initial make support (#185)

Co-authored-by: Yethal <nosuchemail@email.com>

custom-completions/make/README.md

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+# Make Custom Completions
+
+### Definition
+
+These scripts should be used to demonstrate how create custom completions for make.

custom-completions/make/make-completions.nu

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+def "nu-complete make" [] {
+    open ./Makefile|lines|find ':'|where ($it|str starts-with '.') == false|split column ' '|get column1|find ':'|str find-replace ':' ''
+  }
+
+  def "nu-complete make jobs" [] {
+    seq 1 (sys|get cpu|length)
+  }
+
+  def "nu-complete make files" [] {
+    ls **/*|where type == file|get name
+  }
+
+  def "nu-complete make dirs" [] {
+    ls **/*|where type == dir|get name
+  }
+
+  extern "make" [
+    command: string@"nu-complete make"
+    --always-make(-B)                                 # Unconditionally make all targets.
+    --directory(-C): string@"nu-complete make dirs"   # Change to DIRECTORY before doing anything.
+    --debug(-d)                                       # Print various types of debugging information.
+    --environment-overrides(-e)                       # Environment variables override makefiles.
+    --eval(-E): string                                # Evaluate STRING as a makefile statement.
+    --file(-f)                                        # Read FILE as a makefile.
+    --help(-h)                                        # Print this message and exit.
+    --ignore-errors(-i)                               # Ignore errors from recipes.
+    --include-dir(-I): string@"nu-complete make dirs" # Search DIRECTORY for included makefiles.
+    --jobs(-j): int@"nu-complete make jobs"           # Allow N jobs at once; infinite jobs with no arg.
+    --keep-going(-k)                                  # Keep going when some targets can't be made.
+    --load-average(-l): int@"nu-complete make jobs"   # Don't start multiple jobs unless load is below N.
+    --check-symlink-times(-L)                         # Use the latest mtime between symlinks and target.
+    --just-print(-n)                                  # Don't actually run any recipe; just print them.
+    --dry-run                                         
+    --recon                                           
+    --assume-old: string@"nu-complete make files"     # Consider FILE to be very old and don't remake it.
+    --old-file(-o): string@"nu-complete make files"   
+    --output-sync(-O)                                 # Synchronize output of parallel jobs by TYPE.
+    --print-data-base(-p)                             # Print make's internal database.
+    --question(-q)                                    # Run no recipe; exit status says if up to date.
+    --no-builtin-rules(-r)                            # Disable the built-in implicit rules.
+    --no-builtin-variables(-R)                        # Disable the built-in variable settings.
+    --silent(-s)                                      # Don't echo recipes.
+    --quiet                                           
+    --no-silent                                       # Echo recipes (disable --silent mode).
+    --stop(-S)                                        # Turns off -k.
+    --no-keep-going                                   
+    --touch(-t)                                       # Touch targets instead of remaking them.
+    --trace                                           # Print tracing information.
+    --version(-v)                                     # Print the version number of make and exit.
+    --print-directory(-w)                             # Print the current directory.
+    --no-print-directory                              # Turn off -w, even if it was turned on implicitly.
+    --what-if(-W): string@"nu-complete files"         # Consider FILE to be infinitely new.
+    --new-file: string@"nu-complete files"            
+    --assume-new: string@"nu-complete files"          
+    --warn-undefined-variables                        # Warn when an undefined variable is referenced.
+  ]