Adds a Javascript language analyzer

[zomglings]

Resolves https://github.com/bugout-dev/locust/issues/21

Some work still remains around:

1. Polyglot Locust docker images? Or at least chaining together a Locust pipeline through docker containers.
2. Publishing the Javascript plugin to NPM
3. Defining Locust data structures in a protobuf-like data format so that we can autogenerate types/containers for various languages.

But this is the architecture we will use for additional languages going forward.

[github-actions[bot]]

Locust summary

Git references

Initial: 0418cad
Terminal: 9be912e

---

locust/parse.py

Changes:

• Name: LocustVisitor
  Type: class
  Changed lines: 9
  Total lines: 58
  Changes:
  • Name: LocustVisitor.__init__
    Type: function
    Changed lines: 1
    Total lines: 3
  • Name: LocustVisitor.patch_definitions
    Type: function
    Changed lines: 7
    Total lines: 8
• Name: RunResponse
  Type: class
  Changed lines: 6
  Total lines: 6
• Name: definitions_by_patch
  Type: function
  Changed lines: 12
  Total lines: 12
• Name: locust_changes_in_patch
  Type: function
  Changed lines: 53
  Total lines: 57
• Name: calculate_changes
  Type: function
  Changed lines: 11
  Total lines: 11
• Name: calculate_python_changes
  Type: function
  Changed lines: 3
  Total lines: 3
• Name: calculate_changes_from_file
  Type: function
  Changed lines: 13
  Total lines: 13
• Name: calculate_plugin_changes
  Type: function
  Changed lines: 38
  Total lines: 38
• Name: run
  Type: function
  Changed lines: 5
  Total lines: 12
• Name: populate_argument_parser
  Type: function
  Changed lines: 12
  Total lines: 12
• Name: main
  Type: function
  Changed lines: 2
  Total lines: 31

tests/test_parse.py

Changes:

• Name: TestLocustParse
  Type: class
  Changed lines: 3
  Total lines: 29
  Changes:
  • Name: TestLocustParse.test_parse_run
    Type: function
    Changed lines: 1
    Total lines: 26

locust/cli.py

Changes:

• Name: generate_argument_parser
  Type: function
  Changed lines: 1
  Total lines: 17
• Name: main
  Type: function
  Changed lines: 1
  Total lines: 15

locust/git.py

Changes:

• Name: HunkBoundary
  Type: class
  Changed lines: 4
  Total lines: 4
• Name: HunkInfo
  Type: class
  Changed lines: 3
  Total lines: 6
• Name: PatchInfo
  Type: class
  Changed lines: 2
  Total lines: 6
• Name: get_patches
  Type: function
  Changed lines: 12
  Total lines: 30
• Name: hunk_boundary
  Type: function
  Changed lines: 26
  Total lines: 26
• Name: process_hunk
  Type: function
  Changed lines: 6
  Total lines: 22
• Name: revision_file
  Type: function
  Changed lines: 7
  Total lines: 38

locust/render.py

Changes:

• Name: run
  Type: function
  Changed lines: 2
  Total lines: 21

tests/test_git.py

Changes:

• Name: TestLocustGit
  Type: class
  Changed lines: 2
  Total lines: 21