mirror of
https://github.com/neilotoole/sq.git
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296 lines
8.3 KiB
Go
296 lines
8.3 KiB
Go
package cli
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import (
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"github.com/neilotoole/sq/cli/diff"
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"github.com/neilotoole/sq/cli/flag"
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"github.com/neilotoole/sq/cli/output/format"
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"github.com/neilotoole/sq/cli/output/tablew"
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"github.com/neilotoole/sq/cli/run"
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"github.com/neilotoole/sq/libsq/core/options"
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"github.com/neilotoole/sq/libsq/core/stringz"
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"github.com/samber/lo"
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"github.com/neilotoole/sq/libsq/core/errz"
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"github.com/neilotoole/sq/libsq/source"
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"github.com/spf13/cobra"
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)
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var OptDiffNumLines = options.NewInt(
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"diff.lines",
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"unified",
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'U',
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3,
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"Generate diffs with <n> lines of context",
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`Generate diffs with <n> lines of context, where n >= 0.`,
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)
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var OptDiffDataFormat = format.NewOpt(
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"diff.data.format",
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"format",
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'f',
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format.Text,
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"Output format (json, csv…) when comparing data",
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`Specify the output format to use when comparing table data.
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Available formats:
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text, csv, tsv,
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json, jsona, jsonl,
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markdown, html, xml, yaml`,
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)
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// diffFormats contains fewer formats than those in format.All.
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// That's because some of them are not text-based, e.g. XLSX,
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// and thus cause trouble with the text/line-based diff functionality.
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var diffFormats = []format.Format{
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format.Text, format.CSV, format.TSV,
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format.JSON, format.JSONA, format.JSONL,
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format.Markdown, format.HTML, format.XML, format.YAML,
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}
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var allDiffElementsFlags = []string{
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flag.DiffAll,
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flag.DiffOverview,
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flag.DiffSchema,
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flag.DiffDBProps,
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flag.DiffRowCount,
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flag.DiffData,
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}
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func newDiffCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "diff @HANDLE1[.TABLE] @HANDLE2[.TABLE] [--data]",
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Short: "BETA: Compare sources, or tables",
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Long: `BETA: Compare metadata, or row data, of sources and tables.
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CAUTION: This feature is in beta testing. Please report any issues:
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https://github.com/neilotoole/sq/issues/new/choose
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When comparing sources ("source diff"), the default behavior is to diff the
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source overview, schema, and table row counts. Table row data is not compared.
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When comparing tables ("table diff"), the default is to diff table schema and
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row counts. Table row data is not compared.
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Use flags to specify the elements you want to compare. The available
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elements are:
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--overview source metadata, without schema (source diff only)
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--dbprops database/server properties (source diff only)
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--schema schema structure, for database or individual table
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--counts show row counts when using --schema
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--data row data values
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--all all of the above
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Flag --data diffs the values of each row in the compared tables. Use with
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caution with large tables.
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Use --format with --data to specify the format to render the diff records.
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Line-based formats (e.g. "text" or "jsonl") are often the most ergonomic,
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although "yaml" may be preferable for comparing column values. The
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available formats are:
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text, csv, tsv,
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json, jsona, jsonl,
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markdown, html, xml, yaml
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The default format can be changed via:
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$ sq config set diff.data.format FORMAT
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The --format flag only applies with data diffs (--data). Metadata diffs are
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always output in YAML.
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Note that --overview and --dbprops only apply to source diffs, not table diffs.
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Flag --unified (-U) controls the number of lines to show surrounding a diff.
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The default (3) can be changed via:
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$ sq config set diff.lines N`,
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Args: cobra.ExactArgs(2),
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ValidArgsFunction: (&handleTableCompleter{
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handleRequired: true,
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max: 2,
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}).complete,
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RunE: execDiff,
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Example: `
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Metadata diff
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-------------
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# Diff sources (compare default elements).
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$ sq diff @prod/sakila @staging/sakila
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# As above, but show 7 lines surrounding each diff.
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$ sq diff @prod/sakila @staging/sakila -U7
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# Diff sources, but only compare source overview.
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$ sq diff @prod/sakila @staging/sakila --overview
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# Diff sources, but only DB properties.
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$ sq diff @prod/sakila @staging/sakila --dbprops
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# Compare source overview, and DB properties.
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$ sq diff @prod/sakila @staging/sakila -OB
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# Diff sources, but only compare schema.
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$ sq diff @prod/sakila @staging/sakila --schema
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# Compare schema table structure, and row counts.
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$ sq diff @prod/sakila @staging/sakila --SN
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# Compare everything, including table data. Caution: can be slow.
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$ sq diff @prod/sakila @staging/sakila --all
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# Compare metadata of actor table in prod vs staging.
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$ sq diff @prod/sakila.actor @staging/sakila.actor
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Row data diff
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-------------
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# Compare data in the actor tables.
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$ sq diff @prod/sakila.actor @staging/sakila.actor --data
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# Compare data in the actor tables, but output in JSONL.
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$ sq diff @prod/sakila.actor @staging/sakila.actor --data --format jsonl
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# Compare data in all tables and views. Caution: may be slow.
