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t/chainlint: add chainlint "whitespace" test cases The --chain-lint option uses heuristics and knowledge of shell syntax to detect broken &&-chains in subshells by pure textual inspection. The heuristics handle a range of stylistic variations in existing tests (evolved over the years), however, they are still best-guesses. As such, it is possible for future changes to accidentally break assumptions upon which the heuristics are based. Protect against this possibility by adding tests which check the linter itself for correctness. In addition to protecting against regressions, these tests help document (for humans) expected behavior, which is important since the linter's implementation language ('sed') does not necessarily lend itself to easy comprehension. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> 2018-07-11 08:46:36 +02:00			`(`
			`echo wobba gorgo snoot wafta snurb &&`
			`?!AMP?! cat >bip`
			`echo >bop`
chainlint: match arbitrary here-docs tags rather than hard-coded names chainlint.sed swallows top-level here-docs to avoid being fooled by content which might look like start-of-subshell. It likewise swallows here-docs in subshells to avoid marking content lines as breaking the &&-chain, and to avoid being fooled by content which might look like end-of-subshell, start-of-nested-subshell, or other specially-recognized constructs. At the time of implementation, it was believed that it was not possible to support arbitrary here-doc tag names since 'sed' provides no way to stash the opening tag name in a variable for later comparison against a line signaling end-of-here-doc. Consequently, tag names are hard-coded, with "EOF" being the only tag recognized at the top-level, and only "EOF", "EOT", and "INPUT_END" being recognized within subshells. Also, special care was taken to avoid being confused by here-docs nested within other here-docs. In practice, this limited number of hard-coded tag names has been "good enough" for the 13000+ existing Git test, despite many of those tests using tags other than the recognized ones, since the bodies of those here-docs do not contain content which would fool the linter. Nevertheless, the situation is not ideal since someone writing new tests, and choosing a name not in the "blessed" set could potentially trigger a false-positive. To address this shortcoming, upgrade chainlint.sed to handle arbitrary here-doc tag names, both at the top-level and within subshells. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> 2018-08-13 10:47:34 +02:00			`>) &&`
			`(`
			`cat >bup &&`
chainlint: match 'quoted' here-doc tags A here-doc tag can be quoted ('EOF') or escaped (\EOF) to suppress interpolation within the body. Although, chainlint recognizes escaped tags, it does not know about quoted tags. For completeness, teach it to recognize quoted tags, as well. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> 2018-08-13 10:47:35 +02:00			`cat >bup2 &&`
chainlint: match "quoted" here-doc tags A here-doc tag can be quoted ('EOF'/"EOF") or escaped (\EOF) to suppress interpolation within the body. chainlint recognizes single-quoted and escaped tags, but does not know about double-quoted tags. For completeness, teach it to recognize double-quoted tags, as well. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> 2018-08-29 11:45:32 +02:00			`cat >bup3 &&`
chainlint: match arbitrary here-docs tags rather than hard-coded names chainlint.sed swallows top-level here-docs to avoid being fooled by content which might look like start-of-subshell. It likewise swallows here-docs in subshells to avoid marking content lines as breaking the &&-chain, and to avoid being fooled by content which might look like end-of-subshell, start-of-nested-subshell, or other specially-recognized constructs. At the time of implementation, it was believed that it was not possible to support arbitrary here-doc tag names since 'sed' provides no way to stash the opening tag name in a variable for later comparison against a line signaling end-of-here-doc. Consequently, tag names are hard-coded, with "EOF" being the only tag recognized at the top-level, and only "EOF", "EOT", and "INPUT_END" being recognized within subshells. Also, special care was taken to avoid being confused by here-docs nested within other here-docs. In practice, this limited number of hard-coded tag names has been "good enough" for the 13000+ existing Git test, despite many of those tests using tags other than the recognized ones, since the bodies of those here-docs do not contain content which would fool the linter. Nevertheless, the situation is not ideal since someone writing new tests, and choosing a name not in the "blessed" set could potentially trigger a false-positive. To address this shortcoming, upgrade chainlint.sed to handle arbitrary here-doc tag names, both at the top-level and within subshells. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> 2018-08-13 10:47:34 +02:00			`meep`
t/chainlint: add chainlint "whitespace" test cases The --chain-lint option uses heuristics and knowledge of shell syntax to detect broken &&-chains in subshells by pure textual inspection. The heuristics handle a range of stylistic variations in existing tests (evolved over the years), however, they are still best-guesses. As such, it is possible for future changes to accidentally break assumptions upon which the heuristics are based. Protect against this possibility by adding tests which check the linter itself for correctness. In addition to protecting against regressions, these tests help document (for humans) expected behavior, which is important since the linter's implementation language ('sed') does not necessarily lend itself to easy comprehension. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> 2018-07-11 08:46:36 +02:00			`>)`