Cleanup init verbose output

[darkowlzz]

• Remove "dep:" prefix logs.
• Remove logging gps solution lock constraints, instead enumerate not on disk
  projects.

[darkowlzz]

With this, as discussed in #512, dep init feedback would contain the hints/inputs of the init mode. When a local search is performed (GOPATH), the data obtained from the search is logged as feedback. Dependencies that require network to resolve are enumerated separately. No constraint details are logged. Only the direct dependencies are enumerated, no transitive dependencies.

$ dep init -no-examples -v
Searching GOPATH for projects...
  Using master as constraint for direct dep github.com/fsnotify/fsnotify
  Locking in master (fd9ec7d) for direct dep github.com/fsnotify/fsnotify
  Locking in master (ca83bd2) for transitive dep golang.org/x/sys
Following dependencies were not found in GOPATH. Dep will use the most recent versions of these projects.
  github.com/darkowlzz/openurl
  github.com/sdboyer/deptestdos
Root project is "github.com/darkowlzz/foo"
 2 transitively valid internal packages
 3 external packages imported from 3 projects
(0)   ✓ select (root)
(1)	? attempt github.com/fsnotify/fsnotify with 1 pkgs; at least 1 versions to try
(1)	    try github.com/fsnotify/fsnotify@master
(1)	✓ select github.com/fsnotify/fsnotify@master w/1 pkgs
(2)	? attempt golang.org/x/sys with 1 pkgs; at least 1 versions to try
(2)	    try golang.org/x/sys@master
(2)	✓ select golang.org/x/sys@master w/1 pkgs
(3)	? attempt github.com/sdboyer/deptestdos with 1 pkgs; 2 versions to try
(3)	    try github.com/sdboyer/[email protected]
(3)	✓ select github.com/sdboyer/[email protected] w/1 pkgs
(4)	? attempt github.com/darkowlzz/openurl with 1 pkgs; 1 versions to try
(4)	    try github.com/darkowlzz/openurl@master
(4)	✓ select github.com/darkowlzz/openurl@master w/1 pkgs
(5)	? attempt github.com/sdboyer/deptest with 1 pkgs; 4 versions to try
(5)	    try github.com/sdboyer/[email protected]
(5)	✓ select github.com/sdboyer/[email protected] w/1 pkgs
  ✓ found solution with 5 packages from 5 projects

Solver wall times by segment:
         b-list-pkgs: 1.496227916s
              b-gmal: 1.230926255s
     b-list-versions: 1.089999703s
     b-source-exists: 623.603828ms
         select-atom:    576.384µs
             satisfy:    458.083µs
            new-atom:    298.751µs
         select-root:    176.841µs
  b-deduce-proj-root:     58.781µs
               other:     36.995µs

  TOTAL: 4.442363537s

[jmank88]

Why change this from a constant time map lookup into a O(N) slice scan?

[darkowlzz]

oops! right 😅
Thanks

[jmank88]

LGTM

[carolynvs]

Just one super-small nit! 😄

[carolynvs]

Now that we don't log feedback for new projects found by the solver, let's update the comment on the for loop to remove log feedback for all the new projects on line 184.

[darkowlzz]

wow! thanks for noticing that 😊