show-tool-versions.py: condense output, hide file-not-found exceptions

diff --git a/misc/build_helpers/show-tool-versions.py b/misc/build_helpers/show-tool-versions.py
index 31430a8d769e63e12399f9074605bb759c866445..db2312788a0803712056442f03c681c259934b01 100644 (file)
--- a/misc/build_helpers/show-tool-versions.py
+++ b/misc/build_helpers/show-tool-versions.py
@@ -15,11 +15,13 @@ except ImportError:
         added_zetuptoolz_egg = True
         sys.path.insert(0, egg)
 
-def foldlines(s):
-    return s.replace("\n", " ").replace("\r", "")
+def foldlines(s, numlines=None):
+    lines = s.split("\n")
+    if numlines is not None:
+        lines = lines[:numlines]
+    return " ".join(lines).replace("\r", "")
 
 def print_platform():
-    print
     try:
         import platform
         out = platform.platform()
@@ -34,12 +36,10 @@ def print_platform():
         pass
 
 def print_python_ver():
-    print
     print "python:", foldlines(sys.version)
     print 'maxunicode: ' + str(sys.maxunicode)
 
 def print_python_encoding_settings():
-    print
     print 'filesystem.encoding: ' + str(sys.getfilesystemencoding())
     print 'locale.getpreferredencoding: ' + str(locale.getpreferredencoding())
     try:
@@ -48,22 +48,23 @@ def print_python_encoding_settings():
         print 'got exception from locale.getdefaultlocale(): ', e
     print 'locale.locale: ' + str(locale.getlocale())
 
-def print_stdout(cmdlist, label=None):
-    print
+def print_stdout(cmdlist, label=None, numlines=None):
     try:
-        res = subprocess.Popen(cmdlist, stdin=open(os.devnull),
-                               stdout=subprocess.PIPE).communicate()[0]
         if label is None:
             label = cmdlist[0]
-        print label + ': ' + foldlines(res)
-    except EnvironmentError:
+        res = subprocess.Popen(cmdlist, stdin=open(os.devnull),
+                               stdout=subprocess.PIPE).communicate()[0]
+        print label + ': ' + foldlines(res, numlines)
+    except EnvironmentError, e:
+        if isinstance(e, OSError) and e.errno == 2:
+            print label + ': no such file or directory'
+            return
         sys.stderr.write("\nGot exception invoking '%s'. Exception follows.\n" % (cmdlist[0],))
         traceback.print_exc(file=sys.stderr)
         sys.stderr.flush()
         pass
 
 def print_as_ver():
-    print
     if os.path.exists('a.out'):
         print "WARNING: a file named a.out exists, and getting the version of the 'as' assembler writes to that filename, so I'm not attempting to get the version of 'as'."
         return
@@ -80,7 +81,6 @@ def print_as_ver():
         pass
 
 def print_setuptools_ver():
-    print
     if added_zetuptoolz_egg:
         # it would be misleading to report the bundled version of zetuptoolz as the installed version
         print "setuptools: using bundled egg"
@@ -98,7 +98,6 @@ def print_setuptools_ver():
 def print_py_pkg_ver(pkgname, modulename=None):
     if modulename is None:
         modulename = pkgname
-
     print
     try:
         import pkg_resources
@@ -110,9 +109,7 @@ def print_py_pkg_ver(pkgname, modulename=None):
         sys.stderr.flush()
         pass
     except pkg_resources.DistributionNotFound:
-        sys.stderr.write("\npkg_resources reported no %s package installed. Exception follows.\n" % (pkgname,))
-        traceback.print_exc(file=sys.stderr)
-        sys.stderr.flush()
+        print pkgname + ': DistributionNotFound'
         pass
     try:
         __import__(modulename)
@@ -127,20 +124,20 @@ def print_py_pkg_ver(pkgname, modulename=None):
             pass
 
 print_platform()
-
+print
 print_python_ver()
-
+print
 print_stdout(['locale'])
 print_python_encoding_settings()
-
+print
 print_stdout(['buildbot', '--version'])
 print_stdout(['cl'])
-print_stdout(['gcc', '--version'])
-print_stdout(['g++', '--version'])
+print_stdout(['gcc', '--version'], numlines=1)
+print_stdout(['g++', '--version'], numlines=1)
 print_stdout(['cryptest', 'V'])
 print_stdout(['darcs', '--version'])
 print_stdout(['darcs', '--exact-version'], label='darcs-exact-version')
-print_stdout(['7za'])
+print_stdout(['7za'], numlines=3)
 print_stdout(['flappclient', '--version'])
 print_stdout(['valgrind', '--version'])