golang + Godeps: Adding new dependency override Godeps.json file

Question

I'm using Godeps to save my dependencies with my go project.

For now my Godeps.json file looks like this:

{
    "ImportPath": "github.com/some/repo",
    "GoVersion": "go1.6",
    "GodepVersion": "v74",
    "Packages": [
        "gopkg.in/mgo.v2",
        "github.com/sendgrid/sendgrid-go",
        "gopkg.in/olivere/elastic.v3"
    ],
    "Deps": [
        {
            "ImportPath": "github.com/sendgrid/sendgrid-go",
            "Comment": "v2.0.0-22-g6ea8b2b",
            "Rev": "6ea8b2b2d54b2e54efcf8668867289a1838d96fd"
        },
        {
            "ImportPath": "github.com/sendgrid/smtpapi-go",
            "Comment": "v0.4.0-7-gb88787c",
            "Rev": "b88787cc8801ef961d7daef0bcb79ae3f50bfd52"
        },
        {
            "ImportPath": "gopkg.in/check.v1",
            "Rev": "4f90aeace3a26ad7021961c297b22c42160c7b25"
        },
        {
            "ImportPath": "gopkg.in/mgo.v2",
            "Comment": "r2016.02.04-1-gb6e2fa3",
            "Rev": "b6e2fa371e64216a45e61072a96d4e3859f169da"
        },
        {
            "ImportPath": "gopkg.in/mgo.v2/bson",
            "Comment": "r2016.02.04-1-gb6e2fa3",
            "Rev": "b6e2fa371e64216a45e61072a96d4e3859f169da"
        },
        {
            "ImportPath": "gopkg.in/mgo.v2/internal/sasl",
            "Comment": "r2016.02.04-1-gb6e2fa3",
            "Rev": "b6e2fa371e64216a45e61072a96d4e3859f169da"
        },
        {
            "ImportPath": "gopkg.in/mgo.v2/internal/scram",
            "Comment": "r2016.02.04-1-gb6e2fa3",
            "Rev": "b6e2fa371e64216a45e61072a96d4e3859f169da"
        },
        {
            "ImportPath": "gopkg.in/olivere/elastic.v3",
            "Comment": "v3.0.40",
            "Rev": "7a92d18eaf7a9f95d603e70970fb5adcd4dc62f1"
        },
        {
            "ImportPath": "gopkg.in/olivere/elastic.v3/backoff",
            "Comment": "v3.0.40",
            "Rev": "7a92d18eaf7a9f95d603e70970fb5adcd4dc62f1"
        },
        {
            "ImportPath": "gopkg.in/olivere/elastic.v3/uritemplates",
            "Comment": "v3.0.40",
            "Rev": "7a92d18eaf7a9f95d603e70970fb5adcd4dc62f1"
        }
    ]
}

If I want to install a new dependency using go get:

go get "github.com/robfig/cron"

This will override my Godeps.json file and it will store only the latest package I have installed, and further more It will delete the packages from my vendor folder.

How can I add this dependency instead of replace it?

Answer 1

If you do not run godeps save then the new dependency will not be saved in your Godeps.json. It's hard to imagine why you would want two version of the same library though, but if you really want to do it, then during deployment of your project, first do godep restore and then install your dependency as go get "github.com/robfig/cron".This will then prevent a replacement