Replace the interim renderers with a dedicated presenter package that
formats scan results in three ways.
Presenter (internal/presenter):
- Formatter interface with Present()/For() dispatch on format name:
table, json, compact
- TableFormatter: aligned tabwriter table with REPOSITORY / BRANCH /
STATUS / AHEAD-BEHIND / CHANGES / STASH columns, per-repo change
summaries like "2M 1U", error details inline, and a colored summary
line ("N repos | N clean | N need attention | N errors")
- JSONFormatter: indented document with scanned_at, parent_dir, repos,
and an aggregate summary for scripting; statuses render as string
labels ("modified") instead of raw integers
- CompactFormatter: one line per repo with color-coded status symbols
(✓ ✗ ↑ ↓ ⇄ ◉ ▢ !) plus branch, ahead/behind, and change counts
- Color handling: auto/always/never modes, TTY detection, and the
NO_COLOR convention (explicit --color=always still wins); paths have
$HOME collapsed to "~" in table and compact views
Domain model (pkg/status):
- JSON tags on RepoInfo/ScanResult/Summary for clean field names
- RepoStatus now marshals to its string label and unmarshals from both
string labels and numeric values, so JSON output round-trips
Configuration (internal/config):
- New --color flag (auto/always/never) validated in Load and included in
the config dump; keyed as "color" in viper
CLI (cmd/gitflow):
- scan now routes through presenter.Present with the resolved color mode;
the interim renderers are removed
Testing:
- Table content (columns, change summaries, error text, summary line) and
absence of escape codes with ColorNever
- ColorAlways emits ANSI codes even under NO_COLOR; auto stays clean on
non-terminal writers
- JSON decodes back into the domain types (string statuses round-trip)
- Compact symbols and counts; unknown formats rejected
- RepoStatus JSON round trip covers every status
Verified: go build, go vet, go test -race, gofmt clean; manual smoke of
table / compact / forced-color / JSON output against a scratch directory.
