How can I only show warnings if there are no errors?












3















Often during development, I have a bunch of unused imports and variables. I like to fix those after I have correctly working code. The warnings these generate cause me to scroll though the cargo build output to find errors among all the warnings.



Is that possible to only show the warnings if compilation succeeds?



I don't want to ignore the warnings entirely, since I do want to solve them before committing the code.






compiler-errors rust compiler-warnings rust-cargo







share|improve this question





























    3















    Often during development, I have a bunch of unused imports and variables. I like to fix those after I have correctly working code. The warnings these generate cause me to scroll though the cargo build output to find errors among all the warnings.



    Is that possible to only show the warnings if compilation succeeds?



    I don't want to ignore the warnings entirely, since I do want to solve them before committing the code.






    compiler-errors rust compiler-warnings rust-cargo







    share|improve this question



























      3












      3








      3








      Often during development, I have a bunch of unused imports and variables. I like to fix those after I have correctly working code. The warnings these generate cause me to scroll though the cargo build output to find errors among all the warnings.



      Is that possible to only show the warnings if compilation succeeds?



      I don't want to ignore the warnings entirely, since I do want to solve them before committing the code.






      compiler-errors rust compiler-warnings rust-cargo







      share|improve this question
















      Often during development, I have a bunch of unused imports and variables. I like to fix those after I have correctly working code. The warnings these generate cause me to scroll though the cargo build output to find errors among all the warnings.



      Is that possible to only show the warnings if compilation succeeds?



      I don't want to ignore the warnings entirely, since I do want to solve them before committing the code.






      compiler-errors rust compiler-warnings rust-cargo




      compiler-errors rust compiler-warnings rust-cargo






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 17 '18 at 20:51









      Shepmaster

      150k13292430




      150k13292430










      asked Nov 17 '18 at 20:27









      MarkMark

      8,67046491




      8,67046491
























          1 Answer
          1






          active

          oldest

          votes


















          2














          You can suppress warnings in your compilation using the -Awarnings flags. If you use Cargo, you can add it with:



          cargo rustc -- -Awarnings


          That will compile your crate with warnings disabled, so only errors will show up. When you get a successful compilation, you can switch back to:



          cargo build


          And your crate will compile again (because the flags have changed, the target is no longer up to date) and you will get the detailed warnings.



          You can try automating them by running:



          cargo rustc -- -Awarnings && cargo build


          This has the drawback of compiling the crate twice if there are no errors and that can take some extra time.



          If you want to compile all the dependencies without the warnings, you can run instead:



          RUSTFLAGS=-Awarnings cargo build


          But then, the double compilation issue is quite more relevant.




          As as side note, I think that some IDEs (VSCode?) are able to do that: sort the compiler messages and filter out the ones you are not interested in.






          share|improve this answer


























          • You may use cargo check -- -Awarnings? I haven't tried, but it can save you some time.

            – hellow
            Nov 18 '18 at 13:55








          • 1





            @hellow: I tried, but unfortunately cargo check is not able to use rustc flags... at least I don't know how. You can use it with the RUSTFLAGS trick, though.

            – rodrigo
            Nov 18 '18 at 13:57













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          1 Answer
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          2














          You can suppress warnings in your compilation using the -Awarnings flags. If you use Cargo, you can add it with:



          cargo rustc -- -Awarnings


          That will compile your crate with warnings disabled, so only errors will show up. When you get a successful compilation, you can switch back to:



          cargo build


          And your crate will compile again (because the flags have changed, the target is no longer up to date) and you will get the detailed warnings.



          You can try automating them by running:



          cargo rustc -- -Awarnings && cargo build


          This has the drawback of compiling the crate twice if there are no errors and that can take some extra time.



          If you want to compile all the dependencies without the warnings, you can run instead:



          RUSTFLAGS=-Awarnings cargo build


          But then, the double compilation issue is quite more relevant.




          As as side note, I think that some IDEs (VSCode?) are able to do that: sort the compiler messages and filter out the ones you are not interested in.






          share|improve this answer


























          • You may use cargo check -- -Awarnings? I haven't tried, but it can save you some time.

            – hellow
            Nov 18 '18 at 13:55








          • 1





            @hellow: I tried, but unfortunately cargo check is not able to use rustc flags... at least I don't know how. You can use it with the RUSTFLAGS trick, though.

