git-contributor-stats/dist/features/charts.mjs.map

CLI to compute contributor and repository statistics from a Git repository (commits, lines added/deleted, frequency, heatmap, bus-factor), with filters and multiple output formats.

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{ svgEscape } from '../utils/formatting.ts';\n\ninterface BarChartOptions {\n  limit?: number;\n  width?: number;\n  height?: number;\n}\n\nexport function generateBarChartSVG(\n  title: string,\n  labels: string[],\n  values: number[],\n  options: BarChartOptions = {}\n): string {\n  const maxBars = Math.min(labels.length, options.limit || 20);\n  labels = labels.slice(0, maxBars);\n  values = values.slice(0, maxBars);\n\n  const width = options.width || 900;\n  const height = options.height || 360;\n  const margin = { top: 40, right: 20, bottom: 120, left: 80 };\n  const chartW = width - margin.left - margin.right;\n  const chartH = height - margin.top - margin.bottom;\n  const maxVal = Math.max(1, ...values);\n  const denominator = Math.max(1, maxBars);\n  const barW = (chartW / denominator) * 0.7;\n  const gap = (chartW / denominator) * 0.3;\n\n  const svg: string[] = [];\n  svg.push(\n    `<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"${width}\" height=\"${height}\" viewBox=\"0 0 ${width} ${height}\">`,\n    `<style>text{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;font-size:12px} .title{font-size:16px;font-weight:700}</style>`,\n    `<rect width=\"100%\" height=\"100%\" fill=\"#fff\"/>`,\n    `<text class=\"title\" x=\"${margin.left}\" y=\"${margin.top - 12}\">${svgEscape(title)}</text>`,\n    // axes\n    `<line x1=\"${margin.left}\" y1=\"${margin.top}\" x2=\"${margin.left}\" y2=\"${margin.top + chartH}\" stroke=\"#333\"/>`,\n    `<line x1=\"${margin.left}\" y1=\"${margin.top + chartH}\" x2=\"${margin.left + chartW}\" y2=\"${margin.top + chartH}\" stroke=\"#333\"/>`\n  );\n\n  // bars\n  for (let i = 0; i < labels.length; i++) {\n    const lab = labels[i];\n    const x = margin.left + i * (barW + gap) + gap * 0.5;\n    const h = Math.round((values[i] / maxVal) * chartH);\n    const y = margin.top + (chartH - h);\n    svg.push(\n      `<rect x=\"${x}\" y=\"${y}\" width=\"${barW}\" height=\"${h}\" fill=\"#4e79a7\"/>`,\n      `<text x=\"${x + barW / 2}\" y=\"${y - 4}\" text-anchor=\"middle\">${values[i]}</text>`\n    );\n    const labText = lab.length > 16 ? `${lab.slice(0, 16)}…` : lab;\n    svg.push(\n      `<g transform=\"translate(${x + barW / 2},${margin.top + chartH + 4}) rotate(45)\"><text text-anchor=\"start\">${svgEscape(labText)}</text></g>`\n    );\n  }\n\n  if (maxBars === 0) {\n    svg.push(\n      `<text x=\"${margin.left + chartW / 2}\" y=\"${margin.top + chartH / 2}\" text-anchor=\"middle\" fill=\"#666\">No data</text>`\n    );\n  }\n\n  // y ticks\n  for (let t = 0; t <= 4; t++) {\n    const val = Math.round((t / 4) * maxVal);\n    const yy = margin.top + chartH - Math.round((t / 4) * chartH);\n    svg.push(\n      `<line x1=\"${margin.left - 5}\" y1=\"${yy}\" x2=\"${margin.left}\" y2=\"${yy}\" stroke=\"#333\"/>`,\n      `<text x=\"${margin.left - 8}\" y=\"${yy + 4}\" text-anchor=\"end\">${val}</text>`\n    );\n  }\n  svg.push(`</svg>`);\n  return svg.join('');\n}\n\nexport function generateHeatmapSVG(heatmap: number[][]): string {\n  const cellW = 26,\n    cellH = 20;\n  const margin = { top: 28, right: 10, bottom: 10, left: 28 };\n  const width = margin.left + margin.right + 24 * cellW;\n  const height = margin.top + margin.bottom + 7 * cellH;\n  const max = Math.max(1, ...heatmap.flat());\n  const days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];\n\n  const svg: string[] = [];\n  svg.push(\n    `<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"${width}\" height=\"${height}\" viewBox=\"0 0 ${width} ${height}\">`,\n    `<style>text{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;font-size:10px}</style>`\n  );\n\n  // hour headers\n  for (let h = 0; h < 24; h++) {\n    svg.push(\n      `<text x=\"${margin.left + h * cellW + 6}\" y=\"${margin.top - 10}\" text-anchor=\"middle\">${h}</text>`\n    );\n  }\n\n  for (let d = 0; d < 