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author | Pascal Hertleif <[email protected]> | 2019-11-13 19:51:57 +0000 |
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committer | Pascal Hertleif <[email protected]> | 2019-11-13 19:51:57 +0000 |
commit | 5075c77957e127be51e1b5271567f906abeb50c6 (patch) | |
tree | c8e8d8f29011ad2b2472a201561f3f3dc1627d8f /xtask/src/bin/pre-commit.rs | |
parent | 5e3c1c2b5f63e57f98a7d02f75a559d225341b1c (diff) |
Use anyhow::Result in xtask, add contexts
This builds on #2231 but was actually done before that. You see, the
cause for #2231 was that I got this error message:
Error: Error { kind: Io(Os { code: 2, kind: NotFound, message: "No such file or directory" }) }
Just switching to `anyhow::Result` got me stack traces (when setting
`RUST_LIB_BACKTRACE=1`) that at least showed
stack backtrace:
0: std::backtrace::Backtrace::create
1: std::backtrace::Backtrace::capture
2: anyhow::error::<impl core::convert::From<E> for anyhow::Error>::from
3: xtask::install_server
4: xtask::install
5: xtask::main
6: std::rt::lang_start::{{closure}}
7: std::panicking::try::do_call
8: __rust_maybe_catch_panic
9: std::rt::lang_start_internal
10: std::rt::lang_start
11: main
With the added contexts (not at all exhaustive), the error became
Error: install server
Caused by:
0: build AutoCfg with target directory
1: No such file or directory (os error 2)
Since anyhow is such a small thing (no new transitive dependencies!),
and in general gives you `Result<T, Box<dyn Error>>` on steroids, I
think this a nice small change. The only slightly annoying thing was to
replace all the `Err(format!(…))?` calls (haven't even looked at whether
we can make it support wrapping strings though), but the `bail!` macro
is shorter anyway :)
Diffstat (limited to 'xtask/src/bin/pre-commit.rs')
-rw-r--r-- | xtask/src/bin/pre-commit.rs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/xtask/src/bin/pre-commit.rs b/xtask/src/bin/pre-commit.rs index cc6ccb25e..44507fb74 100644 --- a/xtask/src/bin/pre-commit.rs +++ b/xtask/src/bin/pre-commit.rs | |||
@@ -19,10 +19,10 @@ fn update_staged() -> Result<()> { | |||
19 | .current_dir(&root) | 19 | .current_dir(&root) |
20 | .output()?; | 20 | .output()?; |
21 | if !output.status.success() { | 21 | if !output.status.success() { |
22 | Err(format!( | 22 | anyhow::bail!( |
23 | "`git diff --diff-filter=MAR --name-only --cached` exited with {}", | 23 | "`git diff --diff-filter=MAR --name-only --cached` exited with {}", |
24 | output.status | 24 | output.status |
25 | ))?; | 25 | ); |
26 | } | 26 | } |
27 | for line in String::from_utf8(output.stdout)?.lines() { | 27 | for line in String::from_utf8(output.stdout)?.lines() { |
28 | run(&format!("git update-index --add {}", root.join(line).to_string_lossy()), ".")?; | 28 | run(&format!("git update-index --add {}", root.join(line).to_string_lossy()), ".")?; |