            – rodrigo
            Nov 18 '18 at 13:57


















          2














          You can suppress warnings in your compilation using the -Awarnings flags. If you use Cargo, you can add it with:



          cargo rustc -- -Awarnings


          That will compile your crate with warnings disabled, so only errors will show up. When you get a successful compilation, you can switch back to:



          cargo build


          And your crate will compile again (because the flags have changed, the target is no longer up to date) and you will get the detailed warnings.



          You can try automating them by running:



          cargo rustc -- -Awarnings && cargo build


          This has the drawback of compiling the crate twice if there are no errors and that can take some extra time.



          If you want to compile all the dependencies without the warnings, you can run instead:



          RUSTFLAGS=-Awarnings cargo build


          But then, the double compilation issue is quite more relevant.




          As as side note, I think that some IDEs (VSCode?) are able to do that: sort the compiler messages and filter out the ones you are not interested in.






          share|improve this answer


























          • You may use cargo check -- -Awarnings? I haven't tried, but it can save you some time.

            – hellow
            Nov 18 '18 at 13:55








          • 1





            @hellow: I tried, but unfortunately cargo check is not able to use rustc flags... at least I don't know how. You can use it with the RUSTFLAGS trick, though.

            – rodrigo
            Nov 18 '18 at 13:57
















          2












          2








          2







          You can suppress warnings in your compilation using the -Awarnings flags. If you use Cargo, you can add it with:



          cargo rustc -- -Awarnings


          That will compile your crate with warnings disabled, so only errors will show up. When you get a successful compilation, you can switch back to:



          cargo build


          And your crate will compile again (because the flags have changed, the target is no longer up to date) and you will get the detailed warnings.



          You can try automating them by running:



          cargo rustc -- -Awarnings && cargo build


          This has the drawback of compiling the crate twice if there are no errors and that can take some extra time.



          If you want to compile all the dependencies without the warnings, you can run instead:



          RUSTFLAGS=-Awarnings cargo build


          But then, the double compilation issue is quite more relevant.




          As as side note, I think that some IDEs (VSCode?) are able to do that: sort the compiler messages and filter out the ones you are not interested in.






          share|improve this answer















          You can suppress warnings in your compilation using the -Awarnings flags. If you use Cargo, you can add it with:



          cargo rustc -- -Awarnings


          That will compile your crate with warnings disabled, so only errors will show up. When you get a successful compilation, you can switch back to:



          cargo build


          And your crate will compile again (because the flags have changed, the target is no longer up to date) and you will get the detailed warnings.



          You can try automating them by running:



          cargo rustc -- -Awarnings && cargo build


          This has the drawback of compiling the crate twice if there are no errors and that can take some extra time.



          If you want to compile all the dependencies without the warnings, you can run instead:



          RUSTFLAGS=-Awarnings cargo build


          But then, the double compilation issue is quite more relevant.




          As as side note, I think that some IDEs (VSCode?) are able to do that: sort the compiler messages and filter out the ones you are not interested in.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 18 '18 at 13:53









          Shepmaster

          150k13292430




          150k13292430










          answered Nov 18 '18 at 13:39









          rodrigorodrigo

          63.4k492129




          63.4k492129













          • You may use cargo check -- -Awarnings? I haven't tried, but it can save you some time.

            – hellow
            Nov 18 '18 at 13:55








          • 1





            @hellow: I tried, but unfortunately cargo check is not able to use rustc flags... at least I don't know how. You can use it with the RUSTFLAGS trick, though.

            – rodrigo
            Nov 18 '18 at 13:57





















          • You may use cargo check -- -Awarnings? I haven't tried, but it can save you some time.

            – hellow
            Nov 18 '18 at 13:55








          • 1





            @hellow: I tried, but unfortunately cargo check is not able to use rustc flags... at least I don't know how. You can use it with the RUSTFLAGS trick, though.

            – rodrigo
            Nov 18 '18 at 13:57



















          You may use cargo check -- -Awarnings? I haven't tried, but it can save you some time.

          – hellow
          Nov 18 '18 at 13:55







          You may use cargo check -- -Awarnings? I haven't tried, but it can save you some time.

          – hellow
          Nov 18 '18 at 13:55






          1




          1





          @hellow: I tried, but unfortunately cargo check is not able to use rustc flags... at least I don't know how. You can use it with the RUSTFLAGS trick, though.

          – rodrigo
          Nov 18 '18 at 13:57







          @hellow: I tried, but unfortunately cargo check is not able to use rustc flags... at least I don't know how. You can use it with the RUSTFLAGS trick, though.

          – rodrigo
          Nov 18 '18 at 13:57




















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