comparison of techniques to obtain reproducible and offline builds (ascii table)

gistfile1.txt

```
                        core                                                          transparent     multiple     permanent bloat 
                        approach       offline?        fast         reproducible      when library    histories    to source repo
                       ----------      --------        ----         ------------      ------------    ---------    ---------------

 script (clone         semantic        no/fail          no          yes (`checkout        yes            no             no
 at build time)                                                       -f $HASH`)

 script (clone         semantic          yes            yes             yes               yes            no             no
 once, checkout
 at build time)

 go get                wget           yes (caching,     yes            no/fail            yes            no             no
                                      if not smart)
                                                                   
 git                   semantic          yes            yes             yes               yes            no             no
 submodules
 
 other vcs-agnostic    semantic          yes            yes             yes               yes            no             no
 hash tracking

 godep/vendoring       blob-copy         yes            yes             yes             no/fail          yes          yes/fail
 (main
 source repo)

 docker+deps           blob-copy         yes            yes             yes               yes            yes            no
 (separate
 vendored repo)
```

I don't understand why git submodules are classified in "offline: yes".