lookup: Lookup

Description

Lookup one object in a repository.

Usage

lookup(repo, sha)
## S3 method for class '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

Run this code

## 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))

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