add no-new-root check to josh pull
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a200391f54
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0274d34f75
@ -95,6 +95,14 @@ pub(crate) fn run(self, sh: &Shell) -> anyhow::Result<()> {
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if !cmd!(sh, "git status --untracked-files=no --porcelain").read()?.is_empty() {
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if !cmd!(sh, "git status --untracked-files=no --porcelain").read()?.is_empty() {
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bail!("working directory must be clean before running `cargo xtask pull`");
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bail!("working directory must be clean before running `cargo xtask pull`");
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}
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}
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// This should not add any new root commits. So count those before and after merging.
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let num_roots = || -> anyhow::Result<u32> {
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Ok(cmd!(sh, "git rev-list HEAD --max-parents=0 --count")
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.read()
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.context("failed to determine the number of root commits")?
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.parse::<u32>()?)
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};
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let num_roots_before = num_roots()?;
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// Make sure josh is running.
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// Make sure josh is running.
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let josh = start_josh()?;
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let josh = start_josh()?;
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@ -126,6 +134,11 @@ pub(crate) fn run(self, sh: &Shell) -> anyhow::Result<()> {
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.run()
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.run()
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.context("FAILED to merge new commits, something went wrong")?;
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.context("FAILED to merge new commits, something went wrong")?;
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// Check that the number of roots did not increase.
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if num_roots()? != num_roots_before {
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bail!("Josh created a new root commit. This is probably not the history you want.");
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}
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drop(josh);
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drop(josh);
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Ok(())
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Ok(())
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}
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}
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