7; d++) {\n    svg.push(\n      `<text x=\"${margin.left - 6}\" y=\"${margin.top + d * cellH + 14}\" text-anchor=\"end\">${days[d]}</text>`\n    );\n    for (let h = 0; h < 24; h++) {\n      const val = heatmap[d][h] || 0;\n      const intensity = Math.round((val / max) * 200);\n      const fill = `rgb(${255 - intensity},255,${255 - intensity})`;\n      svg.push(\n        `<rect x=\"${margin.left + h * cellW}\" y=\"${margin.top + d * cellH}\" width=\"${cellW - 1}\" height=\"${cellH - 1}\" fill=\"${fill}\"/>`\n      );\n      if (val > 0)\n        svg.push(\n          `<text x=\"${margin.left + h * cellW + cellW / 2}\" y=\"${margin.top + d * cellH + 14}\" text-anchor=\"middle\">${val}</text>`\n        );\n    }\n  }\n  svg.push(`</svg>`);\n  return svg.join('');\n}\n","import fs from 'node:fs';\nimport path from 'node:path';\nimport { ensureDir } from '../utils/files.ts';\nimport { generateBarChartSVG, generateHeatmapSVG } from './svg.ts';\n\ninterface ChartOptions {\n  width?: number;\n  height?: number;\n  verbose?: boolean;\n  limit?: number;\n}\n\n// ESM-only: Use top-level await to load chart libraries\nlet ChartJSNodeCanvas: unknown = null;\nlet registerables: unknown = null;\n\ntry {\n  const [modCanvas, modChart] = await Promise.all([\n    import('chartjs-node-canvas'),\n    import('chart.js')\n  ]);\n  ChartJSNodeCanvas = modCanvas.ChartJSNodeCanvas;\n  registerables = modChart.registerables;\n} catch (_error) {\n  // Chart library not available, will fall back to SVG\n  if (process.env.NODE_ENV !== 'production') {\n    console.warn('[warn] chartjs-node-canvas not available, using fallback SVG generation.');\n  }\n}\n\nfunction createCanvas(format: string, width: number, height: number): unknown {\n  if (!ChartJSNodeCanvas) return null;\n\n  const type = format === 'svg' ? 'svg' : 'png';\n  // biome-ignore lint/suspicious/noExplicitAny: ChartJS types are dynamic and not available at compile time\n  return new (ChartJSNodeCanvas as any)({\n    width,\n    height,\n    type,\n    chartCallback: (ChartJS: unknown) => {\n      try {\n        // biome-ignore lint/suspicious/noExplicitAny: ChartJS types are dynamic\n        if (ChartJS && registerables) (ChartJS as any).register(...(registerables as any));\n      } catch (_error) {\n        // Ignore registration errors\n      }\n    }\n  });\n}\n\nfunction validateAndPrepareDirectory(filePath: string): boolean {\n  try {\n    ensureDir(path.dirname(filePath));\n    return true;\n  } catch (error: unknown) {\n    const message = error instanceof Error ? error.message : JSON.stringify(error);\n    console.error(`[error] Failed to create directory: ${message}`);\n    return false;\n  }\n}\n\nfunction sanitizeChartData(\n  labels: string[],\n  values: number[],\n  title: string,\n  verbose?: boolean\n): { labels: string[]; values: number[] } {\n  if (!labels || !values || labels.length === 0) {\n    if (verbose) {\n      console.warn(`[warn] No data for bar chart: ${title}`);\n    }\n    return { labels: ['No data'], values: [0] };\n  }\n  return { labels, values };\n}\n\nfunction shouldUsePNG(format: string): boolean {\n  return format !== 'svg' && ChartJSNodeCanvas !== null;\n}\n\nasync function renderSVGFallback(\n  filePath: string,\n  generator: () => string,\n  errorContext: string\n): Promise<void> {\n  try {\n    const svg = generator();\n    fs.writeFileSync(filePath, svg, 'utf8');\n  } catch (error: unknown) {\n    const message = error instanceof Error ? error.message : JSON.stringify(error);\n    console.error(`[error] ${errorContext}: ${message}`);\n  }\n}\n\nexport async function renderBarChartImage(\n  format: string,\n  title: string,\n  labels: string[],\n  values: number[],\n  filePath: string,\n  options: ChartOptions = {}\n): Promise<void> {\n  if (!validateAndPrepareDirectory(filePath)) return;\n\n  const { width = 900, height = 400, verbose = false, limit = 25 } = options;\n  const sanitized = sanitizeChartData(labels, values, title, verbose);\n\n  // Use SVG if format is svg or PNG library is unavailable\n  if (!shouldUsePNG(format)) {\n    await renderSVGFallback(\n      filePath,\n      () => generateBarChartSVG(title, sanitized.labels, sanitized.values, { limit }),\n      `Failed to generate SVG chart ${filePath}`\n    );\n    return;\n  }\n\n  // Render PNG using ChartJS\n  try {\n    const canvas = createCanvas(format, width, height);\n    if (!canvas) {\n      // Fallback to SVG if canvas creation failed\n      await renderSVGFallback(\n        filePath,\n        () => generateBarChartSVG(title, sanitized.labels, sanitized.values, { limit }),\n        `Canvas creation failed for ${filePath}`\n      );\n      return;\n    }\n\n    const config = {\n      type: 'bar',\n      data: {\n        labels: sanitized.labels,\n        datasets: [\n          {\n            label: title,\n            data: sanitized.values,\n            backgroundColor: '#4e79a7'\n          }\n        ]\n      },\n      options: {\n        plugins: {\n          title: { display: true, text: title },\n          legend: { display: false }\n        },\n        responsive: false,\n        scales: {\n          x: { ticks: { maxRotation: 45, minRotation: 45, autoSkip: false } },\n          y: { beginAtZero: true }\n        }\n      }\n    };\n\n    const mime = format === 'svg' ? 'image/svg+xml' : 'image/png';\n    // biome-ignore lint/suspicious/noExplicitAny: Canvas renderToBuffer requires dynamic typing\n    const buffer = await (canvas as any).renderToBuffer(config, mime);\n    fs.writeFileSync(filePath, buffer);\n  } catch (error: unknown) {\n    const message = error instanceof Error ? error.message : JSON.stringify(error);\n    console.error(`[error] Failed to generate PNG chart: ${message}`);\n    // Fallback to SVG on error\n    await renderSVGFallback(\n      filePath,\n      () => generateBarChartSVG(title, sanitized.labels, sanitized.values, { limit }),\n      `Fallback SVG generation failed for ${filePath}`\n    );\n  }\n}\n\nexport async function renderHeatmapImage(\n  format: string,\n  heatmap: number[][],\n  filePath: string,\n  options: ChartOptions = {}\n): Promise<void> {\n  if (!validateAndPrepareDirectory(filePath)) return;\n\n  const { width = 900, height = 220, verbose = false } = options;\n\n  // Sanitize heatmap data\n  const sanitizedHeatmap =\n    !heatmap || !Array.isArray(heatmap) || heatmap.length === 0\n      ? (() => {\n          if (verbose) {\n            console.warn('[warn] Invalid heatmap data, creating empty heatmap');\n          }\n          return Array.from({ length: 7 }, () => new Array(24).fill(0));\n        })()\n      : heatmap;\n\n  // Use SVG if format is svg or PNG library is unavailable\n  if (!shouldUsePNG(format)) {\n    await renderSVGFallback(\n      filePath,\n      () => generateHeatmapSVG(sanitizedHeatmap),\n      `Failed to generate SVG heatmap ${filePath}`\n    );\n    return;\n  }\n\n  // Render PNG using ChartJS\n  try {\n    const canvas = createCanvas(format, width, height);\n    if (!canvas) {\n      // Fallback to SVG if canvas creation failed\n      await renderSVGFallback(\n        filePath,\n        () => generateHeatmapSVG(sanitizedHeatmap),\n        `Canvas creation failed for ${filePath}`\n      );\n      return;\n    }\n\n    const days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];\n    const hours = Array.from({ length: 24 }, (_, i) => i);\n\n    const datasets = sanitizedHeatmap.map((row, i) => ({\n      label: days[i],\n      data: row,\n      backgroundColor: row.map((val) => {\n        const maxVal = Math.max(1, Math.max(...row));\n        const alpha = val > 0 ? Math.min(1, 0.15 + 0.85 * (val / maxVal)) : 0.05;\n        return `rgba(78,121,167,${alpha})`;\n      }),\n      borderWidth: 0,\n      type: 'bar',\n      barPercentage: 1,\n      categoryPercentage: 1\n    }));\n\n    const config = {\n      type: 'bar',\n      data: { labels: hours, datasets },\n      options: {\n        indexAxis: 'y',\n        plugins: {\n          title: { display: true, text: 'Commit Activity Heatmap (weekday x hour)' },\n          legend: { display: false }\n        },\n        responsive: false,\n        scales: {\n          x: { stacked: true, beginAtZero: true },\n          y: { stacked: true }\n        }\n      }\n    };\n\n    const mime = format === 'svg' ? 