scripts/*: add dependency resolver.

1 files changed, 61 insertions, 0 deletions

diff --git a/scripts/setup b/scripts/setup
new file mode 100755
index 000000000..5577c7244
--- /dev/null
+++ b/scripts/setup
@@ -0,0 +1,61 @@
+#!/bin/sh -e
+
+##
+# This script prepares the 'packages.git' repository for use by
+# the included scripts. It is not needed to build packages, but
+# is useful for maintainers. The 'autobuilder' does require it.
+#
+# Re-run any time you pull from upstream or switch branches.
+#
+
+HERE="$(dirname $(readlink -f ${0}))";
+BASE="${HERE}/..";
+
+##
+# Compile 'tsort' utility. Used to compute topological sort for
+# building the world. Assumes GCC, yes, easy enough to change.
+#
+gcc -o "${HERE}"/tsort "${HERE}"/tsort.c -O3;
+
+##
+# Compile 'sgrep' utility. Used to traverse the index generated
+# below.
+#
+gcc -o "${HERE}"/sgrep "${HERE}"/sgrep.c -O3;
+
+##
+# Build subpackage index. Used for resolving dependencies when
+# a subpackage is used instead of its parent.
+#
+# MAINTAINERS: If repos renamed/added/removed, must update below.
+#
+for repo in system user legacy; do
+    find "${BASE}/${repo}" -mindepth 1 -maxdepth 1 -type d | sort | while read k; do
+    (
+        ##
+        # Source APKBUILD in a subshell to avoid contamination.
+        #
+        . "${k}/APKBUILD";
+
+        ##
+        # Print the package name, whether it has subdeps or not.
+        #
+        printf " %s " "${k##*/}";
+
+        ##
+        # Trim non-name bits from any declared subpackage(s).
+        #
+        for s in ${subpackages} ${provides} ${pkgname}; do
+            case ${s} in
+                *::*) t=${s%%:*}; ;;
+                *:*) t=${s%%:*}; ;;
+                *=*) t=${s%%=*}; ;;
+                *) t=${s}; ;;
+            esac
+            printf " %s" "${t}";
+        done | tr ' ' '\n' | sort | uniq | xargs | sed -e 's/$/ /';
+    )
+    done
+#done | awk -v X=1 'NF>X'
+# (uncomment this ^ to exclude packages with no subpackages
+done > "${HERE}"/.index