Bash: calls to functions defined in a sourced file never get call edges #2141

Summary

When a Bash script calls a function that's defined in a sourced file, graphify never records the call edge. The function definitions and the source/import edge are all indexed fine, but the caller shows zero outgoing calls to the sourced function — so shell scripts look disconnected from the libraries they use.

This is separate from #2079. #2079 is about the source edge (source "${VAR}/lib.sh" pointing at nothing). This one is about the call edge, and it happens even with a plain source ./lib.sh where the source edge resolves fine.

Reproduction (mainline v8)

b.sh

#!/usr/bin/env bash
b_func() { echo ok; }

a.sh

#!/usr/bin/env bash
source ./b.sh
main() { b_func; }

graphify .

In graph.json:

• imports_from: a.sh -> b.sh ✅ (source edge resolves)
• calls: [] ❌ (expected main -> b_func)

b_func has no incoming call edge, so graphify path main b_func and graphify callers b_func come up empty even though both functions are indexed.

Root cause

• extract_bash (graphify/extractors/bash.py) only records a call edge when the callee is defined in the same file (name in defined_functions). A call to a function from a sourced file is silently dropped, and the extractor returns just {"nodes", "edges"} — it never emits the raw_calls / bash_sources that other languages use for cross-file resolution.
• There's already a resolver for exactly this — resolve_bash_source_edges (graphify/symbol_resolution.py:404), with unit tests — but it has no call site anywhere in graphify/. It's defined and tested but not wired into the extract pipeline, and it has no raw_calls / bash_sources to work from anyway.

Suggested fix

Have extract_bash emit raw_calls for calls whose callee isn't defined in the current file (plus bash_sources for the source edges), then run them through resolve_bash_source_edges in the pipeline so cross-file calls to sourced functions become real calls edges.

Acceptance

• main -> b_func call edge exists for the repro above.
• Works for both source ./b.sh and the dirname "${BASH_SOURCE[0]}" / ${VAR} idiom (the source-edge half is Bash: source "${VAR}/lib.sh" emits an unresolvable edge — sourced libraries appear orphaned #2079).
• graphify callers b_func and graphify path main b_func resolve.
• A call to a genuinely undefined/external command still produces no edge.

Prior art

Aziron's atlas hit the same thing and split it into these two exact halves — source resolution and the intra-function call — in aziron-ai/atlas#13, which also references #2079.

Environment: graphify 0.9.25 (v8), macOS arm64.