Fix macports package present/active detection (#1308)

* Fix typo in redhat_subscription testcase

* Fix macports state=present matching against the wrong package name

Previous implementation returned true if the desired package name occurred anywhere in
the list of all installed packages. For example as a substring of another package name,
or even as a substring of a variant name for a different package.

Instead:

- request macports only list installed packages matching the desired package name, instead of all installed packages.
  - Note `port` exits with 0 regardless of whether any packages match the requested name.
- pass `-q` flag: "Do not print the header line. This is useful when parsing the output of port installed in scripts for further processing."
- eliminate `use_unsafe_shell=True` by searching stdout contents natively in python
instead of using `grep`. This has the added benefit of eliminating any potential
misinterpretation of characters in the package name as regex special characters.

If there are zero matching installed packages, `out` is empty.
If there are one or more matches (due to multiple installed versions), the output format
is: ec8a2bc682/src/port/port.tcl (L3320-L3323)

Notably, two leading spaces, the package name, a space, and then other information.
According to blame via github, those lines haven't changed in 11 years.

* Update macports state=active to eliminate use_unsafe_shell

Similar to previous commit (for macports state=present):

- pass `-q` flag: "Do not print the header line. This is useful when parsing the output of port installed in scripts for further processing."
- search stdout contents natively in python instead of using `grep`.
- added parentheses to search string to eliminate false positives if the package name
or variants contain the word `active`. Still could fail if they contain `(active)`, but
that's less likely

If there are zero matching installed packages, `out` is empty.
If there are one or more matches (due to multiple installed versions), the output format
is: ec8a2bc682/src/port/port.tcl (L3320-L3323)

For "state=active", we're looking for a line that contains `(active)` in the output.

* Basic test case of query_port for present and active

* Attempt to fix lint errors in test

* Different mock module creation, changed test cases indentation/spacing

- picked the wrong mock code to cargo-cult. Thanks to felixfontein for this suggestion
- 4 space indentation on continuation line. I thought I had that originally, but it looks like my editor sabotaged me with mixed tabs/spaces
- Remove leading newline on multi-line test cases. I don't think it would make a difference, but I'd read up on how the python syntax works and want to more accurately represent macports output.

fingers crossed this addresses the known build errors

* Add changelog fragment

* Update tests/unit/plugins/modules/packaging/os/test_macports.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update changelogs/fragments/1307-macports-fix-status-check.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/modules/packaging/os/macports.py

@@ -148,17 +148,18 @@ def query_port(module, port_path, name, state="present"):
 
     if state == "present":
 
-        rc, out, err = module.run_command("%s installed | grep -q ^.*%s" % (shlex_quote(port_path), shlex_quote(name)), use_unsafe_shell=True)
-        if rc == 0:
+        rc, out, err = module.run_command([port_path, "-q", "installed", name])
+
+        if rc == 0 and out.strip().startswith(name + " "):
             return True
 
         return False
 
     elif state == "active":
 
-        rc, out, err = module.run_command("%s installed %s | grep -q active" % (shlex_quote(port_path), shlex_quote(name)), use_unsafe_shell=True)
+        rc, out, err = module.run_command([port_path, "-q", "installed", name])
 
-        if rc == 0:
+        if rc == 0 and "(active)" in out:
             return True
 
         return False