Make dpkg exec smarter; Update bash, tcsh, and zsh

3 files changed, 43 insertions, 0 deletions

diff --git a/data/zsh/_metadata/depends b/data/zsh/_metadata/depends
new file mode 100644
index 000000000..e089aacc5
--- /dev/null
+++ b/data/zsh/_metadata/depends
@@ -0,0 +1 @@
+dpkg (>= 1.18.25-10)
diff --git a/data/zsh/_metadata/postinst b/data/zsh/_metadata/postinst
new file mode 100755
index 000000000..70fa1d460
--- /dev/null
+++ b/data/zsh/_metadata/postinst
@@ -0,0 +1,17 @@
+#!/bin/zsh
+
+set -e
+
+if [ ! -e /bin/sh ]; then
+    ln -s zsh /bin/sh
+fi
+
+case "$1" in
+    abort-remove|configure)
+        dpkg-divert --quiet --local --divert /bin/sh.distrib /bin/sh
+        update-alternatives --quiet --install /bin/sh sh /bin/zsh 100 || true
+        ;;
+    *)
+        exit 0
+        ;;
+esac
diff --git a/data/zsh/_metadata/prerm b/data/zsh/_metadata/prerm
new file mode 100755
index 000000000..bf7fadd2e
--- /dev/null
+++ b/data/zsh/_metadata/prerm
@@ -0,0 +1,25 @@
+#!/bin/zsh
+
+set -e
+
+case "$1" in
+    upgrade)
+  ;;
+
+    remove|deconfigure)
+      update-alternatives --quiet --remove sh /bin/zsh
+      dpkg-divert --quiet --remove /bin/sh
+      if [ ! -e /bin/sh ]; then
+          echo There would be no shell!
+          ln -s zsh /bin/sh
+          exit 1
+      fi
+  ;;
+
+    failed-upgrade)
+  ;;
+    *)
+        echo "prerm called with unknown argument \`$1'" >&2
+        exit 1
+  ;;
+esac