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app.go
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app.go
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package migrations
import (
"fmt"
_ "github.com/lib/pq"
"os"
"text/tabwriter"
)
func Init(migrate migration) {
args := os.Args
if len(args) == 1 {
outputHelpText()
return
}
command := args[1]
switch command {
case "generate":
migrate.GenerateMigration()
break
case "migrate":
migrate.RunMigrations()
break
case "down":
migrate.Down()
break
case "revert":
if len(args) == 2 {
outputHelpText()
panic("No migration given to revert")
}
requestedMigration := args[2]
migrate.DownTo(requestedMigration)
break
case "status":
migrate.Status()
break
default:
outputHelpText()
panic("This command is not supported")
}
}
func outputHelpText() {
w := new(tabwriter.Writer)
w.Init(os.Stdout, 0, 8, 0, '\t', 0)
_, _ = fmt.Println("Usage: go cli/migrations.go [COMMAND]")
_, _ = fmt.Println()
_, _ = fmt.Println("Available commands:")
_, _ = fmt.Fprintln(w, "\tgenerate \t This generates a new migration")
_, _ = fmt.Fprintln(w, "\tmigrate \t Run the migrations")
_, _ = fmt.Fprintln(w, "\tdown \t the last ran migration according to down.sql")
_, _ = fmt.Fprintln(w, "\trevert \t Revert to a specific migration")
_, _ = fmt.Fprintln(w, "\tstatus \t Warn about any migration that hasn't run")
_, _ = fmt.Fprintln(w)
_ = w.Flush()
}