scripts/*: add Makefile generator.zv/genmake

This commit adds a few scripts to the packages repository:

  * configure

        Typical 'configure' script; run to see usage.

  * scripts/genmake

        Generates a top-level 'Makefile' that will either
        build packages in the correct order, or sleep to
        simulate package builds. The main purpose of this
        tool is to enable concurrent package builds, and
        to provide a framework to analyze build strategies.

When a dependency is updated, it is the responsibility of
the maintainer to relbump all dependent packages. This tool
is intended to facilitate concurrent package builds, not be
a comprehensive maintenance tool.

1 files changed, 103 insertions, 0 deletions

diff --git a/configure b/configure
new file mode 100755
index 000000000..72abed07d
--- /dev/null
+++ b/configure
@@ -0,0 +1,103 @@
+#!/bin/sh -e
+
+HERE="$(dirname $(readlink -f ${0}))";
+
+##
+# Full list of all possible repositories.
+#
+repos=$(grep -v ^# <<EOF
+system
+user
+legacy
+experimental
+EOF
+);
+
+##
+# Do not build any repos by default.
+#
+build="";
+
+##
+# Usage.
+#
+usage ()
+{
+    printf "Usage: %s OPTION [OPTION] ...\n" "${0}";
+
+    printf "\nOptions:\n\n";
+    cat <<"EOF"
+    --simulate      Sleep 1 second instead of build
+EOF
+
+    printf "\nRepositories:\n\n";
+    for k in ${repos}; do
+        printf "    --enable-%s\n" "${k}";
+    done
+    printf "\n";
+}
+
+##
+# Enable repositories only explicitly.
+#
+_find=;
+_fake=0; # default not a simulation
+for arg; do
+    case "${arg}" in
+        --enable-*)
+            for repo in ${repos}; do
+                _find=0;
+                if test "${arg##*-}" = "${repo}"; then
+                    build="${build} ${repo}";
+                    _find=1;
+                    break;
+                fi
+            done
+            if test ${_find} -eq 0; then
+                printf "E: Repository '%s' is not supported!\n" "${arg##*-}";
+                exit 1;
+            fi
+            ;;
+        --simulate)
+            _fake=1;
+            ;;
+        *)
+            printf "E: Option '%s' is not supported!\n" "${arg}";
+            exit 1;
+            ;;
+    esac
+done
+
+##
+# Sorted order.
+#
+build=$(printf "%s\n" "${build}" | tr ' ' '\n' | sort | uniq | xargs);
+
+##
+# Sanity checks.
+#
+if test "${#build}" -eq 0; then
+    usage;
+    exit 0;
+fi
+
+##
+# Generate Makefile.
+#
+printf "Generating subpackage index ...\n";
+"${HERE}"/scripts/setup;
+printf "Generating dependency list ...\n";
+"${HERE}"/scripts/deplist ${build} | "${HERE}"/scripts/genmake ${_fake};
+
+##
+# Generate report.
+#
+printf "\nSuccess!\n\n";
+
+_numpkgs=$(grep -E '^.*/.*:' "${HERE}"/Makefile | wc -l);
+printf "    Packages\t: %s\n" "${_numpkgs}";
+printf "\n";
+
+if test ${_fake} -eq 1; then
+    printf "SIMULATION ONLY! NO PACKAGES WILL BE BUILT!\n\n";
+fi