R: Lookup

lookup {git2r} | R Documentation

## Lookup

### Description

Lookup one object in a repository.

### Usage

    lookup(repo, sha)

    ## S4 method for signature 'git_repository,character'
    lookup(repo, sha)

### Arguments

`repo` | The repository.
`sha` | The identity of the object to lookup. Must be 4 to 40 characters long.

### Value

a `git_blob` or `git_commit` or `git_tag` or `git_tree` object

### Examples

    ## Not run:
    ## Initialize a temporary repository
    path <- tempfile(pattern="git2r-")
    dir.create(path)
    repo <- init(path)

    ## Create a user and commit a file
    config(repo, user.name="Alice", user.email="alice@example.org")
    writeLines("Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do",
               file.path(path, "example.txt"))
    add(repo, "example.txt")
    commit_1 <- commit(repo, "First commit message")

    ## Create tag
    tag(repo, "Tagname", "Tag message")

    ## First, get SHAs to lookup in the repository
    sha_commit <- commit_1@sha
    sha_tree <- tree(commit_1)@sha
    sha_blob <- tree(commit_1)["example.txt"]@sha
    sha_tag <- tags(repo)[[1]]@sha

    ## SHAs
    sha_commit
    sha_tree
    sha_blob
    sha_tag

    ## Lookup objects
    lookup(repo, sha_commit)
    lookup(repo, sha_tree)
    lookup(repo, sha_blob)
    lookup(repo, sha_tag)

    ## Lookup objects, using only the first seven characters
    lookup(repo, substr(sha_commit, 1, 7))
    lookup(repo, substr(sha_tree, 1, 7))
    lookup(repo, substr(sha_blob, 1, 7))
    lookup(repo, substr(sha_tag, 1, 7))

    ## End(Not run)

[Package git2r version 0.21.0 Index]