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Build CO_CHANGES edges from git commit history

Source: R/edge_builders.R
build_co_change_edges.Rd

Scans the git log and identifies R source files that were modified together in the same commit. Function nodes in those files receive bidirectional CO_CHANGES edges with weight proportional to how often the files change together (capped at 1.0).

Usage

build_co_change_edges(func_nodes, project_root = ".", min_cochanges = 2L)

Arguments

func_nodes

A list of node records from extract_function_nodes().

project_root

Character(1). Root of the git repository. Defaults to ".".

min_cochanges

Integer(1). Minimum number of co-change commits required to create an edge. Default 2L.

Value

A data.frame with columns from, to, weight. Zero rows when no qualifying pairs are found.

Details

Requires that project_root is inside a git repository. Returns zero rows silently when git is unavailable or the project has no commit history with co-changed R files.

See also

build_call_edges(), build_rrlm_graph()

Examples

if (FALSE) { # \dontrun{
proj  <- detect_rproject("/path/to/mypkg")
nodes <- extract_function_nodes(proj$r_files)
edges <- build_co_change_edges(nodes, proj$root)
} # }