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$ sq diff @prod/sakila @staging/sakila --data`,
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}
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addOptionFlag(cmd.Flags(), OptDiffNumLines)
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addOptionFlag(cmd.Flags(), OptDiffDataFormat)
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cmd.Flags().BoolP(flag.DiffOverview, flag.DiffOverviewShort, false, flag.DiffOverviewUsage)
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cmd.Flags().BoolP(flag.DiffDBProps, flag.DiffDBPropsShort, false, flag.DiffDBPropsUsage)
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cmd.Flags().BoolP(flag.DiffSchema, flag.DiffSchemaShort, false, flag.DiffSchemaUsage)
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cmd.Flags().BoolP(flag.DiffRowCount, flag.DiffRowCountShort, false, flag.DiffRowCountUsage)
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cmd.Flags().BoolP(flag.DiffData, flag.DiffDataShort, false, flag.DiffDataUsage)
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cmd.Flags().BoolP(flag.DiffAll, flag.DiffAllShort, false, flag.DiffAllUsage)
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// If flag.DiffAll is provided, no other diff elements flag can be provided.
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nonAllFlags := lo.Drop(allDiffElementsFlags, 0)
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for i := range nonAllFlags {
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cmd.MarkFlagsMutuallyExclusive(flag.DiffAll, nonAllFlags[i])
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}
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panicOn(cmd.RegisterFlagCompletionFunc(
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OptDiffDataFormat.Flag(),
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completeStrings(-1, stringz.Strings(diffFormats)...),
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))
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return cmd
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}
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// execDiff compares sources or tables.
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func execDiff(cmd *cobra.Command, args []string) error {
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ctx := cmd.Context()
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ru := run.FromContext(ctx)
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handle1, table1, err := source.ParseTableHandle(args[0])
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if err != nil {
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return errz.Wrapf(err, "invalid input (1st arg): %s", args[0])
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}
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handle2, table2, err := source.ParseTableHandle(args[1])
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if err != nil {
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return errz.Wrapf(err, "invalid input (2nd arg): %s", args[1])
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}
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o, err := getOptionsFromCmd(cmd)
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if err != nil {
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return err
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}
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f := OptDiffDataFormat.Get(o)
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recwFn := getRecordWriterFunc(f)
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if recwFn == nil {
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// Shouldn't happen
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logFrom(cmd).Warn("No record writer impl for format", "format", f)
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recwFn = tablew.NewRecordWriter
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}
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diffCfg := &diff.Config{
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Lines: OptDiffNumLines.Get(o),
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RecordWriterFn: recwFn,
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}
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if diffCfg.Lines < 0 {
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return errz.Errorf("number of lines to show must be >= 0")
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}
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switch {
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case table1 == "" && table2 == "":
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elems := getDiffSourceElements(cmd)
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return diff.ExecSourceDiff(ctx, ru, diffCfg, elems, handle1, handle2)
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case table1 == "" || table2 == "":
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return errz.Errorf("invalid args: both must be either @HANDLE or @HANDLE.TABLE")
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default:
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elems := getDiffTableElements(cmd)
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return diff.ExecTableDiff(ctx, ru, diffCfg, elems, handle1, table1, handle2, table2)
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}
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}
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func getDiffSourceElements(cmd *cobra.Command) *diff.Elements {
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if !isAnyDiffElementsFlagChanged(cmd) {
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// Default
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return &diff.Elements{
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Overview: true,
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DBProperties: false,
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Schema: true,
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RowCount: true,
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Data: false,
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}
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}
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if cmdFlagChanged(cmd, flag.DiffAll) {
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return &diff.Elements{
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Overview: true,
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DBProperties: true,
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Schema: true,
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RowCount: true,
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Data: true,
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}
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}
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return &diff.Elements{
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Overview: cmdFlagIsSetTrue(cmd, flag.DiffOverview),
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DBProperties: cmdFlagIsSetTrue(cmd, flag.DiffDBProps),
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Schema: cmdFlagIsSetTrue(cmd, flag.DiffSchema),
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RowCount: cmdFlagIsSetTrue(cmd, flag.DiffRowCount),
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Data: cmdFlagIsSetTrue(cmd, flag.DiffData),
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}
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}
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func getDiffTableElements(cmd *cobra.Command) *diff.Elements {
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if !isAnyDiffElementsFlagChanged(cmd) {
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// Default
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return &diff.Elements{
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Schema: true,
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RowCount: true,
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}
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}
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if cmdFlagChanged(cmd, flag.DiffAll) {
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return &diff.Elements{
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Schema: true,
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RowCount: true,
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Data: true,
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}
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}
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return &diff.Elements{
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Schema: cmdFlagIsSetTrue(cmd, flag.DiffSchema),
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RowCount: cmdFlagIsSetTrue(cmd, flag.DiffRowCount),
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Data: cmdFlagIsSetTrue(cmd, flag.DiffData),
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}
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}
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func isAnyDiffElementsFlagChanged(cmd *cobra.Command) bool {
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for _, name := range allDiffElementsFlags {
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if cmdFlagChanged(cmd, name) {
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return true
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}
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}
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return false
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}
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