diff options
Diffstat (limited to 'blame.go')
| -rw-r--r-- | blame.go | 51 |
1 files changed, 26 insertions, 25 deletions
@@ -23,32 +23,33 @@ type BlameResult struct { Lines []*Line } -// Blame returns a BlameResult that contains all the data needed to know the -// last author of each line of an specified file starting the history from -// a specified commit. The file to blame is identified by the input arguments: -// commit and path. commit is a Commit object obtained from a Repository. Path -// represents a path to a specific file contained into the repository. -// -// Blaming a file is a two step process: -// -// 1. Create a linear history of the commits affecting a file. We use -// revlist.New for that. -// -// 2. Then build a graph with a node for every line in every file in -// the history of the file. -// -// Each node is assigned a commit: Start by the nodes in the first -// commit. Assign that commit as the creator of all its lines. -// -// Then jump to the nodes in the next commit, and calculate the diff -// between the two files. Newly created lines get -// assigned the new commit as its origin. Modified lines also get -// this new commit. Untouched lines retain the old commit. -// -// All this work is done in the assignOrigin function which holds all -// the internal relevant data in a "blame" struct, that is not -// exported. +// Blame returns a BlameResult with the information about the last author of +// each line from file `path` at commit `c`. func Blame(c *object.Commit, path string) (*BlameResult, error) { + // The file to blame is identified by the input arguments: + // commit and path. commit is a Commit object obtained from a Repository. Path + // represents a path to a specific file contained into the repository. + // + // Blaming a file is a two step process: + // + // 1. Create a linear history of the commits affecting a file. We use + // revlist.New for that. + // + // 2. Then build a graph with a node for every line in every file in + // the history of the file. + // + // Each node is assigned a commit: Start by the nodes in the first + // commit. Assign that commit as the creator of all its lines. + // + // Then jump to the nodes in the next commit, and calculate the diff + // between the two files. Newly created lines get + // assigned the new commit as its origin. Modified lines also get + // this new commit. Untouched lines retain the old commit. + // + // All this work is done in the assignOrigin function which holds all + // the internal relevant data in a "blame" struct, that is not + // exported. + // // TODO: ways to improve the efficiency of this function: // 1. Improve revlist // 2. Improve how to traverse the history (example a backward traversal will |