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Add "installGitPreCommitHook" sub command. (pinterest#487)
Move old one (`--install-git-pre-commit-hook`) option to be a ktlint subcommand - new syntax: `ktlint installGitPreCommitHook`. Old one `--install-git-pre-commit-hook` is still working, but deprecated. Signed-off-by: Yahor Berdnikau <egorr.berd@gmail.com>
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9 changes: 9 additions & 0 deletions
9
ktlint/src/main/kotlin/com/pinterest/ktlint/internal/ByteArrayExt.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| package com.pinterest.ktlint.internal | ||
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| import java.math.BigInteger | ||
| import java.security.MessageDigest | ||
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| /** | ||
| * Generate hex string for given [ByteArray] content. | ||
| */ | ||
| internal val ByteArray.hex get() = BigInteger(MessageDigest.getInstance("SHA-256").digest(this)).toString(16) |
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ktlint/src/main/kotlin/com/pinterest/ktlint/internal/CommandLineExt.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,20 @@ | ||
| package com.pinterest.ktlint.internal | ||
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| import kotlin.system.exitProcess | ||
| import picocli.CommandLine | ||
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| /** | ||
| * Check if user requested either help or version options, if yes - print it | ||
| * and exit process with [exitCode] exit code. | ||
| */ | ||
| internal fun CommandLine.printHelpOrVersionUsage( | ||
| exitCode: Int = 0 | ||
| ) { | ||
| if (isUsageHelpRequested) { | ||
| usage(System.out, CommandLine.Help.Ansi.OFF) | ||
| exitProcess(exitCode) | ||
| } else if (isVersionHelpRequested) { | ||
| printVersionHelp(System.out, CommandLine.Help.Ansi.OFF) | ||
| exitProcess(exitCode) | ||
| } | ||
| } |
84 changes: 84 additions & 0 deletions
84
ktlint/src/main/kotlin/com/pinterest/ktlint/internal/GitPreCommitHookSubCommand.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,84 @@ | ||
| package com.pinterest.ktlint.internal | ||
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| import com.pinterest.ktlint.KtlintCommandLine | ||
| import java.io.File | ||
| import kotlin.system.exitProcess | ||
| import picocli.CommandLine | ||
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| @CommandLine.Command( | ||
| description = [ | ||
| "Install git hook to automatically check files for style violations on commit", | ||
| "Usage of \"--install-git-pre-commit-hook\" command line option is deprecated!" | ||
| ], | ||
| aliases = ["--install-git-pre-commit-hook"], | ||
| mixinStandardHelpOptions = true, | ||
| versionProvider = KtlintVersionProvider::class | ||
| ) | ||
| class GitPreCommitHookSubCommand : Runnable { | ||
| @CommandLine.ParentCommand | ||
| private lateinit var ktlintCommand: KtlintCommandLine | ||
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| @CommandLine.Spec | ||
| private lateinit var commandSpec: CommandLine.Model.CommandSpec | ||
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| override fun run() { | ||
| commandSpec.commandLine().printHelpOrVersionUsage() | ||
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| val gitHooksDir = resolveGitHooksDir() | ||
| val preCommitHookFile = gitHooksDir.resolve("pre-commit") | ||
| val preCommitHook = loadGitPreCommitHookTemplate() | ||
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| if (preCommitHookFile.exists()) { | ||
| backupExistingPreCommitHook(gitHooksDir, preCommitHookFile, preCommitHook) | ||
| } | ||
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| // > .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit | ||
| preCommitHookFile.writeBytes(preCommitHook) | ||
| preCommitHookFile.setExecutable(true) | ||
| println(".git/hooks/pre-commit installed") | ||
| } | ||
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| private fun resolveGitHooksDir(): File { | ||
| val gitDir = File(".git") | ||
| if (!gitDir.isDirectory) { | ||
| System.err.println( | ||
| ".git directory not found. Are you sure you are inside project root directory?" | ||
| ) | ||
| exitProcess(1) | ||
| } | ||
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| val hooksDir = gitDir.resolve("hooks") | ||
| if (!hooksDir.exists() && !hooksDir.mkdir()) { | ||
| System.err.println("Failed to create .git/hooks folder") | ||
| exitProcess(1) | ||
| } | ||
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| return hooksDir | ||
| } | ||
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| private fun loadGitPreCommitHookTemplate(): ByteArray = ClassLoader | ||
| .getSystemClassLoader() | ||
| .getResourceAsStream( | ||
| "ktlint-git-pre-commit-hook${if (ktlintCommand.android) "-android" else ""}.sh" | ||
| ).use { it.readBytes() } | ||
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| private fun backupExistingPreCommitHook( | ||
| hooksDir: File, | ||
| preCommitHookFile: File, | ||
| expectedPreCommitHook: ByteArray | ||
| ) { | ||
| // backup existing hook (if any) | ||
| val actualPreCommitHook = preCommitHookFile.readBytes() | ||
| if (actualPreCommitHook.isNotEmpty() && | ||
| !actualPreCommitHook.contentEquals(expectedPreCommitHook) | ||
| ) { | ||
| val backupFile = hooksDir.resolve("pre-commit.ktlint-backup.${actualPreCommitHook.hex}") | ||
| println(".git/hooks/pre-commit -> $backupFile") | ||
| preCommitHookFile.copyTo(backupFile, overwrite = true) | ||
| } | ||
| } | ||
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| companion object { | ||
| const val COMMAND_NAME = "installGitPreCommitHook" | ||
| } | ||
| } |