[checks] Don't always require jigdo

If the configuration specifically requests no jigdos, there is no point
in checking for the binary existence.

This is not 100% reliable. The jigdo option defaults to True, so if the
option is not specified the binary is required even if there are no
images configured.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

bin/pungi-koji

@@ -149,11 +149,6 @@ def main():
         parser.error("please specify a config")
     opts.config = os.path.abspath(opts.config)
 
-    # check if all requirements are met
-    import pungi.checks
-    if not pungi.checks.check():
-        sys.exit(1)
-
     import kobo.conf
     import kobo.log
     import productmd.composeinfo
@@ -173,6 +168,11 @@ def main():
     conf = kobo.conf.PyConfigParser()
     conf.load_from_file(opts.config)
 
+    # check if all requirements are met
+    import pungi.checks
+    if not pungi.checks.check(conf):
+        sys.exit(1)
+
     if opts.target_dir:
         compose_dir = Compose.get_compose_dir(opts.target_dir, conf, compose_type=compose_type, compose_label=opts.label)
     else:

pungi/checks.py

@@ -18,19 +18,27 @@
 import os.path
 
 
+def is_jigdo_needed(conf):
+    return conf.get('create_jigdo', True)
+
+
+# The first element in the tuple is package name expected to have the
+# executable (2nd element of the tuple). The last element is an optional
+# function that should determine if the tool is required based on
+# configuration.
 tools = [
-    ("isomd5sum", "/usr/bin/implantisomd5"),
-    ("isomd5sum", "/usr/bin/checkisomd5"),
-    ("jigdo", "/usr/bin/jigdo-lite"),
-    ("genisoimage", "/usr/bin/genisoimage"),
-    ("gettext", "/usr/bin/msgfmt"),
-    ("syslinux", "/usr/bin/isohybrid"),
-    ("yum-utils", "/usr/bin/createrepo"),
-    ("yum-utils", "/usr/bin/mergerepo"),
-    ("yum-utils", "/usr/bin/repoquery"),
-    ("git", "/usr/bin/git"),
-    ("cvs", "/usr/bin/cvs"),
-    ("gettext", "/usr/bin/msgfmt"),
+    ("isomd5sum", "/usr/bin/implantisomd5", None),
+    ("isomd5sum", "/usr/bin/checkisomd5", None),
+    ("jigdo", "/usr/bin/jigdo-lite", is_jigdo_needed),
+    ("genisoimage", "/usr/bin/genisoimage", None),
+    ("gettext", "/usr/bin/msgfmt", None),
+    ("syslinux", "/usr/bin/isohybrid", None),
+    ("yum-utils", "/usr/bin/createrepo", None),
+    ("yum-utils", "/usr/bin/mergerepo", None),
+    ("yum-utils", "/usr/bin/repoquery", None),
+    ("git", "/usr/bin/git", None),
+    ("cvs", "/usr/bin/cvs", None),
+    ("gettext", "/usr/bin/msgfmt", None),
 ]
 
 imports = [
@@ -42,7 +50,7 @@ imports = [
 ]
 
 
-def check():
+def check(conf):
     fail = False
 
     # Check python modules
@@ -54,7 +62,10 @@ def check():
             fail = True
 
     # Check tools
-    for package, path in tools:
+    for package, path, test_if_required in tools:
+        if test_if_required and not test_if_required(conf):
+            # The config says this file is not required, so we won't even check it.
+            continue
         if not os.path.exists(path):
             print("Program '%s' doesn't exist. Install package '%s'." % (path, package))
             fail = True

tests/data/dummy-pungi.conf

@@ -109,3 +109,5 @@ createiso_skip = [
         'src': True
     }),
 ]
+
+create_jigdo = False