projects.py: Add cmd_required_pkg()

Signed-off-by: Jan Lindemann <jan@janware.com>

scripts/projects.py

@@ -4,11 +4,14 @@ from __future__ import print_function
 import sys
 import argparse
 from sets import Set
+from os.path import isfile
 from os.path import isdir
 from os.path import expanduser
 from os.path import basename
 from os.path import realpath
+import subprocess
 import re
+import platform
 
 # meaning of pkg.required.xxx variables
 # build: needs to be built and installed before this can be built
@@ -33,11 +36,18 @@ def re_section(name):
                  '(?=[)',
                  re.DOTALL)
 
-def get_os():
+def remove_duplicates(seq):
+    seen = set()
+    seen_add = seen.add
+    return [x for x in seq if not (x in seen or seen_add(x))]
+
+def get_os(args = ""):
     for d in [ projs_root + 'ytools/devutil/scripts', '/opt/ytools/bin' ]:
-        script=d + '/get_os.sh'
+        script = d + '/get_os.sh'
-        if os.path.isfile(script):
+        if isfile(script):
             cmd = '/bin/bash ' + script
+            if args:
+                cmd = cmd + ' ' + args
             p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
             (out, rr) = p.communicate()
             if rr:
@@ -57,9 +67,9 @@ def htdocs_dir(name):
 
 def pkg_required_os_cascade():
     os = get_os()
-    # TODO: implement this
+    name = re.sub('-.*', '', os)
-    #return [ 'os', 'os.linux', 'os.linux.suse', 'os.linux.suse.tumbleweed' ] ?
+    # e.g. os, linux, suse, suse-tumbleweed
-    return [ 'os', 'linux', 'suse', 'suse-tumbleweed' ]
+    return [ 'os', platform.system().lower(), name, os ]
 
 def strip_module_from_spec(mod):
     return re.sub(r'-devel$|-run$', '', re.split('([=><]+)', mod)[0].strip())
@@ -131,6 +141,14 @@ def get_value(name, section, key):
     #print('path = ', path, 'top_name = ', top_name, 'name = ', name)
     return read_value(path, section, key)
 
+def collect_values(names, section, key):
+    r = ""
+    for n in names:
+        val = get_value(n, section, key)
+        if val:
+            r = r + " " + val
+    return remove_duplicates([x.strip() for x in r.split(",")])
+
 # scope 0: no children
 # scope 1: children
 # scope 2: recursive
@@ -240,6 +258,24 @@ def cmd_test(args_):
     args=parser.parse_args(args_)
     print("blah = " + args.blah)
 
+def cmd_required_pkg(args_):
+    parser = argparse.ArgumentParser(description='required-pkg')
+    parser.add_argument('module', nargs='*', help='Modules')
+    args=parser.parse_args(args_)
+    deps = get_modules_from_project_txt(args.module, 'pkg.required.jw', [ 'build' ],
+            scope = 2, add_self=True, names_only=True)
+    subsecs = pkg_required_os_cascade()
+    required = []
+    for s in subsecs:
+        vals = collect_values(deps, 'pkg.required.' + s, 'build')
+        if vals:
+            required = required + vals
+    # TODO: add all not in build tree as -devel
+    r = ''
+    for m in required:
+        r = r + ' ' + m
+    print(r[1:])
+
 def cmd_ldlibpath(args_):
     parser = argparse.ArgumentParser(description='ldlibpath')
     parser.add_argument('module', nargs='*', help='Modules')