Added a generator for CPAN expressions. Expressions often require manual editing, but still something..

svn path=/nixpkgs/trunk/; revision=11947

pkgs/development/perl-modules/expression-generator/filtered-requirements.sh

@@ -0,0 +1,18 @@
+#! /bin/sh
+
+source lib-cache.sh;
+
+print_reqs() {
+	module_name="$1";
+
+	./requirements.sh "$1"| while read; do
+		if let "$(./source-download-link.sh "${REPLY}" | wc -c)" && [ perl != "$REPLY" ]; then
+			echo "$REPLY";
+		fi;
+	done;
+}
+
+module_name="$1";
+module_basename="${module_name//::/-}";
+
+cached_output print_reqs "$module_basename" "$module_name" "pure.deps";

pkgs/development/perl-modules/expression-generator/full-requirements.sh

@@ -0,0 +1,21 @@
+#! /bin/sh
+
+source lib-cache.sh;
+
+print_requirements () {
+	module_name="$1";
+
+	./requirements.sh "$module_name" | while read; do
+		echo "$REPLY";
+		print_reqs_cache "$REPLY";
+	done | sort | uniq
+};
+
+print_reqs_cache () {
+	module_name="$1";
+	module_basename="${module_name//::/-}";
+	
+	cached_output print_requirements "$module_basename" "$module_name" "full.deps";
+};
+
+print_reqs_cache "$@";

pkgs/development/perl-modules/expression-generator/grab-url.sh

@@ -0,0 +1,20 @@
+#! /bin/sh
+
+source lib-cache.sh
+
+get_file() {
+	url="$1";
+
+	if [ -n "$url" ]; then 
+		curl "$1";
+	else
+		echo -n;
+	fi;
+}
+
+url="$1";
+name="$2";
+name=${name:-$(basename "$url")}
+
+cached_output get_file "${name%%.*}" "$url" "${name#*.}"
+

pkgs/development/perl-modules/expression-generator/lib-cache.sh

@@ -0,0 +1,19 @@
+
+# First argument: command to run
+# Second argument: cache name
+# Third argument: argument to command
+# Fourth argument: cache type
+cached_output () {
+	cmd="$1";
+	basename="$2";
+	arg="$3";
+	ext="$4";
+	
+	if ! [ -e "cache-${ext//./-}/${basename}.${ext}" ]; then
+		mkdir -p "cache-${ext//./-}";
+		$cmd $arg > "cache-${ext//./-}/${basename}.${ext}";
+	fi;
+
+	cat "cache-${ext//./-}/${basename}.${ext}";
+}
+

pkgs/development/perl-modules/expression-generator/make-clean-dir.sh

@@ -0,0 +1,5 @@
+#! /bin/sh
+
+rm -rf test;
+mkdir test; 
+for i in *.sh; do ln -s ../$i test; done;

pkgs/development/perl-modules/expression-generator/requirements.sh

@@ -0,0 +1,17 @@
+#! /bin/sh
+
+source lib-cache.sh;
+
+module_name="$1";
+module_basename="${1//::/-}";
+
+print_requirements () {
+	module_name="$1";
+	
+	./retrieve-meta-yaml.sh "$module_name" |
+		sed -re '1,/^requires:/d; /^[a-z]/,$d; s@^\s*@@; s@:\s.*@@';
+	./retrieve-meta-yaml.sh "$module_name" |
+		sed -re '1,/^build_requires:/d; /^[a-z]/,$d; s@^\s*@@; s@:\s.*@@';
+};
+
+cached_output print_requirements "$module_basename" "$module_name" "direct.deps";

pkgs/development/perl-modules/expression-generator/retrieve-file-link.sh

@@ -0,0 +1,14 @@
+#! /bin/sh
+
+module_basename="$1";
+file_name="$2";
+
+version_regexp="${module_basename}(-[0-9.a-z]+){0,1}";
+author_regexp="[A-Z0-9]+";
+
+./retrieve-modulepage.sh "$module_basename" | 
+	egrep "[<]a href=\"[a-z0-9/]*/(${author_regexp}/){0,1}${version_regexp}/${file_name}" |
+	sed -re "s@.*href=\"@@; s@\".*@@" |
+	sed -re 's@^/@http://search.cpan.org/@';
+
+echo "$link_line";

pkgs/development/perl-modules/expression-generator/retrieve-meta-yaml.sh

@@ -0,0 +1,16 @@
+#! /bin/sh
+
+source lib-cache.sh;
+
+print_meta_yaml () {
+	module_name="$1";
+	module_basename="${module_name//::/-}";
+
+	./grab-url.sh "$(./retrieve-file-link.sh "$module_basename" "META.yml")" \
+		"${module_basename}.meta.yml";
+};
+
+module_name="$1";
+module_basename="${module_name//::/-}";
+
+cached_output print_meta_yaml "$module_basename" "$module_name" meta.yaml;

pkgs/development/perl-modules/expression-generator/retrieve-modulepage.sh

@@ -0,0 +1,5 @@
+#! /bin/sh
+
+module_basename="$1";
+
+./grab-url.sh "http://search.cpan.org/dist/$module_basename/" "$module_basename".html;

pkgs/development/perl-modules/expression-generator/source-download-link.sh

@@ -0,0 +1,17 @@
+#! /bin/sh
+
+source lib-cache.sh;
+
+module_name="$1";
+module_basename="${module_name//::/-}";
+
+write_link() {
+	module_basename="$1";
+
+	./retrieve-modulepage.sh "$module_basename" | 
+		grep -A 2 "This Release" |
+		grep href |
+		sed -re 's/.*href="//; s/".*//; s@^/@http://search.cpan.org/@';
+}
+
+cached_output write_link "$module_basename" "$module_basename" src.link;

pkgs/development/perl-modules/expression-generator/usage.txt

@@ -0,0 +1,10 @@
+/path/to/write-nix-expression.sh Group::Module::Submodule
+
+It will output Nix assignment formatted for placing into 
+all-packages.nix amongst all the perl packages, like perlAlgorithmDiff.
+Actually it will grab distribution unit Group-Module-Submodule via
+search.cpan.org, and make some effort to write correct dependencies.
+If among requirements there are some that have empty META.yml, or if 
+any of requirements acannot be installed by just getting distribution
+unit whose name can be guessed by replacing :: with -, manual editing
+will be needed. 

pkgs/development/perl-modules/expression-generator/write-nix-expression.sh

@@ -0,0 +1,34 @@
+#! /bin/sh
+
+cd $(dirname $0);
+
+source lib-cache.sh;
+
+print_expression () {
+	module_name="$1";
+	module_basename="${module_name//::/-}";
+	module_compressedname="perl${module_name//::/}";
+	sourcelink="$(./source-download-link.sh "${module_name}")";
+	version_name="${sourcelink%.tar.*}";
+	version_name="${version_name##*/}";
+	dependencies="$(./filtered-requirements.sh "$module_name" | sed -e 's/^/perl/; s/:://g' | xargs)";
+	source_hash=$(nix-prefetch-url "$sourcelink" 2>/dev/null);
+
+	cat <<EOF
+
+  ${module_compressedname} = import ../development/perl-modules/generic perl {
+    name = "${version_name}";
+    src = fetchurl {
+      url = ${sourcelink};
+      sha256 = "$source_hash";
+    };
+    propagatedBuildInputs = [${dependencies}];
+  };
+
+EOF
+};
+
+module_name="$1";
+module_basename="${module_name//::/-}";
+
+cached_output print_expression "$module_basename" "$module_name" "nix";