/dev/null 2>&1 ); then
   dev_list="${dev_list} libjpeg-dev"
 else
   dev_list="${dev_list} libjpeg62-dev"
 fi
-if apt-cache show libudev1 >/dev/null 2>&1; then
+if ! ( apt-cache policy libudev1
+    | grep "Candidate: (none)" >/dev/null 2>&1 ); then
   dev_list="${dev_list} libudev1"
 else
   dev_list="${dev_list} libudev0"
@@ -149,7 +153,8 @@ fi
 
 # Some packages are only needed, if the distribution actually supports
 # installing them.
-if apt-cache show appmenu-gtk >/dev/null 2>&1; then
+if ! ( apt-cache policy appmenu-gtk
+    | grep "Candidate: (none)" >/dev/null 2>&1 ); then
   lib_list="$lib_list appmenu-gtk"
 fi