'image/svg+xml' : 'image/png';\n    // biome-ignore lint/suspicious/noExplicitAny: Canvas renderToBuffer requires dynamic typing\n    const buffer = await (canvas as any).renderToBuffer(config, mime);\n    fs.writeFileSync(filePath, buffer);\n  } catch (error: unknown) {\n    const message = error instanceof Error ? error.message : JSON.stringify(error);\n    console.error(`[error] Failed to generate PNG heatmap: ${message}`);\n    // Fallback to SVG on error\n    await renderSVGFallback(\n      filePath,\n      () => generateHeatmapSVG(sanitizedHeatmap),\n      `Fallback SVG generation failed for ${filePath}`\n    );\n  }\n}\n","// Feature: Chart generation (SVG and PNG)\r\n// Lazy-loadable module for chart rendering\r\n\r\nimport fs from 'node:fs';\r\nimport path from 'node:path';\r\nimport { renderBarChartImage, renderHeatmapImage } from '../charts/renderer.ts';\r\nimport { generateBarChartSVG, generateHeatmapSVG } from '../charts/svg.ts';\r\nimport { ensureDir } from '../utils/files.ts';\r\nimport type { ContributorStatsResult } from './stats.ts';\r\n\r\nexport interface ChartOptions {\r\n  charts?: boolean;\r\n  chartsDir?: string;\r\n  chartFormat?: string;\r\n  verbose?: boolean;\r\n}\r\n\r\nexport async function generateCharts(\r\n  final: ContributorStatsResult,\r\n  opts: ChartOptions = {},\r\n  outDir?: string\r\n): Promise<void> {\r\n  const chartsRequested = opts.charts;\r\n  if (!chartsRequested) return;\r\n\r\n  const chartsDir = outDir || opts.chartsDir || path.join(process.cwd(), 'charts');\r\n  ensureDir(chartsDir);\r\n\r\n  const formatOpt = String(opts.chartFormat || 'svg').toLowerCase();\r\n  const formats = formatOpt === 'both' ? ['svg', 'png'] : [formatOpt === 'png' ? 'png' : 'svg'];\r\n\r\n  const names = final.topContributors.map((c) => String(c.name || ''));\r\n  const commitsVals = final.topContributors.map((c) => Number(c.commits || 0));\r\n  const netVals = final.topContributors.map((c) => Number(c.added || 0) - Number(c.deleted || 0));\r\n\r\n  const tasks: Promise<void>[] = [];\r\n  for (const fmt of formats) {\r\n    const ext = fmt === 'svg' ? '.svg' : '.png';\r\n    tasks.push(\r\n      renderBarChartImage(\r\n        fmt,\r\n        'Top contributors by commits',\r\n        names,\r\n        commitsVals,\r\n        path.join(chartsDir, `top-commits${ext}`),\r\n        { limit: 25, verbose: opts.verbose }\r\n      ),\r\n      renderBarChartImage(\r\n        fmt,\r\n        'Top contributors by net lines',\r\n        names,\r\n        netVals,\r\n        path.join(chartsDir, `top-net${ext}`),\r\n        { limit: 25, verbose: opts.verbose }\r\n      ),\r\n      renderHeatmapImage(fmt, final.heatmap, path.join(chartsDir, `heatmap${ext}`), {\r\n        verbose: opts.verbose\r\n      })\r\n    );\r\n  }\r\n  await Promise.all(tasks);\r\n\r\n  if (formats.includes('svg')) {\r\n    await ensureFallbackSVGs(chartsDir, names, commitsVals, netVals, final.heatmap, opts.verbose);\r\n  }\r\n  console.error(`Wrote ${formats.join('+').toUpperCase()} charts to ${chartsDir}`);\r\n}\r\n\r\nasync function ensureFallbackSVGs(\r\n  chartsDir: string,\r\n  names: string[],\r\n  commitsVals: number[],\r\n  netVals: number[],\r\n  heatmap: number[][],\r\n  verbose?: boolean\r\n): Promise<void> {\r\n  const svgFiles = [\r\n    {\r\n      path: path.join(chartsDir, 'top-commits.svg'),\r\n      gen: () =>\r\n        generateBarChartSVG('Top contributors by commits', names, commitsVals, { limit: 25 })\r\n    },\r\n    {\r\n      path: path.join(chartsDir, 'top-net.svg'),\r\n      gen: () => generateBarChartSVG('Top contributors by net lines', names, netVals, { limit: 25 })\r\n    },\r\n    { path: path.join(chartsDir, 'heatmap.svg'), gen: () => generateHeatmapSVG(heatmap) }\r\n  ];\r\n  for (const { path: svgPath, gen } of svgFiles) {\r\n    if (!fs.existsSync(svgPath)) {\r\n      try {\r\n        fs.writeFileSync(svgPath, gen(), 'utf8');\r\n      } catch (e) {\r\n        if (verbose) console.error('[error] Fallback write failed', svgPath, (e as Error).message);\r\n      }\r\n    }\r\n  }\r\n}\r\n"],"file":"charts.mjs"}